Merge branch 'release/5.7.6'

Bumps [laravel/framework](https://github.com/laravel/framework) from 9.11.0 to 9.12.2.
- [Release notes](https://github.com/laravel/framework/releases)
- [Changelog](https://github.com/laravel/framework/blob/9.x/CHANGELOG.md)
- [Commits](https://github.com/laravel/framework/compare/v9.11.0...v9.12.2)

---
updated-dependencies:
- dependency-name: laravel/framework
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

.ci/.env.ci

@@ -188,7 +188,7 @@ AUTHENTICATION_GUARD=web
 # Enter a custom URL here that will force a logout (your authentication provider can tell you).
 # Setting this variable only works when AUTHENTICATION_GUARD != web
 #
-CUSTOM_LOGOUT_URI=
+CUSTOM_LOGOUT_URL=
 
 # LDAP connection configuration
 # OpenLDAP, FreeIPA or ActiveDirectory
@@ -260,12 +260,6 @@ DISABLE_CSP_HEADER=false
 TRACKER_SITE_ID=
 TRACKER_URL=
 
-#
-# Firefly III can collect telemetry on how you use Firefly III. This is opt-in.
-# In order to allow this, change the following variable to true.
-# To read more about this feature, go to this page: https://docs.firefly-iii.org/support/telemetry
-SEND_TELEMETRY=false
-
 # You can fine tune the start-up of a Docker container by editing these environment variables.
 # Use this at your own risk. Disabling certain checks and features may result in lost of inconsistent data.
 # However if you know what you're doing you can significantly speed up container start times.

.ci/phpstan.neon

@@ -10,6 +10,19 @@ parameters:
     - '#is neither abstract nor final#'
     - '#Control structures using switch should not be used\.#'
     - '#has a nullable return type declaration#'
+    - '#with a nullable type declaration#'
+    - '#with null as default value#'
+    - '#Constructor in [a-zA-Z0-9\\_]+ has parameter \$[a-zA-Z0-9\\_]+ with default value#'
+    -
+        message: '#Function compact\(\) should not be used.#'
+        paths:
+            - ../app/Http/Controllers
+            - ../app/Support/Http/Controllers/RenderPartialViews.php
+            - ../app/Support/Form/FormSupport.php
+            - ../app/Support/Form/CurrencyForm.php
+            - ../app/Support/Form/AccountForm.php
+            - ../app/Support/ExpandedForm.php
+            - ../app/Generator/Report
   paths:
     - ../app
     - ../database
@@ -17,4 +30,4 @@ parameters:
     - ../bootstrap/app.php
 
   # The level 8 is the highest level. original was 5
-  level: 5
+  level: 3

.ci/phpstan.sh

@@ -1,12 +1,33 @@
 #!/usr/bin/env bash
 
+#
+# phpstan.sh
+# Copyright (c) 2021 james@firefly-iii.org
+#
+# This file is part of Firefly III (https://github.com/firefly-iii).
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as
+# published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#
+
 # Install composer packages
-composer install --no-suggest --no-scripts --no-ansi
+#composer install --no-scripts --no-ansi
 
 # enable test .env file.
 cp .ci/.env.ci .env
 
 # Do static code analysis.
-./vendor/bin/phpstan analyse -c .ci/phpstan.neon --no-progress
+# ./vendor/bin/phpstan analyse -c .ci/phpstan.neon --no-progress
+./vendor/bin/phpstan analyse -c .ci/phpstan.neon
 
 exit 0

.ci/phpunit.sh

@@ -1,9 +1,30 @@
 #!/usr/bin/env bash
 
+#
+# phpunit.sh
+# Copyright (c) 2021 james@firefly-iii.org
+#
+# This file is part of Firefly III (https://github.com/firefly-iii).
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as
+# published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#
+
 # enable test .env file.
 cp .ci/.env.ci ../.env
 
 # download test database
+# TODO no longer exists
 wget --quiet https://raw.githubusercontent.com/firefly-iii/test-data/main/test_db.sqlite -o storage/database/test_db.sqlite
 
 # run phpunit

.deploy/heroku/.env.heroku

@@ -189,7 +189,7 @@ AUTHENTICATION_GUARD=web
 # Enter a custom URL here that will force a logout (your authentication provider can tell you).
 # Setting this variable only works when AUTHENTICATION_GUARD != web
 #
-CUSTOM_LOGOUT_URI=
+CUSTOM_LOGOUT_URL=
 
 # LDAP connection configuration
 # OpenLDAP, FreeIPA or ActiveDirectory
@@ -261,12 +261,6 @@ DISABLE_CSP_HEADER=false
 TRACKER_SITE_ID=
 TRACKER_URL=
 
-#
-# Firefly III can collect telemetry on how you use Firefly III. This is opt-in.
-# In order to allow this, change the following variable to true.
-# To read more about this feature, go to this page: https://docs.firefly-iii.org/support/telemetry
-SEND_TELEMETRY=false
-
 # You can fine tune the start-up of a Docker container by editing these environment variables.
 # Use this at your own risk. Disabling certain checks and features may result in lost of inconsistent data.
 # However if you know what you're doing you can significantly speed up container start times.

.deploy/heroku/.locales

@@ -13,8 +13,10 @@ nb_NO
 nl_NL
 pl_PL
 pt_BR
+pt_PT
 ro_RO
 ru_RU
+sk_SK
 sv_SE
 vi_VN
 zh-hans_CN

.env.example

@@ -37,21 +37,26 @@ TRUSTED_PROXIES=
 # Several other options exist. You can use 'single' for one big fat error log (not recommended).
 # Also available are 'syslog', 'errorlog' and 'stdout' which will log to the system itself.
 # A rotating log option is 'daily', creates 5 files that (surprise) rotate.
+# A cool option is 'papertrail' for cloud logging
 # Default setting 'stack' will log to 'daily' and to 'stdout' at the same time.
-
-# - Docker + versions <= 4.8.1.8 and before: use "stdout"
-# - Docker + versions >  4.8.1.8           : use "docker_out"
-# - Docker + versions >=  5.1.1            : use "stack"
-# - For everything else (als not Docker)   : use 'stack'
-
 LOG_CHANNEL=stack
 
+#
+# Used when logging to papertrail:
+#
+PAPERTRAIL_HOST=
+PAPERTRAIL_PORT=
+
 # Log level. You can set this from least severe to most severe:
 # debug, info, notice, warning, error, critical, alert, emergency
 # If you set it to debug your logs will grow large, and fast. If you set it to emergency probably
 # nothing will get logged, ever.
 APP_LOG_LEVEL=notice
 
+# Audit log level.
+# Set this to "emergency" if you dont want to store audit logs, leave on info otherwise.
+AUDIT_LOG_LEVEL=info
+
 # Database credentials. Make sure the database exists. I recommend a dedicated user for Firefly III
 # For other database types, please see the FAQ: https://docs.firefly-iii.org/support/faq
 # If you use Docker or similar, you can set these variables from a file by appending them with _FILE
@@ -59,11 +64,13 @@ APP_LOG_LEVEL=notice
 # Use "mysql" for MySQL and MariaDB.
 # Use "sqlite" for SQLite.
 DB_CONNECTION=mysql
-DB_HOST=fireflyiiidb
+DB_HOST=db
 DB_PORT=3306
 DB_DATABASE=firefly
 DB_USERNAME=firefly
 DB_PASSWORD=secret_firefly_password
+# leave empty or omit when not using a socket connection
+DB_SOCKET=
 
 # MySQL supports SSL. You can configure it here.
 # If you use Docker or similar, you can set these variables from a file by appending them with _FILE
@@ -84,11 +91,14 @@ PGSQL_SSL_CERT=null
 PGSQL_SSL_KEY=null
 PGSQL_SSL_CRL_FILE=null
 
-# If you're looking for performance improvements, you could install memcached.
+# more PostgreSQL settings
+PGSQL_SCHEMA=public
+
+# If you're looking for performance improvements, you could install memcached or redis
 CACHE_DRIVER=file
 SESSION_DRIVER=file
 
-# If you set either of these to 'redis', you might want to update these settings too
+# If you set either of the options above to 'redis', you might want to update these settings too
 # If you use Docker or similar, you can set REDIS_HOST_FILE, REDIS_PASSWORD_FILE or
 # REDIS_PORT_FILE to set the value from a file instead of from an environment variable
 
@@ -101,8 +111,8 @@ REDIS_PATH=
 # use only when using 'tcp' or 'http' for REDIS_SCHEME. Leave empty otherwise.
 REDIS_HOST=127.0.0.1
 REDIS_PORT=6379
-
 REDIS_PASSWORD=null
+
 # always use quotes and make sure redis db "0" and "1" exists. Otherwise change accordingly.
 REDIS_DB="0"
 REDIS_CACHE_DB="1"
@@ -110,11 +120,13 @@ REDIS_CACHE_DB="1"
 # Cookie settings. Should not be necessary to change these.
 # If you use Docker or similar, you can set COOKIE_DOMAIN_FILE to set
 # the value from a file instead of from an environment variable
+# Setting samesite to "strict" may give you trouble logging in.
 COOKIE_PATH="/"
 COOKIE_DOMAIN=
 COOKIE_SECURE=false
+COOKIE_SAMESITE=lax
 
-# If you want Firefly III to mail you, update these settings
+# If you want Firefly III to email you, update these settings
 # For instructions, see: https://docs.firefly-iii.org/advanced-installation/email
 # If you use Docker or similar, you can set these variables from a file by appending them with _FILE
 MAIL_MAILER=log
@@ -130,7 +142,6 @@ MAIL_ENCRYPTION=null
 MAILGUN_DOMAIN=
 MAILGUN_SECRET=
 
-
 # If you are on EU region in mailgun, use api.eu.mailgun.net, otherwise use api.mailgun.net
 # If you use Docker or similar, you can set this variable from a file by appending it with _FILE
 MAILGUN_ENDPOINT=api.mailgun.net
@@ -139,7 +150,7 @@ MAILGUN_ENDPOINT=api.mailgun.net
 MANDRILL_SECRET=
 SPARKPOST_SECRET=
 
-# Firefly III can send you the following messages
+# Firefly III can send you the following messages.
 SEND_REGISTRATION_MAIL=true
 SEND_ERROR_MESSAGE=true
 SEND_LOGIN_NEW_IP_WARNING=true
@@ -147,91 +158,41 @@ SEND_LOGIN_NEW_IP_WARNING=true
 # These messages contain (sensitive) transaction information:
 SEND_REPORT_JOURNALS=true
 
-# Set a Mapbox API key here (see mapbox.com) so there might be a map available at various places.
-# If you use Docker or similar, you can set this variable from a file by appending it with _FILE
-MAPBOX_API_KEY=
+# Set this value to true if you want to set the location
+# of certain things, like transactions. Since this involves an external service, it's optional
+# and disabled by default.
+ENABLE_EXTERNAL_MAP=false
 
 # The map will default to this location:
 MAP_DEFAULT_LAT=51.983333
 MAP_DEFAULT_LONG=5.916667
 MAP_DEFAULT_ZOOM=6
 
-# Firefly III has two options for user authentication. "eloquent" is the default,
-# and "ldap" for LDAP servers.
-# For full instructions on these settings please visit:
-# https://docs.firefly-iii.org/advanced-installation/authentication
-# If you use Docker or similar, you can set this variable from a file by appending it with _FILE
-LOGIN_PROVIDER=eloquent
+#
+# Firefly III authentication settings
+#
 
-# It's also possible to change the way users are authenticated. You could use Authelia for example.
-# Authentication via the REMOTE_USER header is supported. Change the value below to "remote_user_guard".
 #
-# This will also allow Windows SSO.
-#
-# If you do this please read the documentation for instructions and warnings:
+# Firefly III supports a few authentication methods:
+# - 'web' (default, uses built in DB)
+# - 'remote_user_guard' for Authelia etc
+# Read more about these settings in the documentation.
 # https://docs.firefly-iii.org/advanced-installation/authentication
 #
-# This function is available in Firefly III v5.3.0 and higher.
+# LDAP is no longer supported :(
+#
 AUTHENTICATION_GUARD=web
 
-# If the guard is changed, Firefly III uses the 'REMOTE_USER' header as per RFC 3875.
-# You can also use another header, like AUTH_USER when using Windows SSO.
-# Some systems use X-Auth headers. In that case, use HTTP_X_AUTH_USERNAME or HTTP_X_AUTH_EMAIL
-# Depending on your system, REMOTE_USER may need to be changed to HTTP_REMOTE_USER
 #
-# Firefly III won't be able to send emails when the header you use isn't an email address.
+# Remote user guard settings
 #
 AUTHENTICATION_GUARD_HEADER=REMOTE_USER
+AUTHENTICATION_GUARD_EMAIL=
 
-# Likewise, it's impossible to log out users who's authentication is handled by an external system.
-# Enter a custom URL here that will force a logout (your authentication provider can tell you).
-# Setting this variable only works when AUTHENTICATION_GUARD != web
 #
-CUSTOM_LOGOUT_URI=
-
-# LDAP connection configuration
-# OpenLDAP, FreeIPA or ActiveDirectory
-# # If you use Docker or similar, you can set this variable from a file by appending it with _FILE
-ADLDAP_CONNECTION_SCHEME=OpenLDAP
-ADLDAP_AUTO_CONNECT=true
-
-# LDAP connection settings
-# You can set the following variables from a file by appending them with _FILE:
-# ADLDAP_CONTROLLERS, ADLDAP_PORT, ADLDAP_BASEDN
-ADLDAP_CONTROLLERS=
-ADLDAP_PORT=389
-ADLDAP_TIMEOUT=5
-ADLDAP_BASEDN=""
-ADLDAP_FOLLOW_REFFERALS=false
-
-# SSL/TLS settings
-ADLDAP_USE_SSL=false
-ADLDAP_USE_TLS=false
-ADLDAP_SSL_CACERTDIR=
-ADLDAP_SSL_CACERTFILE=
-ADLDAP_SSL_CERTFILE=
-ADLDAP_SSL_KEYFILE=
-ADLDAP_SSL_CIPHER_SUITE=
-ADLDAP_SSL_REQUIRE_CERT=
-
-# You can set the following variables from a file by appending them with _FILE:
-ADLDAP_ADMIN_USERNAME=
-ADLDAP_ADMIN_PASSWORD=
-
-# You can set the following variables from a file by appending them with _FILE:
-ADLDAP_ACCOUNT_PREFIX=
-ADLDAP_ACCOUNT_SUFFIX=
-
-# LDAP authentication settings.
-ADLDAP_PASSWORD_SYNC=false
-ADLDAP_LOGIN_FALLBACK=false
-
-ADLDAP_DISCOVER_FIELD=distinguishedname
-ADLDAP_AUTH_FIELD=distinguishedname
-
-# field to sync as local username.
-# You can set the following variable from a file by appending it with _FILE:
-ADLDAP_SYNC_FIELD=userprincipalname
+# Extra authentication settings
+#
+CUSTOM_LOGOUT_URL=
 
 # You can disable the X-Frame-Options header if it interferes with tools like
 # Organizr. This is at your own risk. Applications running in frames run the risk
@@ -252,16 +213,34 @@ DISABLE_CSP_HEADER=false
 TRACKER_SITE_ID=
 TRACKER_URL=
 
-# Firefly III can collect telemetry on how you use Firefly III. This is opt-in.
-# In order to allow this, change the following variable to true.
-# To read more about this feature, go to this page: https://docs.firefly-iii.org/support/telemetry
-SEND_TELEMETRY=false
+#
+# Firefly III supports webhooks. These are security sensitive and must be enabled manually first.
+#
+ALLOW_WEBHOOKS=false
+
+#
+# The static cron job token can be useful when you use Docker and wish to manage cron jobs.
+# 1. Set this token to any 32-character value (this is important!).
+# 2. Use this token in the cron URL instead of a user's command line token.
+#
+# For more info: https://docs.firefly-iii.org/firefly-iii/advanced-installation/cron/
+#
+# You can set this variable from a file by appending it with _FILE
+#
+STATIC_CRON_TOKEN=
 
 # You can fine tune the start-up of a Docker container by editing these environment variables.
 # Use this at your own risk. Disabling certain checks and features may result in lost of inconsistent data.
 # However if you know what you're doing you can significantly speed up container start times.
 # Set each value to true to enable, or false to disable.
 
+# Set this to true to build all locales supported by Firefly III.
+# This may take quite some time (several minutes) and is generally not recommended.
+# If you wish to change or alter the list of locales, start your Docker container with
+# `docker run -v locale.gen:/etc/locale.gen -e DKR_BUILD_LOCALE=true`
+# and make sure your preferred locales are in your own locale.gen.
+DKR_BUILD_LOCALE=false
+
 # Check if the SQLite database exists. Can be skipped if you're not using SQLite.
 # Won't significantly speed up things.
 DKR_CHECK_SQLITE=true
@@ -290,11 +269,11 @@ DKR_RUN_PASSPORT_INSTALL=true
 # Leave the following configuration vars as is.
 # Unless you like to tinker and know what you're doing.
 APP_NAME=FireflyIII
-ADLDAP_CONNECTION=default
 BROADCAST_DRIVER=log
 QUEUE_DRIVER=sync
 CACHE_PREFIX=firefly
 PUSHER_KEY=
+IPINFO_TOKEN=
 PUSHER_SECRET=
 PUSHER_ID=
 DEMO_USERNAME=
@@ -307,6 +286,8 @@ FIREFLY_III_LAYOUT=v1
 # It won't work. It doesn't do ANYTHING. Don't believe the lies you read online. I'm not joking.
 # This configuration value WILL NOT HELP.
 #
+# Notable exception to this rule is Synology, which, according to some users, will use APP_URL to rewrite stuff.
+#
 # This variable is ONLY used in some of the emails Firefly III sends around. Nowhere else.
 # So when configuring anything WEB related this variable doesn't do anything. Nothing
 #

.github/.mergify.yml

@@ -1,7 +0,0 @@
-pull_request_rules:
-  - name: PR on main is never approved.
-    conditions:
-      - base=main
-    actions:
-      close:
-        message: Please reopen this PR on the `develop` branch. Thank you.

.github/ISSUE_TEMPLATE/Bug_report.md

@@ -1,25 +0,0 @@
----
-name: Bug report
-about: Create a report to help Firefly III improve
-
----
-
-**Bug description**
-I am running Firefly III version x.x.x, and my problem is:
-
-<!-- Replace the version and describe your problem or your issue may be closed. -->
-
-**Steps to reproduce**
-<!-- What do you need to do to trigger this bug? -->
-
-**Extra info**
-<!-- Please add extra info here, such as OS, browser, and the output from the /debug page of your Firefly III installation (click the version at the bottom). -->
-
-**Bonus points**
-<!-- Before you submit, verify the following please: -->
-
-- I searched and nobody reported this bug before
-- I have added a stack trace from my log files <!-- (see https://bit.ly/FF3-get-debug-info) -->
-- I have added a screenshot.
-- I was able to replicate it on the demo site https://demo.firefly-iii.org/
-<!-- - I donated money (this is a joke ;)-->

.github/ISSUE_TEMPLATE/Custom.md

@@ -1,23 +0,0 @@
----
-name: I have a question or a problem
-about: Ask away!
-
----
-
-I am running Firefly III version x.x.x.
-
-**Description**
-<!-- (if relevant of course) -->
-
-**Extra info**
-<!-- Please add extra info here, such as OS, browser, and the output from the `/debug`-page of your Firefly III installation (click the version at the bottom). --> 
-
-**Bonus points**
-
-<!-- Complete the following checklist for bonus points -->
-
-- I have read the FAQ at https://bit.ly/FF3-FAQ
-- I added a screenshot
-- I added log files <!-- (see https://bit.ly/FF3-get-debug-info) -->
-- I was able to replicate the issue on the demo site.
-<!-- - I donated money (this is a joke :wink:)-->

.github/ISSUE_TEMPLATE/Feature_request.md

@@ -1,31 +0,0 @@
----
-name: Feature request
-about: Suggest an idea or feature for Firefly III
-
----
-
-**Description**
-<!--
-Please describe your feature request:
-
-- I would like Firefly III to do ABC.
-- What if you would add feature XYZ?
-- Firefly III doesn't do DEF.
-
--->
-
-**Solution**
-<!-- Describe what your feature would add to Firefly III. -->
-
-**What are alternatives?**
-<!-- Please describe what alternatives currently exist. -->
-
-**Additional context**
-<!-- Add any other context or screenshots about the feature request here. -->
-
-**Bonus points**
-<!-- Earn bonus points by:
-
-- Make a drawing
-- Donate money (just kidding ;)
--->

.github/ISSUE_TEMPLATE/bug.yml

@@ -0,0 +1,57 @@
+name: Bug Report
+description: Report a bug in Firefly III (or associated tools)
+body:
+  - type: checkboxes
+    attributes:
+      label: Support guidelines
+      description: Please read the support guidelines before proceeding.
+      options:
+        - label: I've read the [support guidelines](https://github.com/firefly-iii/firefly-iii/blob/main/.github/support.md)
+          required: true
+
+  - type: checkboxes
+    attributes:
+      label: I've found a bug and checked that ...
+      description: Make sure that your request fulfills all of the following requirements. If one requirement cannot be satisfied, explain in detail why.
+      options:
+        - label: ... [the documentation](https://docs.firefly-iii.org/) does not mention anything about my problem
+        - label: ... there are no open or closed issues that are related to my problem
+        - label: ... it's [definitely me, not you](https://github.com/firefly-iii/firefly-iii/blob/main/.github/its_you_not_me.md)
+
+  - type: textarea
+    attributes:
+      label: Description
+      description: Please provide a brief description of the bug in 1-2 sentences.
+    validations:
+      required: true
+
+  - type: textarea
+    attributes:
+      label: Expected behaviour
+      description: Please describe precisely what you'd expect to happen.
+    validations:
+      required: true
+
+  - type: textarea
+    attributes:
+      label: Debug information
+      description: Please provide the table from the /debug page
+      placeholder: The output from the /debug page
+    validations:
+      required: true
+
+  - type: textarea
+    attributes:
+      label: Steps to reproduce
+      description: Please describe the steps to reproduce the bug.
+      placeholder: |
+        1. ...
+        2. ...
+        3. ...
+    validations:
+      required: false
+
+  - type: textarea
+    attributes:
+      label: Additional info
+      description: Please provide any additional information that seem useful.

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,5 @@
+blank_issues_enabled: false
+contact_links:
+  - name: Ask a question
+    url: https://github.com/firefly-iii/firefly-iii/discussions
+    about: Please ask and answer questions here.

.github/ISSUE_TEMPLATE/fr.yml

@@ -0,0 +1,42 @@
+name: Feature Request
+description: Request a feature or enhancement in Firefly III (or associated tools)
+body:
+  - type: checkboxes
+    attributes:
+      label: Support guidelines
+      description: Please read the support guidelines before proceeding.
+      options:
+        - label: I've read the [support guidelines](https://github.com/firefly-iii/firefly-iii/blob/main/.github/support.md)
+          required: true
+        - label: My request is not listed as [a very good idea, but unfortunately...](https://docs.firefly-iii.org/firefly-iii/about-firefly-iii/what-its-not/)
+          required: true
+        - label: I've used [the search](https://github.com/firefly-iii/firefly-iii/issues?q=is%3Aissue) and this has not been discussed before.
+          required: true
+
+  - type: textarea
+    attributes:
+      label: Description
+      description: Please describe your feature request
+      placeholder: |
+        - I would like Firefly III to do ABC.
+        - What if you would add feature XYZ?
+        - Firefly III doesn't do DEF.
+    validations:
+      required: true
+
+  - type: textarea
+    attributes:
+      label: Solution
+      description: Describe what your feature would add to Firefly III.
+    validations:
+      required: true
+
+  - type: textarea
+    attributes:
+      label: What are alternatives?
+      description: Please describe what alternatives currently exist.
+
+  - type: textarea
+    attributes:
+      label: Additional context
+      description: Add any other context or screenshots about the feature request here.

.github/contributing.md

@@ -1,15 +1,3 @@
-# Welcome to Firefly III on Github!
+# [Contributing guidelines](https://docs.firefly-iii.org/other-pages/contributing)
 
-:+1::tada: Thank you for taking the time to contribute something to Firefly III!
-
-## Feature requests
-
-I am always interested in expanding Firefly III's many features. Just open a ticket or [drop me a line](mailto:james@firefly-iii.org).
-
-## Pull requests
-
-When contributing to Firefly III, please first discuss the change you wish to make via issue, email, or any other method. I can only accept pull requests against the `develop` branch, never the `main` branch.
-
-## Translations :us: :fr: :de:
-
-If you see a spelling error, grammatical error or a weird translation in your language, please join [our CrowdIn](https://crowdin.com/project/firefly-iii) project. There, you can submit your translations and fixes. The GitHub repository will download these automatically and they will be included in the next release.
+[Contributing guidelines](https://docs.firefly-iii.org/other-pages/contributing)

.github/dependabot.yml

@@ -6,6 +6,7 @@ updates:
     directory: "/" # Location of package manifests
     target-branch: develop
     labels: ["bug"]
+    versioning-strategy: increase
     schedule:
       interval: "weekly"
 
@@ -14,13 +15,14 @@ updates:
     directory: "/"
     target-branch: develop
     labels: ["bug"]
+    versioning-strategy: increase
     schedule:
       interval: "weekly"
 
-  # yarn / JS updates for new frontend
-  - package-ecosystem: "npm"
-    directory: "/frontend"
+  - package-ecosystem: "github-actions"
+    directory: "/" 
     target-branch: develop
     labels: ["bug"]
+    versioning-strategy: increase
     schedule:
       interval: "weekly"

.github/its_you_not_me.md

@@ -0,0 +1,16 @@
+# It's not you, it's me
+
+Sometimes bugs reported to Firefly III are configuration and system problems on the user's side.
+
+If you run into any of the following problems, there's a good chance it's not a Firefly III issue, but a configuration issue.
+
+- ⚠️ Firefly III can't connect to the database when starting or the password is wrong, even though you're sure it's correct.
+- ⚠️ Errors about a missing `APP_KEY` or other encryption/hash problems
+- ⚠️ You can't login due to `419` errors (page expired)
+- ⚠️ Any `500` error when starting Firefly III
+- ⚠️ Any white page when starting Firefly III
+- ⚠️ Time-out when starting Firefly III for the first time
+- ⚠️ Firefly III does not work behind your reverse proxy
+- ⚠️ You can't connect to the Data Importer due to 404's or authentication issues.
+
+If you run into an issue like this, please start a [discussion](https://github.com/firefly-iii/firefly-iii/discussions) or chat on [Gitter.im](https://gitter.im/firefly-iii/firefly-iii). There's a good chance it's not a bug but something we can fix rather quickly :+1:

.github/lock.yml

@@ -1,35 +0,0 @@
-# Configuration for Lock Threads - https://github.com/dessant/lock-threads
-
-# Number of days of inactivity before a closed issue or pull request is locked
-daysUntilLock: 90
-
-# Skip issues and pull requests created before a given timestamp. Timestamp must
-# follow ISO 8601 (`YYYY-MM-DD`). Set to `false` to disable
-skipCreatedBefore: false
-
-# Issues and pull requests with these labels will be ignored. Set to `[]` to disable
-exemptLabels: []
-
-# Label to add before locking, such as `outdated`. Set to `false` to disable
-lockLabel: false
-
-# Comment to post before locking. Set to `false` to disable
-lockComment: false
-
-# Assign `resolved` as the reason for locking. Set to `false` to disable
-setLockReason: true
-
-# Limit to only `issues` or `pulls`
-# only: issues
-
-# Optionally, specify configuration settings just for `issues` or `pulls`
-# issues:
-#   exemptLabels:
-#     - help-wanted
-#   lockLabel: outdated
-
-# pulls:
-#   daysUntilLock: 30
-
-# Repository to extend settings from
-# _extends: repo

.github/mergify.yml

@@ -0,0 +1,8 @@
+pull_request_rules:
+  - name: Close all on main
+    conditions:
+      - base=main
+      - -author~=^dependabot(|-preview)\[bot\]$
+    actions:
+      close:
+        message: Please do not open PR's on the `main` branch, but on the `develop` branch only. Thank you!

.github/pull_request_template.md

@@ -2,8 +2,7 @@
 Before you create a new PR, please consider:
 
 1) Pull requests for the MAIN branch will be closed.
-2) We cannot accept pull requests to add new currencies.
-3) DO NOT include translations in your PR. Only English US sentences.
+2) DO NOT include translations in your PR. Only English US sentences.
 
 Thanks.
 -->

.github/stale.yml

@@ -1,11 +1,11 @@
 # Configuration for probot-stale - https://github.com/probot/stale
 
 # Number of days of inactivity before an Issue or Pull Request becomes stale
-daysUntilStale: 7
+daysUntilStale: 14
 
 # Number of days of inactivity before a stale Issue or Pull Request is closed.
 # Set to false to disable. If disabled, issues still need to be closed manually, but will remain marked as stale.
-daysUntilClose: 7
+daysUntilClose: 14
 
 # Issues or Pull Requests with these labels will never be considered stale. Set to `[]` to disable
 # - "[Status] Maybe Later"

.github/support.md

@@ -1,12 +1,32 @@
-# Welcome to Firefly III on Github!
+# Support [![Average time to resolve an issue](http://isitmaintained.com/badge/resolution/firefly-iii/firefly-iii.svg)](http://isitmaintained.com/project/firefly-iii/firefly-iii "Average time to resolve an issue")
 
 :+1::tada: Thank you for taking the time to contribute something to Firefly III!
 
-## Bugs
+## Reporting an issue
 
-First of all: thank you for reporting a bug instead of ditching the tool altogether. If you find a bug, please take the time and see if the [demo site](https://demo.firefly-iii.org/) is also suffering from this bug. Include as many log files and details as you think are necessary. Bugs have a lot of priority! 
+First of all: thank you for reporting a bug instead of ditching the tool altogether. Bugs have a lot of priority! 
 
-## Installation problems
+1. Open bugs will have open issues, so search for one first.
+2. If your feature request is already there, vote on it with :+1: or :-1: reactions.
+3. Do NOT hijack old issues with the bug you found, open your own issue.
+4. If relevant, take the time and see if the [demo site](https://demo.firefly-iii.org/) is also suffering from your issue.
+5. If relevant, read the [documentation](https://docs.firefly-iii.org/).
 
-Please take the time to read the [documentation](https://docs.firefly-iii.org/) and make sure you search through closed issues for the problems other people
- have had. Your problem may be among them! If not, open an issue and I will help where I can.
+Please follow these guidelines when opening new issues:
+
+## Writing good issues
+
+- File a single issue for a single problem or feature requests. Feel free to open multiple issues.
+- Collect as many details as you can.
+- Be clear and specific, and state what you're not sure about.
+
+Only then [create a new issue](https://github.com/firefly-iii/firefly-iii/issues/new/choose)!
+
+## Issue closure and abandonment policy
+
+- Issues can be converted into discussions if it's not a bug or feature request.
+- Features that won't be implemented will be labelled "wontfix". [This isn't personal](https://docs.firefly-iii.org/firefly-iii/about-firefly-iii/what-its-not/).
+- Issues can be closed if they're duplicates of other issues.
+- Issues can be closed if the answer is in the FAQ.
+- Issues will be closed automatically after 14 days.
+- Issues will be locked automatically after 90 days.

.github/workflows/build.yml

@@ -0,0 +1,21 @@
+name: Sonarcloud CI
+on:
+  push:
+    branches:
+      - main
+      - develop
+  pull_request:
+    types: [opened, synchronize, reopened]
+jobs:
+  sonarcloud:
+    name: SonarCloud
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0  # Shallow clones should be disabled for a better relevancy of analysis
+      - name: SonarCloud Scan
+        uses: SonarSource/sonarcloud-github-action@master
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}  # Needed to get PR information, if any
+          SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}

.github/workflows/lock.yml

@@ -0,0 +1,21 @@
+name: Lock old issues
+
+on:
+  workflow_dispatch:
+  schedule:
+    - cron: '0 0 * * *'
+
+permissions:
+  contents: read
+
+jobs:
+  lock:
+    permissions:
+      issues: write  # for dessant/lock-threads to lock issues
+      pull-requests: write  # for dessant/lock-threads to lock PRs
+    runs-on: ubuntu-latest
+    steps:
+      - uses: dessant/lock-threads@v2
+        with:
+          github-token: ${{ github.token }}
+          issue-lock-inactive-days: '90'

.github/workflows/stale.yml

@@ -0,0 +1,29 @@
+name: "Close stale issues"
+on:
+  schedule:
+    - cron: "30 1 * * *"
+
+permissions:
+  contents: read
+
+jobs:
+  stale:
+    permissions:
+      issues: write  # for actions/stale to close stale issues
+      pull-requests: write  # for actions/stale to close stale PRs
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/stale@v3
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          stale-issue-message: >
+            This issue has been automatically marked as stale because it has not had
+            recent activity. It will be closed if no further activity occurs. Thank you
+            for your contributions.
+          stale-pr-message: >
+            This issue has been automatically marked as stale because it has not had
+            recent activity. It will be closed if no further activity occurs. Thank you
+            for your contributions.
+          days-before-stale: 14
+          days-before-close: 7
+          exempt-issue-labels: 'enhancement,feature,bug,announcement'

.gitignore

@@ -1,17 +1,8 @@
 /node_modules
 /frontend/node_modules
-/frontend/fonts
-/public/hot
-/public/storage
 /storage/*.key
 /vendor
 /.vagrant
-Homestead.json
-Homestead.yaml
 npm-debug.log
 yarn-error.log
 .env
-public/google*.html
-report.html
-composer.phar
-app.js.map

.scrutinizer.yml

@@ -1,58 +0,0 @@
---- 
-build: 
-  nodes: 
-    analysis: 
-      project_setup: 
-        override: true
-      tests: 
-        override: 
-          - php-scrutinizer-run
-checks: 
-  javascript: true
-  php: 
-    align_assignments: true
-    avoid_fixme_comments: true
-    avoid_multiple_statements_on_same_line: true
-    avoid_perl_style_comments: true
-    avoid_todo_comments: true
-    duplication: false
-    encourage_single_quotes: true
-    newline_at_end_of_file: true
-    no_goto: true
-    no_long_variable_names: 
-      maximum: "20"
-    no_short_method_names: 
-      minimum: "3"
-    no_short_variable_names: 
-      minimum: "3"
-    optional_parameters_at_the_end: true
-    parameter_doc_comments: true
-    remove_extra_empty_lines: true
-    return_doc_comment_if_not_inferrable: true
-    return_doc_comments: true
-    uppercase_constants: true
-    use_self_instead_of_fqcn: true
-coding_style: 
-  php: 
-    spaces: 
-      around_operators: 
-        concatenation: true
-      other: 
-        after_type_cast: false
-filter: 
-  excluded_paths: 
-    - database/migrations/*
-    - bootstrap/*
-    - config/*
-    - docker/*
-    - public/js/lib/*
-    - public/lib/adminlte/js/*
-    - public/lib/bootstrap/js/*
-    - resources/*
-    - routes/*
-    - storage/*
-  paths: 
-    - app/*
-    - public/js/ff/*
-tools: 
-  external_code_coverage: false

.travis.yml

@@ -1,21 +0,0 @@
-language: php
-php:
-- '7.4'
-dist: xenial
-os: linux
-cache:
-  directories:
-  - "/home/travis/.config"
-  - "/home/travis/build/firefly-iii/firefly-iii/vendor"
-
-branches:
-  only:
-  - develop
-
-before_script:
-- phpenv config-rm xdebug.ini || return 0
-- composer global require hirak/prestissimo --no-plugins --no-scripts
-
-script:
-- "./.ci/phpstan.sh"
-- "./.ci/phpunit.sh"

app/Api/V1/Controllers/Autocomplete/AccountController.php

@@ -23,15 +23,16 @@ declare(strict_types=1);
 
 namespace FireflyIII\Api\V1\Controllers\Autocomplete;
 
-
 use FireflyIII\Api\V1\Controllers\Controller;
 use FireflyIII\Api\V1\Requests\Autocomplete\AutocompleteRequest;
+use FireflyIII\Exceptions\FireflyException;
 use FireflyIII\Models\Account;
 use FireflyIII\Models\AccountType;
 use FireflyIII\Repositories\Account\AccountRepositoryInterface;
 use FireflyIII\Support\Http\Api\AccountFilter;
 use FireflyIII\User;
 use Illuminate\Http\JsonResponse;
+use JsonException;
 
 /**
  * Class AccountController
@@ -41,10 +42,8 @@ class AccountController extends Controller
     use AccountFilter;
 
     private array                      $balanceTypes;
-
     private AccountRepositoryInterface $repository;
 
-
     /**
      * AccountController constructor.
      */
@@ -65,9 +64,15 @@ class AccountController extends Controller
     }
 
     /**
+     * Documentation for this endpoint:
+     * https://api-docs.firefly-iii.org/#/autocomplete/getAccountsAC
+     *
      * @param AutocompleteRequest $request
      *
      * @return JsonResponse
+     * @throws JsonException
+     * @throws FireflyException
+     * @throws FireflyException
      */
     public function accounts(AutocompleteRequest $request): JsonResponse
     {
@@ -76,16 +81,14 @@ class AccountController extends Controller
         $query = $data['query'];
         $date  = $data['date'] ?? today(config('app.timezone'));
 
-        /** @var AccountRepositoryInterface $repository */
-        $repository      = app(AccountRepositoryInterface::class);
         $return          = [];
-        $result          = $repository->searchAccount((string) $query, $types, $data['limit']);
+        $result          = $this->repository->searchAccount((string) $query, $types, $data['limit']);
         $defaultCurrency = app('amount')->getDefaultCurrency();
 
         /** @var Account $account */
         foreach ($result as $account) {
             $nameWithBalance = $account->name;
-            $currency        = $repository->getAccountCurrency($account) ?? $defaultCurrency;
+            $currency        = $this->repository->getAccountCurrency($account) ?? $defaultCurrency;
 
             if (in_array($account->accountType->type, $this->balanceTypes, true)) {
                 $balance         = app('steam')->balance($account, $date);
@@ -93,26 +96,28 @@ class AccountController extends Controller
             }
 
             $return[] = [
-                'id'                      => $account->id,
+                'id'                      => (string) $account->id,
                 'name'                    => $account->name,
                 'name_with_balance'       => $nameWithBalance,
                 'type'                    => $account->accountType->type,
                 'currency_id'             => $currency->id,
                 'currency_name'           => $currency->name,
                 'currency_code'           => $currency->code,
+                'currency_symbol'         => $currency->symbol,
                 'currency_decimal_places' => $currency->decimal_places,
             ];
         }
 
         // custom order.
         $order = [AccountType::ASSET, AccountType::REVENUE, AccountType::EXPENSE];
-
-
-        usort($return, function ($a, $b) use ($order) {
+        usort(
+            $return, function ($a, $b) use ($order) {
             $pos_a = array_search($a['type'], $order);
             $pos_b = array_search($b['type'], $order);
+
             return $pos_a - $pos_b;
-        });
+        }
+        );
 
         return response()->json($return);
     }

app/Api/V1/Controllers/Autocomplete/BillController.php

@@ -23,7 +23,6 @@ declare(strict_types=1);
 
 namespace FireflyIII\Api\V1\Controllers\Autocomplete;
 
-
 use FireflyIII\Api\V1\Controllers\Controller;
 use FireflyIII\Api\V1\Requests\Autocomplete\AutocompleteRequest;
 use FireflyIII\Models\Bill;
@@ -38,7 +37,6 @@ class BillController extends Controller
 {
     private BillRepositoryInterface $repository;
 
-
     /**
      * BillController constructor.
      */
@@ -58,7 +56,9 @@ class BillController extends Controller
     }
 
     /**
-     * TODO add limit
+     * Documentation for this endpoint is at:
+     * https://api-docs.firefly-iii.org/#/autocomplete/getBillsAC
+     *
      * @param AutocompleteRequest $request
      *
      * @return JsonResponse
@@ -70,13 +70,12 @@ class BillController extends Controller
         $filtered = $result->map(
             static function (Bill $item) {
                 return [
-                    'id'   => $item->id,
+                    'id'   => (string) $item->id,
                     'name' => $item->name,
                 ];
             }
         );
 
-
         return response()->json($filtered->toArray());
     }
 

app/Api/V1/Controllers/Autocomplete/BudgetController.php

@@ -23,7 +23,6 @@ declare(strict_types=1);
 
 namespace FireflyIII\Api\V1\Controllers\Autocomplete;
 
-
 use FireflyIII\Api\V1\Controllers\Controller;
 use FireflyIII\Api\V1\Requests\Autocomplete\AutocompleteRequest;
 use FireflyIII\Models\Budget;
@@ -38,7 +37,6 @@ class BudgetController extends Controller
 {
     private BudgetRepositoryInterface $repository;
 
-
     /**
      * BudgetController constructor.
      */
@@ -58,7 +56,9 @@ class BudgetController extends Controller
     }
 
     /**
-     * TODO add limit
+     * Documentation for this endpoint is at:
+     * https://api-docs.firefly-iii.org/#/autocomplete/getBudgetsAC
+     *
      * @param AutocompleteRequest $request
      *
      * @return JsonResponse
@@ -70,7 +70,7 @@ class BudgetController extends Controller
         $filtered = $result->map(
             static function (Budget $item) {
                 return [
-                    'id'   => $item->id,
+                    'id'   => (string) $item->id,
                     'name' => $item->name,
                 ];
             }

app/Api/V1/Controllers/Autocomplete/CategoryController.php

@@ -37,7 +37,6 @@ class CategoryController extends Controller
 {
     private CategoryRepositoryInterface $repository;
 
-
     /**
      * CategoryController constructor.
      */
@@ -57,6 +56,9 @@ class CategoryController extends Controller
     }
 
     /**
+     * Documentation for this endpoint is at:
+     * https://api-docs.firefly-iii.org/#/autocomplete/getCategoriesAC
+     *
      * @param AutocompleteRequest $request
      *
      * @return JsonResponse
@@ -68,7 +70,7 @@ class CategoryController extends Controller
         $filtered = $result->map(
             static function (Category $item) {
                 return [
-                    'id'   => $item->id,
+                    'id'   => (string) $item->id,
                     'name' => $item->name,
                 ];
             }

app/Api/V1/Controllers/Autocomplete/CurrencyController.php

@@ -23,7 +23,6 @@ declare(strict_types=1);
 
 namespace FireflyIII\Api\V1\Controllers\Autocomplete;
 
-
 use FireflyIII\Api\V1\Controllers\Controller;
 use FireflyIII\Api\V1\Requests\Autocomplete\AutocompleteRequest;
 use FireflyIII\Models\TransactionCurrency;
@@ -38,7 +37,6 @@ class CurrencyController extends Controller
 {
     private CurrencyRepositoryInterface $repository;
 
-
     /**
      * CurrencyController constructor.
      */
@@ -58,11 +56,14 @@ class CurrencyController extends Controller
     }
 
     /**
+     * Documentation for this endpoint is at:
+     * https://api-docs.firefly-iii.org/#/autocomplete/getCurrenciesAC
+     *
      * @param AutocompleteRequest $request
      *
      * @return JsonResponse
      */
-    public function currenciesWithCode(AutocompleteRequest $request): JsonResponse
+    public function currencies(AutocompleteRequest $request): JsonResponse
     {
         $data       = $request->getData();
         $collection = $this->repository->searchCurrency($data['query'], $data['limit']);
@@ -71,8 +72,8 @@ class CurrencyController extends Controller
         /** @var TransactionCurrency $currency */
         foreach ($collection as $currency) {
             $result[] = [
-                'id'             => $currency->id,
-                'name'           => sprintf('%s (%s)', $currency->name, $currency->code),
+                'id'             => (string) $currency->id,
+                'name'           => $currency->name,
                 'code'           => $currency->code,
                 'symbol'         => $currency->symbol,
                 'decimal_places' => $currency->decimal_places,
@@ -83,21 +84,25 @@ class CurrencyController extends Controller
     }
 
     /**
+     * Documentation for this endpoint is at:
+     * https://api-docs.firefly-iii.org/#/autocomplete/getCurrenciesCodeAC
+     *
      * @param AutocompleteRequest $request
      *
      * @return JsonResponse
+     * @deprecated
      */
-    public function currencies(AutocompleteRequest $request): JsonResponse
+    public function currenciesWithCode(AutocompleteRequest $request): JsonResponse
     {
-        $data   = $request->getData();
+        $data       = $request->getData();
         $collection = $this->repository->searchCurrency($data['query'], $data['limit']);
         $result     = [];
 
         /** @var TransactionCurrency $currency */
         foreach ($collection as $currency) {
             $result[] = [
-                'id'             => $currency->id,
-                'name'           => $currency->name,
+                'id'             => (string) $currency->id,
+                'name'           => sprintf('%s (%s)', $currency->name, $currency->code),
                 'code'           => $currency->code,
                 'symbol'         => $currency->symbol,
                 'decimal_places' => $currency->decimal_places,

app/Api/V1/Controllers/Autocomplete/ObjectGroupController.php

@@ -23,7 +23,6 @@ declare(strict_types=1);
 
 namespace FireflyIII\Api\V1\Controllers\Autocomplete;
 
-
 use FireflyIII\Api\V1\Controllers\Controller;
 use FireflyIII\Api\V1\Requests\Autocomplete\AutocompleteRequest;
 use FireflyIII\Models\ObjectGroup;
@@ -38,7 +37,6 @@ class ObjectGroupController extends Controller
 {
     private ObjectGroupRepositoryInterface $repository;
 
-
     /**
      * CurrencyController constructor.
      */
@@ -58,6 +56,9 @@ class ObjectGroupController extends Controller
     }
 
     /**
+     * Documentation for this endpoint is at:
+     * https://api-docs.firefly-iii.org/#/autocomplete/getObjectGroupsAC
+     *
      * @param AutocompleteRequest $request
      *
      * @return JsonResponse
@@ -68,10 +69,10 @@ class ObjectGroupController extends Controller
         $return = [];
         $result = $this->repository->search($data['query'], $data['limit']);
 
-        /** @var ObjectGroup $account */
+        /** @var ObjectGroup $objectGroup */
         foreach ($result as $objectGroup) {
             $return[] = [
-                'id'    => $objectGroup->id,
+                'id'    => (string) $objectGroup->id,
                 'name'  => $objectGroup->title,
                 'title' => $objectGroup->title,
             ];

app/Api/V1/Controllers/Autocomplete/PiggyBankController.php

@@ -23,7 +23,6 @@ declare(strict_types=1);
 
 namespace FireflyIII\Api\V1\Controllers\Autocomplete;
 
-
 use FireflyIII\Api\V1\Controllers\Controller;
 use FireflyIII\Api\V1\Requests\Autocomplete\AutocompleteRequest;
 use FireflyIII\Models\PiggyBank;
@@ -37,10 +36,8 @@ use Illuminate\Http\JsonResponse;
  */
 class PiggyBankController extends Controller
 {
-    private PiggyBankRepositoryInterface $piggyRepository;
-
     private AccountRepositoryInterface   $accountRepository;
-
+    private PiggyBankRepositoryInterface $piggyRepository;
 
     /**
      * PiggyBankController constructor.
@@ -63,6 +60,9 @@ class PiggyBankController extends Controller
     }
 
     /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/autocomplete/getPiggiesAC
+     *
      * @param AutocompleteRequest $request
      *
      * @return JsonResponse
@@ -76,13 +76,14 @@ class PiggyBankController extends Controller
 
         /** @var PiggyBank $piggy */
         foreach ($piggies as $piggy) {
-            $currency           = $this->accountRepository->getAccountCurrency($piggy->account) ?? $defaultCurrency;
+            $currency   = $this->accountRepository->getAccountCurrency($piggy->account) ?? $defaultCurrency;
             $response[] = [
-                'id'                      => $piggy->id,
+                'id'                      => (string) $piggy->id,
                 'name'                    => $piggy->name,
                 'currency_id'             => $currency->id,
                 'currency_name'           => $currency->name,
                 'currency_code'           => $currency->code,
+                'currency_symbol'         => $currency->symbol,
                 'currency_decimal_places' => $currency->decimal_places,
             ];
         }
@@ -91,6 +92,9 @@ class PiggyBankController extends Controller
     }
 
     /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/autocomplete/getPiggiesBalanceAC
+     *
      * @param AutocompleteRequest $request
      *
      * @return JsonResponse
@@ -103,10 +107,10 @@ class PiggyBankController extends Controller
         $response        = [];
         /** @var PiggyBank $piggy */
         foreach ($piggies as $piggy) {
-            $currency           = $this->accountRepository->getAccountCurrency($piggy->account) ?? $defaultCurrency;
-            $currentAmount      = $this->piggyRepository->getRepetition($piggy)->currentamount ?? '0';
-            $response[] = [
-                'id'                      => $piggy->id,
+            $currency      = $this->accountRepository->getAccountCurrency($piggy->account) ?? $defaultCurrency;
+            $currentAmount = $this->piggyRepository->getRepetition($piggy)->currentamount ?? '0';
+            $response[]    = [
+                'id'                      => (string) $piggy->id,
                 'name'                    => $piggy->name,
                 'name_with_balance'       => sprintf(
                     '%s (%s / %s)', $piggy->name, app('amount')->formatAnything($currency, $currentAmount, false),
@@ -115,6 +119,7 @@ class PiggyBankController extends Controller
                 'currency_id'             => $currency->id,
                 'currency_name'           => $currency->name,
                 'currency_code'           => $currency->code,
+                'currency_symbol'         => $currency->symbol,
                 'currency_decimal_places' => $currency->decimal_places,
             ];
         }

app/Api/V1/Controllers/Autocomplete/RecurrenceController.php

@@ -23,13 +23,59 @@ declare(strict_types=1);
 
 namespace FireflyIII\Api\V1\Controllers\Autocomplete;
 
-
 use FireflyIII\Api\V1\Controllers\Controller;
+use FireflyIII\Api\V1\Requests\Autocomplete\AutocompleteRequest;
+use FireflyIII\Models\Recurrence;
+use FireflyIII\Repositories\Recurring\RecurringRepositoryInterface;
+use Illuminate\Http\JsonResponse;
 
 /**
  * Class RecurrenceController
  */
 class RecurrenceController extends Controller
 {
+    private RecurringRepositoryInterface $repository;
+
+    /**
+     * RecurrenceController constructor.
+     */
+    public function __construct()
+    {
+        parent::__construct();
+        $this->middleware(
+            function ($request, $next) {
+                $this->repository = app(RecurringRepositoryInterface::class);
+                $this->repository->setUser(auth()->user());
+
+                return $next($request);
+            }
+        );
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/autocomplete/getRecurringAC
+     *
+     * @param AutocompleteRequest $request
+     *
+     * @return JsonResponse
+     */
+    public function recurring(AutocompleteRequest $request): JsonResponse
+    {
+        $data        = $request->getData();
+        $recurrences = $this->repository->searchRecurrence($data['query'], $data['limit']);
+        $response    = [];
+
+        /** @var Recurrence $recurrence */
+        foreach ($recurrences as $recurrence) {
+            $response[] = [
+                'id'          => (string) $recurrence->id,
+                'name'        => $recurrence->title,
+                'description' => $recurrence->description,
+            ];
+        }
+
+        return response()->json($response);
+    }
 
 }

app/Api/V1/Controllers/Autocomplete/RuleController.php

@@ -23,13 +23,59 @@ declare(strict_types=1);
 
 namespace FireflyIII\Api\V1\Controllers\Autocomplete;
 
-
 use FireflyIII\Api\V1\Controllers\Controller;
+use FireflyIII\Api\V1\Requests\Autocomplete\AutocompleteRequest;
+use FireflyIII\Models\Rule;
+use FireflyIII\Repositories\Rule\RuleRepositoryInterface;
+use Illuminate\Http\JsonResponse;
 
 /**
  * Class RuleController
  */
 class RuleController extends Controller
 {
+    private RuleRepositoryInterface $repository;
+
+    /**
+     * RuleController constructor.
+     */
+    public function __construct()
+    {
+        parent::__construct();
+        $this->middleware(
+            function ($request, $next) {
+                $this->repository = app(RuleRepositoryInterface::class);
+                $this->repository->setUser(auth()->user());
+
+                return $next($request);
+            }
+        );
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/autocomplete/getRulesAC
+     *
+     * @param AutocompleteRequest $request
+     *
+     * @return JsonResponse
+     */
+    public function rules(AutocompleteRequest $request): JsonResponse
+    {
+        $data     = $request->getData();
+        $rules    = $this->repository->searchRule($data['query'], $data['limit']);
+        $response = [];
+
+        /** @var Rule $rule */
+        foreach ($rules as $rule) {
+            $response[] = [
+                'id'          => (string) $rule->id,
+                'name'        => $rule->title,
+                'description' => $rule->description,
+            ];
+        }
+
+        return response()->json($response);
+    }
 
 }

app/Api/V1/Controllers/Autocomplete/RuleGroupController.php

@@ -23,13 +23,58 @@ declare(strict_types=1);
 
 namespace FireflyIII\Api\V1\Controllers\Autocomplete;
 
-
 use FireflyIII\Api\V1\Controllers\Controller;
+use FireflyIII\Api\V1\Requests\Autocomplete\AutocompleteRequest;
+use FireflyIII\Models\RuleGroup;
+use FireflyIII\Repositories\RuleGroup\RuleGroupRepositoryInterface;
+use Illuminate\Http\JsonResponse;
 
 /**
  * Class RuleGroupController
  */
 class RuleGroupController extends Controller
 {
+    private RuleGroupRepositoryInterface $repository;
 
+    /**
+     * RuleGroupController constructor.
+     */
+    public function __construct()
+    {
+        parent::__construct();
+        $this->middleware(
+            function ($request, $next) {
+                $this->repository = app(RuleGroupRepositoryInterface::class);
+                $this->repository->setUser(auth()->user());
+
+                return $next($request);
+            }
+        );
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/autocomplete/getRuleGroupsAC
+     *
+     * @param AutocompleteRequest $request
+     *
+     * @return JsonResponse
+     */
+    public function ruleGroups(AutocompleteRequest $request): JsonResponse
+    {
+        $data     = $request->getData();
+        $groups   = $this->repository->searchRuleGroup($data['query'], $data['limit']);
+        $response = [];
+
+        /** @var RuleGroup $group */
+        foreach ($groups as $group) {
+            $response[] = [
+                'id'          => (string) $group->id,
+                'name'        => $group->title,
+                'description' => $group->description,
+            ];
+        }
+
+        return response()->json($response);
+    }
 }

app/Api/V1/Controllers/Autocomplete/TagController.php

@@ -23,7 +23,6 @@ declare(strict_types=1);
 
 namespace FireflyIII\Api\V1\Controllers\Autocomplete;
 
-
 use FireflyIII\Api\V1\Controllers\Controller;
 use FireflyIII\Api\V1\Requests\Autocomplete\AutocompleteRequest;
 use FireflyIII\Models\Tag;
@@ -38,7 +37,6 @@ class TagController extends Controller
 {
     private TagRepositoryInterface $repository;
 
-
     /**
      * TagController constructor.
      */
@@ -58,6 +56,9 @@ class TagController extends Controller
     }
 
     /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/autocomplete/getTagAC
+     *
      * @param AutocompleteRequest $request
      *
      * @return JsonResponse
@@ -71,7 +72,7 @@ class TagController extends Controller
         /** @var Tag $tag */
         foreach ($result as $tag) {
             $array[] = [
-                'id'   => $tag->id,
+                'id'   => (string) $tag->id,
                 'name' => $tag->tag,
                 'tag'  => $tag->tag,
             ];

app/Api/V1/Controllers/Autocomplete/TransactionController.php

@@ -23,7 +23,6 @@ declare(strict_types=1);
 
 namespace FireflyIII\Api\V1\Controllers\Autocomplete;
 
-
 use FireflyIII\Api\V1\Controllers\Controller;
 use FireflyIII\Api\V1\Requests\Autocomplete\AutocompleteRequest;
 use FireflyIII\Models\TransactionJournal;
@@ -38,10 +37,8 @@ use Illuminate\Support\Collection;
  */
 class TransactionController extends Controller
 {
-    private JournalRepositoryInterface          $repository;
-
     private TransactionGroupRepositoryInterface $groupRepository;
-
+    private JournalRepositoryInterface          $repository;
 
     /**
      * TransactionController constructor.
@@ -63,8 +60,10 @@ class TransactionController extends Controller
         );
     }
 
-
     /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/autocomplete/getTransactionsAC
+     *
      * @param AutocompleteRequest $request
      *
      * @return JsonResponse
@@ -81,8 +80,8 @@ class TransactionController extends Controller
         /** @var TransactionJournal $journal */
         foreach ($filtered as $journal) {
             $array[] = [
-                'id'                   => $journal->id,
-                'transaction_group_id' => $journal->transaction_group_id,
+                'id'                   => (string) $journal->id,
+                'transaction_group_id' => (string) $journal->transaction_group_id,
                 'name'                 => $journal->description,
                 'description'          => $journal->description,
             ];
@@ -92,6 +91,9 @@ class TransactionController extends Controller
     }
 
     /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/autocomplete/getTransactionsIDAC
+     *
      * @param AutocompleteRequest $request
      *
      * @return JsonResponse
@@ -120,8 +122,8 @@ class TransactionController extends Controller
         /** @var TransactionJournal $journal */
         foreach ($result as $journal) {
             $array[] = [
-                'id'                   => $journal->id,
-                'transaction_group_id' => $journal->transaction_group_id,
+                'id'                   => (string) $journal->id,
+                'transaction_group_id' => (string) $journal->transaction_group_id,
                 'name'                 => sprintf('#%d: %s', $journal->transaction_group_id, $journal->description),
                 'description'          => sprintf('#%d: %s', $journal->transaction_group_id, $journal->description),
             ];

app/Api/V1/Controllers/Autocomplete/TransactionTypeController.php

@@ -23,7 +23,6 @@ declare(strict_types=1);
 
 namespace FireflyIII\Api\V1\Controllers\Autocomplete;
 
-
 use FireflyIII\Api\V1\Controllers\Controller;
 use FireflyIII\Api\V1\Requests\Autocomplete\AutocompleteRequest;
 use FireflyIII\Models\TransactionType;
@@ -37,7 +36,6 @@ class TransactionTypeController extends Controller
 {
     private TransactionTypeRepositoryInterface $repository;
 
-
     /**
      * TransactionTypeController constructor.
      */
@@ -54,6 +52,9 @@ class TransactionTypeController extends Controller
     }
 
     /**
+     * This endpoint is documented at
+     * https://api-docs.firefly-iii.org/#/autocomplete/getTransactionTypesAC
+     *
      * @param AutocompleteRequest $request
      *
      * @return JsonResponse
@@ -69,7 +70,7 @@ class TransactionTypeController extends Controller
         foreach ($types as $type) {
             // different key for consistency.
             $array[] = [
-                'id'   => $type->id,
+                'id'   => (string) $type->id,
                 'name' => $type->type,
                 'type' => $type->type,
             ];

app/Api/V1/Controllers/BudgetLimitController.php

@@ -1,260 +0,0 @@
-<?php
-/**
- * BudgetLimitController.php
- * Copyright (c) 2019 james@firefly-iii.org
- *
- * This file is part of Firefly III (https://github.com/firefly-iii).
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as
- * published by the Free Software Foundation, either version 3 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
-
-declare(strict_types=1);
-
-namespace FireflyIII\Api\V1\Controllers;
-
-
-use FireflyIII\Api\V1\Requests\BudgetLimitRequest;
-use FireflyIII\Exceptions\FireflyException;
-use FireflyIII\Helpers\Collector\GroupCollectorInterface;
-use FireflyIII\Models\BudgetLimit;
-use FireflyIII\Repositories\Budget\BudgetLimitRepositoryInterface;
-use FireflyIII\Repositories\Budget\BudgetRepositoryInterface;
-use FireflyIII\Support\Http\Api\TransactionFilter;
-use FireflyIII\Transformers\BudgetLimitTransformer;
-use FireflyIII\Transformers\TransactionGroupTransformer;
-use FireflyIII\User;
-use Illuminate\Http\JsonResponse;
-use Illuminate\Http\Request;
-use Illuminate\Pagination\LengthAwarePaginator;
-use Illuminate\Support\Collection;
-use League\Fractal\Pagination\IlluminatePaginatorAdapter;
-use League\Fractal\Resource\Collection as FractalCollection;
-use League\Fractal\Resource\Item;
-
-/**
- * Class BudgetLimitController.
- */
-class BudgetLimitController extends Controller
-{
-    use TransactionFilter;
-
-    /** @var BudgetLimitRepositoryInterface */
-    private $blRepository;
-
-    /** @var BudgetRepositoryInterface The budget repository */
-    private $repository;
-
-
-    /**
-     * BudgetLimitController constructor.
-     *
-     * @codeCoverageIgnore
-     */
-    public function __construct()
-    {
-        parent::__construct();
-        $this->middleware(
-            function ($request, $next) {
-                /** @var User $user */
-                $user               = auth()->user();
-                $this->repository   = app(BudgetRepositoryInterface::class);
-                $this->blRepository = app(BudgetLimitRepositoryInterface::class);
-                $this->repository->setUser($user);
-                $this->blRepository->setUser($user);
-
-                return $next($request);
-            }
-        );
-    }
-
-    /**
-     * Remove the specified resource from storage.
-     *
-     * @param BudgetLimit $budgetLimit
-     *
-     * @return JsonResponse
-     * @codeCoverageIgnore
-     */
-    public function delete(BudgetLimit $budgetLimit): JsonResponse
-    {
-        $this->blRepository->destroyBudgetLimit($budgetLimit);
-
-        return response()->json([], 204);
-    }
-
-    /**
-     * Display a listing of the resource.
-     *
-     * @param Request $request
-     *
-     * @return JsonResponse
-     * @codeCoverageIgnore
-     */
-    public function index(Request $request): JsonResponse
-    {
-        $manager  = $this->getManager();
-        $budgetId = (int) ($request->get('budget_id') ?? 0);
-        $budget   = $this->repository->findNull($budgetId);
-        $pageSize = (int) app('preferences')->getForUser(auth()->user(), 'listPageSize', 50)->data;
-        $this->parameters->set('budget_id', $budgetId);
-
-        $collection = new Collection;
-        if (null === $budget) {
-            $collection = $this->blRepository->getAllBudgetLimits($this->parameters->get('start'), $this->parameters->get('end'));
-        }
-        if (null !== $budget) {
-            $collection = $this->blRepository->getBudgetLimits($budget, $this->parameters->get('start'), $this->parameters->get('end'));
-        }
-
-        $count        = $collection->count();
-        $budgetLimits = $collection->slice(($this->parameters->get('page') - 1) * $pageSize, $pageSize);
-        $paginator    = new LengthAwarePaginator($budgetLimits, $count, $pageSize, $this->parameters->get('page'));
-        $paginator->setPath(route('api.v1.budget_limits.index') . $this->buildParams());
-
-        /** @var BudgetLimitTransformer $transformer */
-        $transformer = app(BudgetLimitTransformer::class);
-        $transformer->setParameters($this->parameters);
-
-        $resource = new FractalCollection($budgetLimits, $transformer, 'budget_limits');
-        $resource->setPaginator(new IlluminatePaginatorAdapter($paginator));
-
-        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', 'application/vnd.api+json');
-    }
-
-    /**
-     * Display the specified resource.
-     *
-     * @param BudgetLimit $budgetLimit
-     *
-     * @return JsonResponse
-     * @codeCoverageIgnore
-     */
-    public function show(BudgetLimit $budgetLimit): JsonResponse
-    {
-        $manager = $this->getManager();
-
-        /** @var BudgetLimitTransformer $transformer */
-        $transformer = app(BudgetLimitTransformer::class);
-        $transformer->setParameters($this->parameters);
-
-        $resource = new Item($budgetLimit, $transformer, 'budget_limits');
-
-        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', 'application/vnd.api+json');
-    }
-
-    /**
-     * Store a newly created resource in storage.
-     *
-     * @param BudgetLimitRequest $request
-     *
-     * @return JsonResponse
-     * @throws FireflyException
-     *
-     */
-    public function store(BudgetLimitRequest $request): JsonResponse
-    {
-        $data               = $request->getAll();
-        $data['start_date'] = $data['start'];
-        $data['end_date']   = $data['end'];
-
-        $budgetLimit = $this->blRepository->store($data);
-        $manager     = $this->getManager();
-
-
-        /** @var BudgetLimitTransformer $transformer */
-        $transformer = app(BudgetLimitTransformer::class);
-        $transformer->setParameters($this->parameters);
-
-        $resource = new Item($budgetLimit, $transformer, 'budget_limits');
-
-        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', 'application/vnd.api+json');
-    }
-
-    /**
-     * Show all transactions.
-     *
-     * @param Request     $request
-     * @param BudgetLimit $budgetLimit
-     *
-     * @return JsonResponse
-     * @codeCoverageIgnore
-     */
-    public function transactions(Request $request, BudgetLimit $budgetLimit): JsonResponse
-    {
-        $pageSize = (int) app('preferences')->getForUser(auth()->user(), 'listPageSize', 50)->data;
-        $type     = $request->get('type') ?? 'default';
-        $this->parameters->set('type', $type);
-
-        $types   = $this->mapTransactionTypes($this->parameters->get('type'));
-        $manager = $this->getManager();
-
-        /** @var User $admin */
-        $admin = auth()->user();
-
-        // use new group collector:
-        /** @var GroupCollectorInterface $collector */
-        $collector = app(GroupCollectorInterface::class);
-        $collector
-            ->setUser($admin)
-            // filter on budget.
-            ->setBudget($budgetLimit->budget)
-            // all info needed for the API:
-            ->withAPIInformation()
-            // set page size:
-            ->setLimit($pageSize)
-            // set page to retrieve
-            ->setPage($this->parameters->get('page'))
-            // set types of transactions to return.
-            ->setTypes($types);
-
-        $collector->setRange($budgetLimit->start_date, $budgetLimit->end_date);
-        $collector->setTypes($types);
-        $paginator = $collector->getPaginatedGroups();
-        $paginator->setPath(route('api.v1.budget_limits.transactions', [$budgetLimit->id]) . $this->buildParams());
-        $transactions = $paginator->getCollection();
-
-        /** @var TransactionGroupTransformer $transformer */
-        $transformer = app(TransactionGroupTransformer::class);
-        $transformer->setParameters($this->parameters);
-
-        $resource = new FractalCollection($transactions, $transformer, 'transactions');
-        $resource->setPaginator(new IlluminatePaginatorAdapter($paginator));
-
-        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', 'application/vnd.api+json');
-    }
-
-    /**
-     * Update the specified resource in storage.
-     *
-     * @param BudgetLimitRequest $request
-     * @param BudgetLimit        $budgetLimit
-     *
-     * @return JsonResponse
-     */
-    public function update(BudgetLimitRequest $request, BudgetLimit $budgetLimit): JsonResponse
-    {
-        $data           = $request->getAll();
-        $budgetLimit    = $this->blRepository->update($budgetLimit, $data);
-        $manager        = $this->getManager();
-
-        /** @var BudgetLimitTransformer $transformer */
-        $transformer = app(BudgetLimitTransformer::class);
-        $transformer->setParameters($this->parameters);
-
-        $resource = new Item($budgetLimit, $transformer, 'budget_limits');
-
-        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', 'application/vnd.api+json');
-
-    }
-}

app/Api/V1/Controllers/Chart/AccountController.php

@@ -26,15 +26,18 @@ namespace FireflyIII\Api\V1\Controllers\Chart;
 
 use Carbon\Carbon;
 use FireflyIII\Api\V1\Controllers\Controller;
-use FireflyIII\Api\V1\Requests\DateRequest;
+use FireflyIII\Api\V1\Requests\Data\DateRequest;
+use FireflyIII\Exceptions\FireflyException;
 use FireflyIII\Models\Account;
 use FireflyIII\Models\AccountType;
-use FireflyIII\Models\TransactionCurrency;
 use FireflyIII\Repositories\Account\AccountRepositoryInterface;
 use FireflyIII\Repositories\Currency\CurrencyRepositoryInterface;
 use FireflyIII\Support\Http\Api\ApiSupport;
 use FireflyIII\User;
 use Illuminate\Http\JsonResponse;
+use JsonException;
+use Psr\Container\ContainerExceptionInterface;
+use Psr\Container\NotFoundExceptionInterface;
 
 /**
  * Class AccountController
@@ -44,9 +47,7 @@ class AccountController extends Controller
     use ApiSupport;
 
     private CurrencyRepositoryInterface $currencyRepository;
-
-    private AccountRepositoryInterface $repository;
-
+    private AccountRepositoryInterface  $repository;
 
     /**
      * AccountController constructor.
@@ -72,95 +73,16 @@ class AccountController extends Controller
     }
 
     /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/charts/getChartAccountOverview
+     *
      * @param DateRequest $request
      *
      * @return JsonResponse
-     */
-    public function expenseOverview(DateRequest $request): JsonResponse
-    {
-        // parameters for chart:
-        $dates = $request->getAll();
-        /** @var Carbon $start */
-        $start = $dates['start'];
-        /** @var Carbon $end */
-        $end = $dates['end'];
-
-        $start->subDay();
-
-        // prep some vars:
-        $currencies = [];
-        $chartData  = [];
-        $tempData   = [];
-
-        // grab all accounts and names
-        $accounts      = $this->repository->getAccountsByType([AccountType::EXPENSE]);
-        $accountNames  = $this->extractNames($accounts);
-        $startBalances = app('steam')->balancesPerCurrencyByAccounts($accounts, $start);
-        $endBalances   = app('steam')->balancesPerCurrencyByAccounts($accounts, $end);
-
-        // loop the end balances. This is an array for each account ($expenses)
-        foreach ($endBalances as $accountId => $expenses) {
-            $accountId = (int) $accountId;
-            // loop each expense entry (each entry can be a different currency).
-            foreach ($expenses as $currencyId => $endAmount) {
-                $currencyId = (int) $currencyId;
-
-                // see if there is an accompanying start amount.
-                // grab the difference and find the currency.
-                $startAmount             = $startBalances[$accountId][$currencyId] ?? '0';
-                $diff                    = bcsub($endAmount, $startAmount);
-                $currencies[$currencyId] = $currencies[$currencyId] ?? $this->currencyRepository->findNull($currencyId);
-                if (0 !== bccomp($diff, '0')) {
-                    // store the values in a temporary array.
-                    $tempData[] = [
-                        'name'        => $accountNames[$accountId],
-                        'difference'  => $diff,
-                        'diff_float'  => (float) $diff,
-                        'currency_id' => $currencyId,
-                    ];
-                }
-            }
-        }
-
-        // sort temp array by amount.
-        $amounts = array_column($tempData, 'diff_float');
-        array_multisort($amounts, SORT_DESC, $tempData);
-
-        // loop all found currencies and build the data array for the chart.
-        /**
-         * @var int                 $currencyId
-         * @var TransactionCurrency $currency
-         */
-        foreach ($currencies as $currencyId => $currency) {
-            $currentSet             = [
-                'label'                   => trans('firefly.box_spent_in_currency', ['currency' => $currency->symbol]),
-                'currency_id'             => $currency->id,
-                'currency_code'           => $currency->code,
-                'currency_symbol'         => $currency->symbol,
-                'currency_decimal_places' => $currency->decimal_places,
-                'type'                    => 'bar', // line, area or bar
-                'yAxisID'                 => 0, // 0, 1, 2
-                'entries'                 => $this->expandNames($tempData),
-            ];
-            $chartData[$currencyId] = $currentSet;
-        }
-
-        // loop temp data and place data in correct array:
-        foreach ($tempData as $entry) {
-            $currencyId                               = $entry['currency_id'];
-            $name                                     = $entry['name'];
-            $chartData[$currencyId]['entries'][$name] = round($entry['difference'], $chartData[$currencyId]['currency_decimal_places']);
-        }
-        $chartData = array_values($chartData);
-
-        return response()->json($chartData);
-    }
-
-
-    /**
-     * @param DateRequest $request
-     *
-     * @return JsonResponse
+     * @throws FireflyException
+     * @throws JsonException
+     * @throws ContainerExceptionInterface
+     * @throws NotFoundExceptionInterface
      */
     public function overview(DateRequest $request): JsonResponse
     {
@@ -175,12 +97,12 @@ class AccountController extends Controller
         $defaultSet = $this->repository->getAccountsByType([AccountType::ASSET])->pluck('id')->toArray();
         $frontPage  = app('preferences')->get('frontPageAccounts', $defaultSet);
         $default    = app('amount')->getDefaultCurrency();
-        // @codeCoverageIgnoreStart
-        if (0 === count($frontPage->data)) {
+
+        if (empty($frontPage->data)) {
             $frontPage->data = $defaultSet;
             $frontPage->save();
         }
-        // @codeCoverageIgnoreEnd
+
 
         // get accounts:
         $accounts  = $this->repository->getAccountsById($frontPage->data);
@@ -189,28 +111,27 @@ class AccountController extends Controller
         foreach ($accounts as $account) {
             $currency = $this->repository->getAccountCurrency($account);
             if (null === $currency) {
-                $currency = $default; // @codeCoverageIgnore
+                $currency = $default;
             }
-            $currentSet = [
+            $currentSet   = [
                 'label'                   => $account->name,
-                'currency_id'             => $currency->id,
+                'currency_id'             => (string) $currency->id,
                 'currency_code'           => $currency->code,
                 'currency_symbol'         => $currency->symbol,
                 'currency_decimal_places' => $currency->decimal_places,
-                'start_date'              => $start->format('Y-m-d'),
-                'end_date'                => $end->format('Y-m-d'),
+                'start_date'              => $start->toAtomString(),
+                'end_date'                => $end->toAtomString(),
                 'type'                    => 'line', // line, area or bar
                 'yAxisID'                 => 0, // 0, 1, 2
                 'entries'                 => [],
             ];
-            /** @var Carbon $currentStart */
             $currentStart = clone $start;
             $range        = app('steam')->balanceInRange($account, $start, clone $end);
-            $previous     = round(array_values($range)[0], 12);
+            $previous     = round((float) array_values($range)[0], 12);
             while ($currentStart <= $end) {
                 $format   = $currentStart->format('Y-m-d');
-                $label    = $currentStart->format('Y-m-d');
-                $balance  = array_key_exists($format, $range) ? round($range[$format], 12) : $previous;
+                $label    = $currentStart->toAtomString();
+                $balance  = array_key_exists($format, $range) ? round((float) $range[$format], 12) : $previous;
                 $previous = $balance;
                 $currentStart->addDay();
                 $currentSet['entries'][$label] = $balance;
@@ -220,91 +141,4 @@ class AccountController extends Controller
 
         return response()->json($chartData);
     }
-
-    /**
-     * @param DateRequest $request
-     *
-     * @return JsonResponse
-     */
-    public function revenueOverview(DateRequest $request): JsonResponse
-    {
-        // parameters for chart:
-        $dates = $request->getAll();
-        /** @var Carbon $start */
-        $start = $dates['start'];
-        /** @var Carbon $end */
-        $end = $dates['end'];
-
-        $start->subDay();
-
-        // prep some vars:
-        $currencies = [];
-        $chartData  = [];
-        $tempData   = [];
-
-        // grab all accounts and names
-        $accounts      = $this->repository->getAccountsByType([AccountType::REVENUE]);
-        $accountNames  = $this->extractNames($accounts);
-        $startBalances = app('steam')->balancesPerCurrencyByAccounts($accounts, $start);
-        $endBalances   = app('steam')->balancesPerCurrencyByAccounts($accounts, $end);
-
-        // loop the end balances. This is an array for each account ($expenses)
-        foreach ($endBalances as $accountId => $expenses) {
-            $accountId = (int) $accountId;
-            // loop each expense entry (each entry can be a different currency).
-            foreach ($expenses as $currencyId => $endAmount) {
-                $currencyId = (int) $currencyId;
-
-                // see if there is an accompanying start amount.
-                // grab the difference and find the currency.
-                $startAmount             = $startBalances[$accountId][$currencyId] ?? '0';
-                $diff                    = bcsub($endAmount, $startAmount);
-                $currencies[$currencyId] = $currencies[$currencyId] ?? $this->currencyRepository->findNull($currencyId);
-                if (0 !== bccomp($diff, '0')) {
-                    // store the values in a temporary array.
-                    $tempData[] = [
-                        'name'        => $accountNames[$accountId],
-                        'difference'  => bcmul($diff, '-1'),
-                        //  For some reason this line is never covered in code coverage:
-                        'diff_float'  => ((float) $diff) * -1, // @codeCoverageIgnore
-                        'currency_id' => $currencyId,
-                    ];
-                }
-            }
-        }
-
-        // sort temp array by amount.
-        $amounts = array_column($tempData, 'diff_float');
-        array_multisort($amounts, SORT_DESC, $tempData);
-
-        // loop all found currencies and build the data array for the chart.
-        /**
-         * @var int                 $currencyId
-         * @var TransactionCurrency $currency
-         */
-        foreach ($currencies as $currencyId => $currency) {
-            $currentSet             = [
-                'label'                   => trans('firefly.box_earned_in_currency', ['currency' => $currency->symbol]),
-                'currency_id'             => $currency->id,
-                'currency_code'           => $currency->code,
-                'currency_symbol'         => $currency->symbol,
-                'currency_decimal_places' => $currency->decimal_places,
-                'type'                    => 'bar', // line, area or bar
-                'yAxisID'                 => 0, // 0, 1, 2
-                'entries'                 => $this->expandNames($tempData),
-            ];
-            $chartData[$currencyId] = $currentSet;
-        }
-
-        // loop temp data and place data in correct array:
-        foreach ($tempData as $entry) {
-            $currencyId                               = $entry['currency_id'];
-            $name                                     = $entry['name'];
-            $chartData[$currencyId]['entries'][$name] = round($entry['difference'], $chartData[$currencyId]['currency_decimal_places']);
-        }
-        $chartData = array_values($chartData);
-
-        return response()->json($chartData);
-    }
-
 }

app/Api/V1/Controllers/Chart/AvailableBudgetController.php

@@ -1,116 +0,0 @@
-<?php
-
-/**
- * AvailableBudgetController.php
- * Copyright (c) 2019 james@firefly-iii.org
- *
- * This file is part of Firefly III (https://github.com/firefly-iii).
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as
- * published by the Free Software Foundation, either version 3 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
-
-declare(strict_types=1);
-
-namespace FireflyIII\Api\V1\Controllers\Chart;
-
-
-use FireflyIII\Api\V1\Controllers\Controller;
-use FireflyIII\Models\AvailableBudget;
-use FireflyIII\Repositories\Budget\BudgetRepositoryInterface;
-use FireflyIII\Repositories\Budget\OperationsRepositoryInterface;
-use FireflyIII\User;
-use Illuminate\Http\JsonResponse;
-use Illuminate\Support\Collection;
-
-/**
- * Class AvailableBudgetController
- */
-class AvailableBudgetController extends Controller
-{
-    private OperationsRepositoryInterface $opsRepository;
-    private BudgetRepositoryInterface     $repository;
-
-    /**
-     * AvailableBudgetController constructor.
-     *
-     * @codeCoverageIgnore
-     */
-    public function __construct()
-    {
-        parent::__construct();
-        $this->middleware(
-            function ($request, $next) {
-                /** @var User $user */
-                $user                = auth()->user();
-                $this->repository    = app(BudgetRepositoryInterface::class);
-                $this->opsRepository = app(OperationsRepositoryInterface::class);
-                $this->repository->setUser($user);
-                $this->opsRepository->setUser($user);
-
-                return $next($request);
-            }
-        );
-    }
-
-    /**
-     * @param AvailableBudget $availableBudget
-     *
-     * @return JsonResponse
-     */
-    public function overview(AvailableBudget $availableBudget): JsonResponse
-    {
-        $currency             = $availableBudget->transactionCurrency;
-        $budgets              = $this->repository->getActiveBudgets();
-        $newBudgetInformation = $this->opsRepository->sumExpenses($availableBudget->start_date, $availableBudget->end_date, null, $budgets);
-        $spent                = '0';
-
-        foreach ($newBudgetInformation as $currencyId => $info) {
-            if ($currencyId === (int) $availableBudget->transaction_currency_id) {
-                $spent = $info['sum'];
-            }
-        }
-
-        $left = bcadd($availableBudget->amount, $spent);
-        // left less than zero? Set to zero.
-        if (-1 === bccomp($left, '0')) {
-            $left = '0';
-        }
-
-        $chartData = [
-            [
-                'label'                   => trans('firefly.spent'),
-                'currency_id'             => $currency->id,
-                'currency_code'           => $currency->code,
-                'currency_symbol'         => $currency->symbol,
-                'currency_decimal_places' => $currency->decimal_places,
-                'type'                    => 'pie',
-                'yAxisID'                 => 0, // 0, 1, 2
-                'entries'                 => [$spent * -1],
-            ],
-            [
-                'label'                   => trans('firefly.left'),
-                'currency_id'             => $currency->id,
-                'currency_code'           => $currency->code,
-                'currency_symbol'         => $currency->symbol,
-                'currency_decimal_places' => $currency->decimal_places,
-                'type'                    => 'line', // line, area or bar
-                'yAxisID'                 => 0, // 0, 1, 2
-                'entries'                 => [round($left, $currency->decimal_places)],
-            ],
-        ];
-
-        return response()->json($chartData);
-    }
-
-}

app/Api/V1/Controllers/Chart/BudgetController.php

@@ -1,301 +0,0 @@
-<?php
-/**
- * BudgetController.php
- * Copyright (c) 2020 james@firefly-iii.org
- *
- * This file is part of Firefly III (https://github.com/firefly-iii).
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as
- * published by the Free Software Foundation, either version 3 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
-
-declare(strict_types=1);
-
-namespace FireflyIII\Api\V1\Controllers\Chart;
-
-
-use Carbon\Carbon;
-use FireflyIII\Api\V1\Controllers\Controller;
-use FireflyIII\Api\V1\Requests\DateRequest;
-use FireflyIII\Models\Budget;
-use FireflyIII\Models\BudgetLimit;
-use FireflyIII\Repositories\Budget\BudgetLimitRepositoryInterface;
-use FireflyIII\Repositories\Budget\BudgetRepositoryInterface;
-use FireflyIII\Repositories\Budget\OperationsRepositoryInterface;
-use Illuminate\Http\JsonResponse;
-use Illuminate\Support\Collection;
-
-/**
- * Class BudgetController
- */
-class BudgetController extends Controller
-{
-    private BudgetLimitRepositoryInterface $blRepository;
-
-    private OperationsRepositoryInterface  $opsRepository;
-
-    private BudgetRepositoryInterface      $repository;
-
-
-    /**
-     * BudgetController constructor.
-     *
-     * @codeCoverageIgnore
-     */
-    public function __construct()
-    {
-        parent::__construct();
-
-        $this->middleware(
-            function ($request, $next) {
-                //$this->generator     = app(GeneratorInterface::class);
-                $this->repository    = app(BudgetRepositoryInterface::class);
-                $this->opsRepository = app(OperationsRepositoryInterface::class);
-                $this->blRepository  = app(BudgetLimitRepositoryInterface::class);
-
-                //$this->nbRepository  = app(NoBudgetRepositoryInterface::class);
-
-                return $next($request);
-            }
-        );
-    }
-
-    /**
-     * [
-     *   'label'                   => 'label for entire set'
-     *   'currency_id'             => 0,
-     *   'currency_code'           => 'EUR',
-     *   'currency_symbol'         => '$',
-     *   'currency_decimal_places' => 2,
-     *   'type'                    => 'bar', // line, area or bar
-     *   'yAxisID'                 => 0, // 0, 1, 2
-     *   'entries'                 => ['a' => 1, 'b' => 4],
-     * ],
-     *
-     * @param DateRequest $request
-     *
-     * @return JsonResponse
-     */
-    public function overview(DateRequest $request): JsonResponse
-    {
-        $dates         = $request->getAll();
-        $budgets       = $this->repository->getActiveBudgets();
-        $budgetNames   = [];
-        $currencyNames = [];
-        $sets          = [];
-        /** @var Budget $budget */
-        foreach ($budgets as $budget) {
-            $expenses = $this->getExpenses($budget, $dates['start'], $dates['end']);
-            $expenses = $this->filterNulls($expenses);
-            foreach ($expenses as $set) {
-                $budgetNames[]   = $set['budget_name'];
-                $currencyNames[] = $set['currency_name'];
-                $sets[]          = $set;
-            }
-        }
-        $budgetNames   = array_unique($budgetNames);
-        $currencyNames = array_unique($currencyNames);
-        $basic         = $this->createSets($budgetNames, $currencyNames);
-        $filled        = $this->fillSets($basic, $sets);
-        $keys          = array_values($filled);
-
-        return response()->json($keys);
-    }
-
-    /**
-     * @param Collection $limits
-     * @param Carbon     $start
-     * @param Carbon     $end
-     *
-     * @return array
-     */
-    protected function getExpenses(Budget $budget, Carbon $start, Carbon $end): array
-    {
-        $limits = $this->blRepository->getBudgetLimits($budget, $start, $end);
-        if (0 === $limits->count()) {
-            return $this->getExpenseInRange($budget, $start, $end);
-        }
-        $arr = [];
-        /** @var BudgetLimit $limit */
-        foreach ($limits as $limit) {
-            $arr[] = $this->getExpensesForLimit($limit);
-        }
-
-        return $arr;
-    }
-
-    /**
-     * @param array $budgetNames
-     * @param array $currencyNames
-     *
-     * @return array
-     */
-    private function createSets(array $budgetNames, array $currencyNames): array
-    {
-        $return = [];
-        foreach ($currencyNames as $currencyName) {
-            $entries = [];
-            foreach ($budgetNames as $budgetName) {
-                $label           = sprintf('%s (%s)', $budgetName, $currencyName);
-                $entries[$label] = '0';
-            }
-
-            // left
-            $return['left'] = [
-                'label'         => sprintf('%s (%s)', trans('firefly.left'), $currencyName),
-                'data_type'     => 'left',
-                'currency_name' => $currencyName,
-                'type'          => 'bar',
-                'yAxisID'       => 0, // 0, 1, 2
-                'entries'       => $entries,
-            ];
-
-            // spent_capped
-            $return['spent_capped'] = [
-                'label'         => sprintf('%s (%s)', trans('firefly.spent'), $currencyName),
-                'data_type'     => 'spent_capped',
-                'currency_name' => $currencyName,
-                'type'          => 'bar',
-                'yAxisID'       => 0, // 0, 1, 2
-                'entries'       => $entries,
-            ];
-
-            // overspent
-            $return['overspent'] = [
-                'label'         => sprintf('%s (%s)', trans('firefly.overspent'), $currencyName),
-                'data_type'     => 'overspent',
-                'currency_name' => $currencyName,
-                'type'          => 'bar',
-                'yAxisID'       => 0, // 0, 1, 2
-                'entries'       => $entries,
-            ];
-
-        }
-
-        return $return;
-    }
-
-    /**
-     * @param array $basic
-     * @param array $sets
-     *
-     * @return array
-     */
-    private function fillSets(array $basic, array $sets): array
-    {
-        foreach ($sets as $set) {
-            $label                                    = $set['label'];
-            //$basic['spent']['entries'][$label]        = $set['entries']['spent'];
-            $basic['spent_capped']['entries'][$label] = $set['entries']['spent_capped'];
-            $basic['left']['entries'][$label]         = $set['entries']['left'];
-            $basic['overspent']['entries'][$label]    = $set['entries']['overspent'];
-        }
-
-        return $basic;
-    }
-
-    /**
-     * @param array $expenses
-     *
-     * @return array
-     */
-    private function filterNulls(array $expenses): array
-    {
-        $return = [];
-        /** @var array|null $arr */
-        foreach ($expenses as $arr) {
-            if ([] !== $arr) {
-                $return[] = $arr;
-            }
-        }
-
-        return $return;
-    }
-
-    /**
-     * @param Budget $budget
-     * @param Carbon $start
-     * @param Carbon $end
-     *
-     * @return array
-     */
-    private function getExpenseInRange(Budget $budget, Carbon $start, Carbon $end): array
-    {
-        $spent  = $this->opsRepository->sumExpenses($start, $end, null, new Collection([$budget]), null);
-        $return = [];
-        /** @var array $set */
-        foreach ($spent as $set) {
-            $current                            = [
-                'label'                   => sprintf('%s (%s)', $budget->name, $set['currency_name']),
-                'budget_name'             => $budget->name,
-                'start_date'              => $start->format('Y-m-d'),
-                'end_date'                => $end->format('Y-m-d'),
-                'currency_id'             => (int) $set['currency_id'],
-                'currency_code'           => $set['currency_code'],
-                'currency_name'           => $set['currency_name'],
-                'currency_symbol'         => $set['currency_symbol'],
-                'currency_decimal_places' => (int) $set['currency_decimal_places'],
-                'type'                    => 'bar', // line, area or bar,
-                'entries'                 => [],
-            ];
-            $sumSpent                           = bcmul($set['sum'], '-1'); // spent
-            $current['entries']['spent']        = $sumSpent;
-            $current['entries']['amount']       = '0';
-            $current['entries']['spent_capped'] = $sumSpent;
-            $current['entries']['left']         = '0';
-            $current['entries']['overspent']    = '0';
-            $return[]                           = $current;
-        }
-
-        return $return;
-    }
-
-    /**
-     * @param BudgetLimit $limit
-     *
-     * @return array
-     */
-    private function getExpensesForLimit(BudgetLimit $limit): array
-    {
-        $budget   = $limit->budget;
-        $spent    = $this->opsRepository->sumExpenses($limit->start_date, $limit->end_date, null, new Collection([$budget]), $limit->transactionCurrency);
-        $currency = $limit->transactionCurrency;
-        // when limited to a currency, the count is always one. Or it's empty.
-        $set = array_shift($spent);
-        if (null === $set) {
-            return [];
-        }
-        $return                            = [
-            'label'                   => sprintf('%s (%s)', $budget->name, $set['currency_name']),
-            'budget_name'             => $budget->name,
-            'start_date'              => $limit->start_date->format('Y-m-d'),
-            'end_date'                => $limit->end_date->format('Y-m-d'),
-            'currency_id'             => (int) $currency->id,
-            'currency_code'           => $currency->code,
-            'currency_name'           => $currency->name,
-            'currency_symbol'         => $currency->symbol,
-            'currency_decimal_places' => (int) $currency->decimal_places,
-            'type'                    => 'bar', // line, area or bar,
-            'entries'                 => [],
-        ];
-        $sumSpent                          = bcmul($set['sum'], '-1'); // spent
-        $return['entries']['spent']        = $sumSpent;
-        $return['entries']['amount']       = $limit->amount;
-        $return['entries']['spent_capped'] = 1 === bccomp($sumSpent, $limit->amount) ? $limit->amount : $sumSpent;
-        $return['entries']['left']         = 1 === bccomp($limit->amount, $sumSpent) ? bcadd($set['sum'], $limit->amount) : '0'; // left
-        $return['entries']['overspent']    = 1 === bccomp($limit->amount, $sumSpent) ? '0' : bcmul(bcadd($set['sum'], $limit->amount), '-1'); // overspent
-
-        return $return;
-    }
-
-}

app/Api/V1/Controllers/Chart/CategoryController.php

@@ -1,139 +0,0 @@
-<?php
-
-/**
- * CategoryController.php
- * Copyright (c) 2019 james@firefly-iii.org
- *
- * This file is part of Firefly III (https://github.com/firefly-iii).
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as
- * published by the Free Software Foundation, either version 3 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
-
-declare(strict_types=1);
-
-namespace FireflyIII\Api\V1\Controllers\Chart;
-
-use Carbon\Carbon;
-use FireflyIII\Api\V1\Controllers\Controller;
-use FireflyIII\Api\V1\Requests\DateRequest;
-use FireflyIII\Repositories\Category\CategoryRepositoryInterface;
-use FireflyIII\Repositories\Category\NoCategoryRepositoryInterface;
-use FireflyIII\Repositories\Category\OperationsRepositoryInterface;
-use FireflyIII\User;
-use Illuminate\Http\JsonResponse;
-
-/**
- * Class CategoryController
- */
-class CategoryController extends Controller
-{
-    /** @var CategoryRepositoryInterface */
-    private $categoryRepository;
-
-    /** @var NoCategoryRepositoryInterface */
-    private $noCatRepository;
-
-    /** @var OperationsRepositoryInterface */
-    private $opsRepository;
-
-
-    /**
-     * AccountController constructor.
-     *
-     * @codeCoverageIgnore
-     */
-    public function __construct()
-    {
-        parent::__construct();
-        $this->middleware(
-            function ($request, $next) {
-                /** @var User $user */
-                $user                     = auth()->user();
-                $this->categoryRepository = app(CategoryRepositoryInterface::class);
-                $this->opsRepository      = app(OperationsRepositoryInterface::class);
-                $this->noCatRepository    = app(NoCategoryRepositoryInterface::class);
-                $this->categoryRepository->setUser($user);
-                $this->opsRepository->setUser($user);
-                $this->noCatRepository->setUser($user);
-
-                return $next($request);
-            }
-        );
-    }
-
-
-    /**
-     * @param DateRequest $request
-     *
-     * @return JsonResponse
-     */
-    public function overview(DateRequest $request): JsonResponse
-    {
-        // parameters for chart:
-        $dates = $request->getAll();
-        /** @var Carbon $start */
-        $start = $dates['start'];
-        /** @var Carbon $end */
-        $end = $dates['end'];
-
-
-        $tempData      = [];
-        $spentWith     = $this->opsRepository->listExpenses($start, $end);
-        $spentWithout  = $this->noCatRepository->listExpenses($start, $end);
-        $categories    = [];
-
-
-        foreach ([$spentWith, $spentWithout, ] as $set) {
-            foreach ($set as $currency) {
-                foreach ($currency['categories'] as $category) {
-                    $categories[] = $category['name'];
-                    $outKey       = sprintf('%d-e', $currency['currency_id']);
-                    $tempData[$outKey] = $tempData[$outKey] ?? [
-                            'currency_id'             => $currency['currency_id'],
-                            'label'                   => (string) trans('firefly.box_spent_in_currency', ['currency' => $currency['currency_name']]),
-                            'currency_code'           => $currency['currency_code'],
-                            'currency_symbol'         => $currency['currency_symbol'],
-                            'currency_decimal_places' => $currency['currency_decimal_places'],
-                            'type'                    => 'bar', // line, area or bar
-                            'yAxisID'                 => 0, // 0, 1, 2
-                            'entries'                 => [],
-                        ];
-
-                    foreach ($category['transaction_journals'] as $journal) {
-                        // is it expense or income?
-                        $currentKey                              = sprintf('%d-%s', $currency['currency_id'], 'e');
-                        $name                                    = $category['name'];
-                        $tempData[$currentKey]['entries'][$name] = $tempData[$currentKey]['entries'][$name] ?? '0';
-                        $tempData[$currentKey]['entries'][$name] = bcadd($tempData[$currentKey]['entries'][$name], $journal['amount']);
-                    }
-                }
-            }
-        }
-
-        // re-sort every spent array and add 0 for missing entries.
-        foreach ($tempData as $index => $set) {
-            $oldSet = $set['entries'];
-            $newSet = [];
-            foreach ($categories as $category) {
-                $value             = $oldSet[$category] ?? '0';
-                $value             = -1 === bccomp($value, '0') ? bcmul($value, '-1') : $value;
-                $newSet[$category] = $value;
-            }
-            $tempData[$index]['entries'] = $newSet;
-        }
-        $chartData = array_values($tempData);
-
-        return response()->json($chartData);
-    }
-}

app/Api/V1/Controllers/ConfigurationController.php

@@ -1,117 +0,0 @@
-<?php
-/**
- * ConfigurationController.php
- * Copyright (c) 2019 james@firefly-iii.org
- *
- * This file is part of Firefly III (https://github.com/firefly-iii).
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as
- * published by the Free Software Foundation, either version 3 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
-
-declare(strict_types=1);
-
-namespace FireflyIII\Api\V1\Controllers;
-
-use FireflyIII\Api\V1\Requests\ConfigurationRequest;
-use FireflyIII\Exceptions\FireflyException;
-use FireflyIII\Models\Configuration;
-use FireflyIII\Repositories\User\UserRepositoryInterface;
-use FireflyIII\User;
-use Illuminate\Http\JsonResponse;
-
-/**
- * Class ConfigurationController.
- *
- * @codeCoverageIgnore
- */
-class ConfigurationController extends Controller
-{
-    /** @var UserRepositoryInterface The user repository */
-    private $repository;
-
-
-    /**
-     * ConfigurationController constructor.
-     */
-    public function __construct()
-    {
-        parent::__construct();
-        $this->middleware(
-            function ($request, $next) {
-                $this->repository = app(UserRepositoryInterface::class);
-                /** @var User $admin */
-                $admin = auth()->user();
-
-                if (!$this->repository->hasRole($admin, 'owner')) {
-                    throw new FireflyException('200005: You need the "owner" role to do this.'); // @codeCoverageIgnore
-                }
-
-                return $next($request);
-            }
-        );
-    }
-
-    /**
-     * Show all configuration.
-     *
-     * @return JsonResponse
-     */
-    public function index(): JsonResponse
-    {
-        $configData = $this->getConfigData();
-
-        return response()->json(['data' => $configData])->header('Content-Type', 'application/vnd.api+json');
-    }
-
-    /**
-     * Update the configuration.
-     *
-     * @param ConfigurationRequest $request
-     * @param string               $name
-     *
-     * @return JsonResponse
-     */
-    public function update(ConfigurationRequest $request, string $name): JsonResponse
-    {
-        $data = $request->getAll();
-        app('fireflyconfig')->set($name, $data['value']);
-        $configData = $this->getConfigData();
-
-        return response()->json(['data' => $configData])->header('Content-Type', 'application/vnd.api+json');
-    }
-
-    /**
-     * Get all config values.
-     *
-     * @return array
-     */
-    private function getConfigData(): array
-    {
-        /** @var Configuration $isDemoSite */
-        $isDemoSite = app('fireflyconfig')->get('is_demo_site');
-        /** @var Configuration $updateCheck */
-        $updateCheck = app('fireflyconfig')->get('permission_update_check');
-        /** @var Configuration $lastCheck */
-        $lastCheck = app('fireflyconfig')->get('last_update_check');
-        /** @var Configuration $singleUser */
-        $singleUser = app('fireflyconfig')->get('single_user_mode');
-
-        return [
-            'is_demo_site'            => null === $isDemoSite ? null : $isDemoSite->data,
-            'permission_update_check' => null === $updateCheck ? null : (int) $updateCheck->data,
-            'last_update_check'       => null === $lastCheck ? null : (int) $lastCheck->data,
-            'single_user_mode'        => null === $singleUser ? null : $singleUser->data,
-        ];
-    }
-}

app/Api/V1/Controllers/Controller.php

@@ -26,6 +26,7 @@ namespace FireflyIII\Api\V1\Controllers;
 
 use Carbon\Carbon;
 use Carbon\Exceptions\InvalidDateException;
+use Carbon\Exceptions\InvalidFormatException;
 use Illuminate\Foundation\Auth\Access\AuthorizesRequests;
 use Illuminate\Foundation\Bus\DispatchesJobs;
 use Illuminate\Foundation\Validation\ValidatesRequests;
@@ -33,6 +34,8 @@ use Illuminate\Routing\Controller as BaseController;
 use League\Fractal\Manager;
 use League\Fractal\Serializer\JsonApiSerializer;
 use Log;
+use Psr\Container\ContainerExceptionInterface;
+use Psr\Container\NotFoundExceptionInterface;
 use Symfony\Component\HttpFoundation\ParameterBag;
 
 /**
@@ -44,29 +47,108 @@ abstract class Controller extends BaseController
 {
     use AuthorizesRequests, DispatchesJobs, ValidatesRequests;
 
+    protected const CONTENT_TYPE = 'application/vnd.api+json';
+    protected array        $allowedSort;
     protected ParameterBag $parameters;
 
-
     /**
      * Controller constructor.
      */
     public function __construct()
     {
         // get global parameters
-        $this->parameters = $this->getParameters();
+        $this->allowedSort = config('firefly.allowed_sort_parameters');
+        $this->parameters  = $this->getParameters();
         $this->middleware(
             function ($request, $next) {
                 if (auth()->check()) {
                     $language = app('steam')->getLanguage();
                     app()->setLocale($language);
                 }
+
                 return $next($request);
-            });
+            }
+        );
 
     }
 
     /**
-     * Method to help build URI's.
+     * Method to grab all parameters from the URL.
+     *
+     * @return ParameterBag
+     * @throws ContainerExceptionInterface
+     * @throws NotFoundExceptionInterface
+     */
+    private function getParameters(): ParameterBag
+    {
+        $bag  = new ParameterBag;
+        $page = (int)request()->get('page');
+        if (0 === $page) {
+            $page = 1;
+        }
+        $bag->set('page', $page);
+
+        // some date fields:
+        $dates = ['start', 'end', 'date'];
+        foreach ($dates as $field) {
+            $date = request()->query->get($field);
+            $obj  = null;
+            if (null !== $date) {
+                try {
+                    $obj = Carbon::parse($date);
+                } catch (InvalidDateException | InvalidFormatException $e) {
+                    // don't care
+                    Log::warning(sprintf('Ignored invalid date "%s" in API controller parameter check: %s', $date, $e->getMessage()));
+                }
+            }
+            $bag->set($field, $obj);
+        }
+
+        // integer fields:
+        $integers = ['limit'];
+        foreach ($integers as $integer) {
+            $value = request()->query->get($integer);
+            if (null !== $value) {
+                $bag->set($integer, (int)$value);
+            }
+        }
+
+        // sort fields:
+        return $this->getSortParameters($bag);
+    }
+
+    /**
+     * @param ParameterBag $bag
+     *
+     * @return ParameterBag
+     */
+    private function getSortParameters(ParameterBag $bag): ParameterBag
+    {
+        $sortParameters = [];
+        $param          = (string)request()->query->get('sort');
+        if ('' === $param) {
+            return $bag;
+        }
+        $parts = explode(',', $param);
+        foreach ($parts as $part) {
+            $part      = trim($part);
+            $direction = 'asc';
+            if ('-' === $part[0]) {
+                $part      = substr($part, 1);
+                $direction = 'desc';
+            }
+            if (in_array($part, $this->allowedSort, true)) {
+                $sortParameters[] = [$part, $direction];
+            }
+        }
+        $bag->set('sort', $sortParameters);
+
+        return $bag;
+    }
+
+
+    /**
+     * Method to help build URL's.
      *
      * @return string
      */
@@ -84,9 +166,8 @@ abstract class Controller extends BaseController
             }
             $params[$key] = $value;
         }
-        $return .= http_build_query($params);
 
-        return $return;
+        return $return . http_build_query($params);
     }
 
     /**
@@ -101,47 +182,4 @@ abstract class Controller extends BaseController
 
         return $manager;
     }
-
-    /**
-     * Method to grab all parameters from the URI.
-     *
-     * @return ParameterBag
-     */
-    private function getParameters(): ParameterBag
-    {
-        $bag  = new ParameterBag;
-        $page = (int) request()->get('page');
-        if (0 === $page) {
-            $page = 1;
-        }
-        $bag->set('page', $page);
-
-        // some date fields:
-        $dates = ['start', 'end', 'date'];
-        foreach ($dates as $field) {
-            $date = request()->query->get($field);
-            $obj  = null;
-            if (null !== $date) {
-                try {
-                    $obj = Carbon::parse($date);
-                } catch (InvalidDateException $e) {
-                    // don't care
-                    Log::error(sprintf('Invalid date exception in API controller: %s', $e->getMessage()));
-                }
-            }
-            $bag->set($field, $obj);
-        }
-
-        // integer fields:
-        $integers = ['limit'];
-        foreach ($integers as $integer) {
-            $value = request()->query->get($integer);
-            if (null !== $value) {
-                $bag->set($integer, (int) $value);
-            }
-        }
-
-        return $bag;
-
-    }
 }

app/Api/V1/Controllers/CurrencyExchangeRateController.php

@@ -1,112 +0,0 @@
-<?php
-/**
- * CurrencyExchangeRateController.php
- * Copyright (c) 2019 james@firefly-iii.org
- *
- * This file is part of Firefly III (https://github.com/firefly-iii).
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as
- * published by the Free Software Foundation, either version 3 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
-
-declare(strict_types=1);
-
-namespace FireflyIII\Api\V1\Controllers;
-
-use Carbon\Carbon;
-use FireflyIII\Exceptions\FireflyException;
-use FireflyIII\Repositories\Currency\CurrencyRepositoryInterface;
-use FireflyIII\Services\Currency\ExchangeRateInterface;
-use FireflyIII\Transformers\CurrencyExchangeRateTransformer;
-use FireflyIII\User;
-use Illuminate\Http\JsonResponse;
-use Illuminate\Http\Request;
-use League\Fractal\Resource\Item;
-
-/**
- * Class CurrencyExchangeRateController
- *
- * @codeCoverageIgnore
- */
-class CurrencyExchangeRateController extends Controller
-{
-    /** @var CurrencyRepositoryInterface The currency repository */
-    private $repository;
-
-
-    /**
-     * CurrencyExchangeRateController constructor.
-     */
-    public function __construct()
-    {
-        parent::__construct();
-        $this->middleware(
-            function ($request, $next) {
-                /** @var User $admin */
-                $admin = auth()->user();
-
-                $this->repository = app(CurrencyRepositoryInterface::class);
-                $this->repository->setUser($admin);
-
-                return $next($request);
-            }
-        );
-
-    }
-
-    /**
-     * Show an exchange rate.
-     *
-     * @param Request $request
-     *
-     * @throws FireflyException
-     * @return JsonResponse
-     */
-    public function index(Request $request): JsonResponse
-    {
-        $manager      = $this->getManager();
-        $fromCurrency = $this->repository->findByCodeNull($request->get('from') ?? 'EUR');
-        $toCurrency   = $this->repository->findByCodeNull($request->get('to') ?? 'USD');
-
-        if (null === $fromCurrency) {
-            throw new FireflyException('200007: Unknown source currency');
-        }
-        if (null === $toCurrency) {
-            throw new FireflyException('200007: Unknown destination currency');
-        }
-
-        /** @var Carbon $dateObj */
-        $dateObj = Carbon::createFromFormat('Y-m-d', $request->get('date') ?? date('Y-m-d'));
-        $this->parameters->set('from', $fromCurrency->code);
-        $this->parameters->set('to', $toCurrency->code);
-        $this->parameters->set('date', $dateObj->format('Y-m-d'));
-        $this->parameters->set('amount', $request->get('amount'));
-
-        $rate = $this->repository->getExchangeRate($fromCurrency, $toCurrency, $dateObj);
-        if (null === $rate) {
-            /** @var User $admin */
-            $admin = auth()->user();
-            // create service:
-            /** @var ExchangeRateInterface $service */
-            $service = app(ExchangeRateInterface::class);
-            $service->setUser($admin);
-            $rate = $service->getRate($fromCurrency, $toCurrency, $dateObj);
-        }
-        /** @var CurrencyExchangeRateTransformer $transformer */
-        $transformer = app(CurrencyExchangeRateTransformer::class);
-        $transformer->setParameters($this->parameters);
-        $resource = new Item($rate, $transformer, 'currency_exchange_rates');
-
-        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', 'application/vnd.api+json');
-    }
-}

app/Api/V1/Controllers/Data/Bulk/AccountController.php

@@ -0,0 +1,81 @@
+<?php
+
+/*
+ * AccountController.php
+ * Copyright (c) 2021 james@firefly-iii.org
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Api\V1\Controllers\Data\Bulk;
+
+
+use FireflyIII\Api\V1\Controllers\Controller;
+use FireflyIII\Api\V1\Requests\Data\Bulk\MoveTransactionsRequest;
+use FireflyIII\Repositories\Account\AccountRepositoryInterface;
+use FireflyIII\Services\Internal\Destroy\AccountDestroyService;
+use Illuminate\Http\JsonResponse;
+
+/**
+ * Class AccountController
+ *
+ * @deprecated
+ */
+class AccountController extends Controller
+{
+    private AccountRepositoryInterface $repository;
+
+    /**
+     *
+     */
+    public function __construct()
+    {
+        parent::__construct();
+        $this->middleware(
+            function ($request, $next) {
+                $this->repository = app(AccountRepositoryInterface::class);
+                $this->repository->setUser(auth()->user());
+
+                return $next($request);
+            }
+        );
+    }
+
+    /**
+     * This endpoint is deprecated and not documented.
+     *
+     * @param MoveTransactionsRequest $request
+     *
+     * @return JsonResponse
+     * @deprecated
+     */
+    public function moveTransactions(MoveTransactionsRequest $request): JsonResponse
+    {
+        $accountIds  = $request->getAll();
+        $original    = $this->repository->find($accountIds['original_account']);
+        $destination = $this->repository->find($accountIds['destination_account']);
+
+        /** @var AccountDestroyService $service */
+        $service = app(AccountDestroyService::class);
+        $service->moveTransactions($original, $destination);
+
+        return response()->json([], 204);
+
+    }
+
+}

app/Api/V1/Controllers/Data/Bulk/TransactionController.php

@@ -0,0 +1,100 @@
+<?php
+
+/*
+ * TransactionController.php
+ * Copyright (c) 2021 james@firefly-iii.org
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Api\V1\Controllers\Data\Bulk;
+
+use FireflyIII\Api\V1\Controllers\Controller;
+use FireflyIII\Api\V1\Requests\Data\Bulk\TransactionRequest;
+use FireflyIII\Repositories\Account\AccountRepositoryInterface;
+use FireflyIII\Services\Internal\Destroy\AccountDestroyService;
+use Illuminate\Http\JsonResponse;
+
+/**
+ * Class TransactionController
+ *
+ * Endpoint to update transactions by submitting
+ * (optional) a "where" clause and an "update"
+ * clause.
+ *
+ * Because this is a security nightmare waiting to happen validation
+ * is pretty strict.
+ */
+class TransactionController extends Controller
+{
+    private AccountRepositoryInterface $repository;
+
+    /**
+     *
+     */
+    public function __construct()
+    {
+        parent::__construct();
+        $this->middleware(
+            function ($request, $next) {
+                $this->repository = app(AccountRepositoryInterface::class);
+                $this->repository->setUser(auth()->user());
+
+                return $next($request);
+            }
+        );
+    }
+
+    /**
+     * This endpoint is documented at:
+     *
+     * @param TransactionRequest $request
+     *
+     * @return JsonResponse
+     */
+    public function update(TransactionRequest $request): JsonResponse
+    {
+        $query  = $request->getAll();
+        $params = $query['query'];
+
+        // this deserves better code, but for now a loop of basic if-statements
+        // to respond to what is in the $query.
+        // this is OK because only one thing can be in the query at the moment.
+        if ($this->updatesTransactionAccount($params)) {
+            $original    = $this->repository->find((int) $params['where']['account_id']);
+            $destination = $this->repository->find((int) $params['update']['account_id']);
+
+            /** @var AccountDestroyService $service */
+            $service = app(AccountDestroyService::class);
+            $service->moveTransactions($original, $destination);
+        }
+
+        return response()->json([], 204);
+    }
+
+    /**
+     * @param array $params
+     *
+     * @return bool
+     */
+    private function updatesTransactionAccount(array $params): bool
+    {
+        return array_key_exists('account_id', $params['where']) && array_key_exists('account_id', $params['update']);
+    }
+
+}

app/Api/V1/Controllers/Data/DestroyController.php

@@ -1,7 +1,7 @@
 <?php
-/**
+/*
  * DestroyController.php
- * Copyright (c) 2020 james@firefly-iii.org
+ * Copyright (c) 2021 james@firefly-iii.org
  *
  * This file is part of Firefly III (https://github.com/firefly-iii).
  *
@@ -24,7 +24,7 @@ declare(strict_types=1);
 namespace FireflyIII\Api\V1\Controllers\Data;
 
 use FireflyIII\Api\V1\Controllers\Controller;
-use FireflyIII\Api\V1\Requests\DataDestroyRequest;
+use FireflyIII\Api\V1\Requests\Data\DestroyRequest;
 use FireflyIII\Exceptions\FireflyException;
 use FireflyIII\Models\Account;
 use FireflyIII\Models\AccountType;
@@ -52,9 +52,15 @@ use Illuminate\Http\JsonResponse;
 class DestroyController extends Controller
 {
     /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/data/destroyData
+     *
+     * @param DestroyRequest $request
+     *
      * @return JsonResponse
+     * @throws FireflyException
      */
-    public function destroy(DataDestroyRequest $request): JsonResponse
+    public function destroy(DestroyRequest $request): JsonResponse
     {
         $objects = $request->getObjects();
 
@@ -160,31 +166,6 @@ class DestroyController extends Controller
         return response()->json([], 204);
     }
 
-    /**
-     * @param array $types
-     */
-    private function destroyAccounts(array $types): void
-    {
-        /** @var AccountRepositoryInterface $repository */
-        $repository = app(AccountRepositoryInterface::class);
-        $collection = $repository->getAccountsByType($types);
-        $service    = app(AccountDestroyService::class);
-        /** @var Account $account */
-        foreach ($collection as $account) {
-            $service->destroy($account, null);
-        }
-    }
-
-    /**
-     *
-     */
-    private function destroyBills(): void
-    {
-        /** @var BillRepositoryInterface $repository */
-        $repository = app(BillRepositoryInterface::class);
-        $repository->destroyAll();
-    }
-
     /**
      *
      */
@@ -206,18 +187,11 @@ class DestroyController extends Controller
     /**
      *
      */
-    private function destroyCategories(): void
+    private function destroyBills(): void
     {
-        /** @var CategoryRepositoryInterface $categoryRepos */
-        $categoryRepos = app(CategoryRepositoryInterface::class);
-        $categoryRepos->destroyAll();
-    }
-
-    private function destroyObjectGroups(): void
-    {
-        /** @var ObjectGroupRepositoryInterface $repository */
-        $repository = app(ObjectGroupRepositoryInterface::class);
-        $repository->deleteAll();
+        /** @var BillRepositoryInterface $repository */
+        $repository = app(BillRepositoryInterface::class);
+        $repository->destroyAll();
     }
 
     /**
@@ -230,16 +204,6 @@ class DestroyController extends Controller
         $repository->destroyAll();
     }
 
-    /**
-     *
-     */
-    private function destroyRecurringTransactions(): void
-    {
-        /** @var RecurringRepositoryInterface $repository */
-        $repository = app(RecurringRepositoryInterface::class);
-        $repository->destroyAll();
-    }
-
     /**
      *
      */
@@ -250,6 +214,26 @@ class DestroyController extends Controller
         $repository->destroyAll();
     }
 
+    /**
+     *
+     */
+    private function destroyRecurringTransactions(): void
+    {
+        /** @var RecurringRepositoryInterface $repository */
+        $repository = app(RecurringRepositoryInterface::class);
+        $repository->destroyAll();
+    }
+
+    /**
+     *
+     */
+    private function destroyCategories(): void
+    {
+        /** @var CategoryRepositoryInterface $categoryRepos */
+        $categoryRepos = app(CategoryRepositoryInterface::class);
+        $categoryRepos->destroyAll();
+    }
+
     /**
      *
      */
@@ -260,6 +244,28 @@ class DestroyController extends Controller
         $tagRepository->destroyAll();
     }
 
+    private function destroyObjectGroups(): void
+    {
+        /** @var ObjectGroupRepositoryInterface $repository */
+        $repository = app(ObjectGroupRepositoryInterface::class);
+        $repository->deleteAll();
+    }
+
+    /**
+     * @param array $types
+     */
+    private function destroyAccounts(array $types): void
+    {
+        /** @var AccountRepositoryInterface $repository */
+        $repository = app(AccountRepositoryInterface::class);
+        $collection = $repository->getAccountsByType($types);
+        $service    = app(AccountDestroyService::class);
+        /** @var Account $account */
+        foreach ($collection as $account) {
+            $service->destroy($account, null);
+        }
+    }
+
     /**
      * @param array $types
      */
@@ -267,10 +273,10 @@ class DestroyController extends Controller
     {
         /** @var JournalRepositoryInterface $repository */
         $repository = app(JournalRepositoryInterface::class);
-        $journals = $repository->findByType($types);
-        $service = app(JournalDestroyService::class);
+        $journals   = $repository->findByType($types);
+        $service    = app(JournalDestroyService::class);
         /** @var TransactionJournal $journal */
-        foreach($journals as $journal) {
+        foreach ($journals as $journal) {
             $service->destroy($journal);
         }
     }

app/Api/V1/Controllers/Data/Export/ExportController.php

@@ -0,0 +1,233 @@
+<?php
+
+/*
+ * ExportController.php
+ * Copyright (c) 2021 james@firefly-iii.org
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Api\V1\Controllers\Data\Export;
+
+use FireflyIII\Api\V1\Controllers\Controller;
+use FireflyIII\Api\V1\Requests\Data\Export\ExportRequest;
+use FireflyIII\Exceptions\FireflyException;
+use FireflyIII\Support\Export\ExportDataGenerator;
+use Illuminate\Http\Response as LaravelResponse;
+
+/**
+ * Class ExportController
+ */
+class ExportController extends Controller
+{
+    private ExportDataGenerator $exporter;
+
+    /**
+     * ExportController constructor.
+     */
+    public function __construct()
+    {
+        parent::__construct();
+        $this->middleware(
+            function ($request, $next) {
+                $this->exporter = app(ExportDataGenerator::class);
+                $this->exporter->setUser(auth()->user());
+
+                return $next($request);
+            }
+        );
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/data/exportAccounts
+     *
+     * @param ExportRequest $request
+     *
+     * @return LaravelResponse
+     * @throws FireflyException
+     */
+    public function accounts(ExportRequest $request): LaravelResponse
+    {
+        $this->exporter->setExportAccounts(true);
+
+        return $this->returnExport('accounts');
+
+    }
+
+    /**
+     * @param string $key
+     *
+     * @return LaravelResponse
+     * @throws FireflyException
+     */
+    private function returnExport(string $key): LaravelResponse
+    {
+        $date     = date('Y-m-d-H-i-s');
+        $fileName = sprintf('%s-export-%s.csv', $date, $key);
+        $data     = $this->exporter->export();
+
+        /** @var LaravelResponse $response */
+        $response = response($data[$key]);
+        $response
+            ->header('Content-Description', 'File Transfer')
+            ->header('Content-Type', 'application/octet-stream')
+            ->header('Content-Disposition', 'attachment; filename=' . $fileName)
+            ->header('Content-Transfer-Encoding', 'binary')
+            ->header('Connection', 'Keep-Alive')
+            ->header('Expires', '0')
+            ->header('Cache-Control', 'must-revalidate, post-check=0, pre-check=0')
+            ->header('Pragma', 'public')
+            ->header('Content-Length', (string) strlen($data[$key]));
+
+        return $response;
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/data/exportBills
+     *
+     * @param ExportRequest $request
+     *
+     * @return LaravelResponse
+     * @throws FireflyException
+     */
+    public function bills(ExportRequest $request): LaravelResponse
+    {
+        $this->exporter->setExportBills(true);
+
+        return $this->returnExport('bills');
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/data/exportBudgets
+     *
+     * @param ExportRequest $request
+     *
+     * @return LaravelResponse
+     * @throws FireflyException
+     */
+    public function budgets(ExportRequest $request): LaravelResponse
+    {
+        $this->exporter->setExportBudgets(true);
+
+        return $this->returnExport('budgets');
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/data/exportCategories
+     *
+     * @param ExportRequest $request
+     *
+     * @return LaravelResponse
+     * @throws FireflyException
+     */
+    public function categories(ExportRequest $request): LaravelResponse
+    {
+        $this->exporter->setExportCategories(true);
+
+        return $this->returnExport('categories');
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/data/exportPiggies
+     *
+     * @param ExportRequest $request
+     *
+     * @return LaravelResponse
+     * @throws FireflyException
+     */
+    public function piggyBanks(ExportRequest $request): LaravelResponse
+    {
+        $this->exporter->setExportPiggies(true);
+
+        return $this->returnExport('piggies');
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/data/exportRecurring
+     *
+     * @param ExportRequest $request
+     *
+     * @return LaravelResponse
+     * @throws FireflyException
+     */
+    public function recurring(ExportRequest $request): LaravelResponse
+    {
+        $this->exporter->setExportRecurring(true);
+
+        return $this->returnExport('recurrences');
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/data/exportRules
+     *
+     * @param ExportRequest $request
+     *
+     * @return LaravelResponse
+     * @throws FireflyException
+     */
+    public function rules(ExportRequest $request): LaravelResponse
+    {
+        $this->exporter->setExportRules(true);
+
+        return $this->returnExport('rules');
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/data/exportTags
+     *
+     * @param ExportRequest $request
+     *
+     * @return LaravelResponse
+     * @throws FireflyException
+     */
+    public function tags(ExportRequest $request): LaravelResponse
+    {
+        $this->exporter->setExportTags(true);
+
+        return $this->returnExport('tags');
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/data/exportTransactions
+     *
+     * @param ExportRequest $request
+     *
+     * @return LaravelResponse
+     * @throws FireflyException
+     */
+    public function transactions(ExportRequest $request): LaravelResponse
+    {
+        $params = $request->getAll();
+        $this->exporter->setStart($params['start']);
+        $this->exporter->setEnd($params['end']);
+        $this->exporter->setAccounts($params['accounts']);
+        $this->exporter->setExportTransactions(true);
+
+        return $this->returnExport('transactions');
+    }
+
+}

app/Api/V1/Controllers/Insight/Expense/AccountController.php

@@ -0,0 +1,138 @@
+<?php
+
+/*
+ * DateController.php
+ * Copyright (c) 2021 james@firefly-iii.org
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Api\V1\Controllers\Insight\Expense;
+
+use FireflyIII\Api\V1\Controllers\Controller;
+use FireflyIII\Api\V1\Requests\Insight\GenericRequest;
+use FireflyIII\Repositories\Account\AccountRepositoryInterface;
+use FireflyIII\Repositories\Account\OperationsRepositoryInterface;
+use FireflyIII\Repositories\Currency\CurrencyRepositoryInterface;
+use FireflyIII\Support\Http\Api\ApiSupport;
+use Illuminate\Http\JsonResponse;
+
+/**
+ *
+ * Class AccountController
+ *
+ * Shows expense information grouped or limited by date.
+ * I.e. all expenses grouped by account + currency.
+ */
+class AccountController extends Controller
+{
+    use ApiSupport;
+
+    private CurrencyRepositoryInterface   $currencyRepository;
+    private OperationsRepositoryInterface $opsRepository;
+    private AccountRepositoryInterface    $repository;
+
+    /**
+     * AccountController constructor.
+     *
+     * @codeCoverageIgnore
+     */
+    public function __construct()
+    {
+        parent::__construct();
+        $this->middleware(
+            function ($request, $next) {
+                $user             = auth()->user();
+                $this->repository = app(AccountRepositoryInterface::class);
+                $this->repository->setUser($user);
+
+                $this->currencyRepository = app(CurrencyRepositoryInterface::class);
+                $this->currencyRepository->setUser($user);
+
+                $this->opsRepository = app(OperationsRepositoryInterface::class);
+                $this->opsRepository->setUser($user);
+
+                return $next($request);
+            }
+        );
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/insight/insightExpenseAsset
+     *
+     * @param GenericRequest $request
+     *
+     * @return JsonResponse
+     */
+    public function asset(GenericRequest $request): JsonResponse
+    {
+        $start         = $request->getStart();
+        $end           = $request->getEnd();
+        $assetAccounts = $request->getAssetAccounts();
+        $expenses      = $this->opsRepository->sumExpensesBySource($start, $end, $assetAccounts);
+        $result        = [];
+
+        /** @var array $expense */
+        foreach ($expenses as $expense) {
+            $result[] = [
+                'id'               => (string) $expense['id'],
+                'name'             => $expense['name'],
+                'difference'       => $expense['sum'],
+                'difference_float' => (float) $expense['sum'],
+                'currency_id'      => (string) $expense['currency_id'],
+                'currency_code'    => $expense['currency_code'],
+            ];
+        }
+
+        return response()->json($result);
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/insight/insightExpenseExpense
+     *
+     * @param GenericRequest $request
+     *
+     * @return JsonResponse
+     */
+    public function expense(GenericRequest $request): JsonResponse
+    {
+        $start           = $request->getStart();
+        $end             = $request->getEnd();
+        $assetAccounts   = $request->getAssetAccounts();
+        $expenseAccounts = $request->getExpenseAccounts();
+        $expenses        = $this->opsRepository->sumExpensesByDestination($start, $end, $assetAccounts, $expenseAccounts);
+        $result          = [];
+
+        /** @var array $expense */
+        foreach ($expenses as $expense) {
+            $result[] = [
+                'id'               => (string) $expense['id'],
+                'name'             => $expense['name'],
+                'difference'       => $expense['sum'],
+                'difference_float' => (float) $expense['sum'],
+                'currency_id'      => (string) $expense['currency_id'],
+                'currency_code'    => $expense['currency_code'],
+            ];
+        }
+
+        return response()->json($result);
+    }
+
+}

app/Api/V1/Controllers/Insight/Expense/BillController.php

@@ -0,0 +1,174 @@
+<?php
+
+/*
+ * BillController.php
+ * Copyright (c) 2021 james@firefly-iii.org
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Api\V1\Controllers\Insight\Expense;
+
+use FireflyIII\Api\V1\Controllers\Controller;
+use FireflyIII\Api\V1\Requests\Insight\GenericRequest;
+use FireflyIII\Helpers\Collector\GroupCollectorInterface;
+use FireflyIII\Models\TransactionType;
+use FireflyIII\Repositories\Bill\BillRepositoryInterface;
+use Illuminate\Http\JsonResponse;
+
+/**
+ * Class BillController
+ */
+class BillController extends Controller
+{
+    private BillRepositoryInterface $repository;
+
+    /**
+     * BillController constructor.
+     */
+    public function __construct()
+    {
+        parent::__construct();
+        $this->middleware(
+            function ($request, $next) {
+                $user             = auth()->user();
+                $this->repository = app(BillRepositoryInterface::class);
+                $this->repository->setUser($user);
+
+                return $next($request);
+            }
+        );
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/insight/insightExpenseBill
+     *
+     * Expenses per bill, possibly filtered by bill and account.
+     *
+     * @param GenericRequest $request
+     *
+     * @return JsonResponse
+     */
+    public function bill(GenericRequest $request): JsonResponse
+    {
+        $accounts = $request->getAssetAccounts();
+        $bills    = $request->getBills();
+        $start    = $request->getStart();
+        $end      = $request->getEnd();
+        $response = [];
+
+        // get all bills:
+        if (0 === $bills->count()) {
+            $bills = $this->repository->getBills();
+        }
+
+        // collect all expenses in this period (regardless of type) by the given bills and accounts.
+        $collector = app(GroupCollectorInterface::class);
+        $collector->setTypes([TransactionType::WITHDRAWAL])->setRange($start, $end)->setSourceAccounts($accounts);
+        $collector->setBills($bills);
+
+        $genericSet = $collector->getExtractedJournals();
+        foreach ($genericSet as $journal) {
+            $billId            = (int) $journal['bill_id'];
+            $currencyId        = (int) $journal['currency_id'];
+            $foreignCurrencyId = (int) $journal['foreign_currency_id'];
+            $key               = sprintf('%d-%d', $billId, $currencyId);
+            $foreignKey        = sprintf('%d-%d', $billId, $foreignCurrencyId);
+
+            if (0 !== $currencyId) {
+                $response[$key]                     = $response[$key] ?? [
+                        'id'               => (string) $billId,
+                        'name'             => $journal['bill_name'],
+                        'difference'       => '0',
+                        'difference_float' => 0,
+                        'currency_id'      => (string) $currencyId,
+                        'currency_code'    => $journal['currency_code'],
+                    ];
+                $response[$key]['difference']       = bcadd($response[$key]['difference'], $journal['amount']);
+                $response[$key]['difference_float'] = (float) $response[$key]['difference'];
+            }
+            if (0 !== $foreignCurrencyId) {
+                $response[$foreignKey]                     = $response[$foreignKey] ?? [
+                        'difference'       => '0',
+                        'difference_float' => 0,
+                        'currency_id'      => (string) $foreignCurrencyId,
+                        'currency_code'    => $journal['foreign_currency_code'],
+                    ];
+                $response[$foreignKey]['difference']       = bcadd($response[$foreignKey]['difference'], $journal['foreign_amount']);
+                $response[$foreignKey]['difference_float'] = (float) $response[$foreignKey]['difference'];
+            }
+        }
+
+        return response()->json(array_values($response));
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/insight/insightExpenseNoBill
+     *
+     * Expenses for no bill filtered by account.
+     *
+     * @param GenericRequest $request
+     *
+     * @return JsonResponse
+     */
+    public function noBill(GenericRequest $request): JsonResponse
+    {
+        $accounts = $request->getAssetAccounts();
+        $start    = $request->getStart();
+        $end      = $request->getEnd();
+        $response = [];
+
+        // collect all expenses in this period (regardless of type) by the given bills and accounts.
+        $collector = app(GroupCollectorInterface::class);
+        $collector->setTypes([TransactionType::WITHDRAWAL])->setRange($start, $end)->setSourceAccounts($accounts);
+        $collector->withoutBill();
+
+        $genericSet = $collector->getExtractedJournals();
+
+        foreach ($genericSet as $journal) {
+            $currencyId        = (int) $journal['currency_id'];
+            $foreignCurrencyId = (int) $journal['foreign_currency_id'];
+
+            if (0 !== $currencyId) {
+                $response[$currencyId]                     = $response[$currencyId] ?? [
+                        'difference'       => '0',
+                        'difference_float' => 0,
+                        'currency_id'      => (string) $currencyId,
+                        'currency_code'    => $journal['currency_code'],
+                    ];
+                $response[$currencyId]['difference']       = bcadd($response[$currencyId]['difference'], $journal['amount']);
+                $response[$currencyId]['difference_float'] = (float) $response[$currencyId]['difference'];
+            }
+            if (0 !== $foreignCurrencyId) {
+                $response[$foreignCurrencyId]                     = $response[$foreignCurrencyId] ?? [
+                        'difference'       => '0',
+                        'difference_float' => 0,
+                        'currency_id'      => (string) $foreignCurrencyId,
+                        'currency_code'    => $journal['foreign_currency_code'],
+                    ];
+                $response[$foreignCurrencyId]['difference']       = bcadd($response[$foreignCurrencyId]['difference'], $journal['foreign_amount']);
+                $response[$foreignCurrencyId]['difference_float'] = (float) $response[$foreignCurrencyId]['difference'];
+            }
+        }
+
+        return response()->json(array_values($response));
+    }
+
+}

app/Api/V1/Controllers/Insight/Expense/BudgetController.php

@@ -0,0 +1,133 @@
+<?php
+/*
+ * BudgetController.php
+ * Copyright (c) 2021 james@firefly-iii.org
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Api\V1\Controllers\Insight\Expense;
+
+use FireflyIII\Api\V1\Controllers\Controller;
+use FireflyIII\Api\V1\Requests\Insight\GenericRequest;
+use FireflyIII\Models\Budget;
+use FireflyIII\Repositories\Budget\BudgetRepositoryInterface;
+use FireflyIII\Repositories\Budget\NoBudgetRepositoryInterface;
+use FireflyIII\Repositories\Budget\OperationsRepositoryInterface;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Support\Collection;
+
+/**
+ * Class BudgetController
+ */
+class BudgetController extends Controller
+{
+    private NoBudgetRepositoryInterface   $noRepository;
+    private OperationsRepositoryInterface $opsRepository;
+    private BudgetRepositoryInterface     $repository;
+
+    /**
+     * AccountController constructor.
+     *
+     * @codeCoverageIgnore
+     */
+    public function __construct()
+    {
+        parent::__construct();
+        $this->middleware(
+            function ($request, $next) {
+                $this->opsRepository = app(OperationsRepositoryInterface::class);
+                $this->repository    = app(BudgetRepositoryInterface::class);
+                $this->noRepository  = app(NoBudgetRepositoryInterface::class);
+                $user                = auth()->user();
+                $this->opsRepository->setUser($user);
+                $this->repository->setUser($user);
+                $this->noRepository->setUser($user);
+
+                return $next($request);
+            }
+        );
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/insight/insightExpenseBudget
+     *
+     * @param GenericRequest $request
+     *
+     * @return JsonResponse
+     */
+    public function budget(GenericRequest $request): JsonResponse
+    {
+        $start         = $request->getStart();
+        $end           = $request->getEnd();
+        $budgets       = $request->getBudgets();
+        $assetAccounts = $request->getAssetAccounts();
+        $result        = [];
+        if (0 === $budgets->count()) {
+            $budgets = $this->repository->getActiveBudgets();
+        }
+        /** @var Budget $budget */
+        foreach ($budgets as $budget) {
+            $expenses = $this->opsRepository->sumExpenses($start, $end, $assetAccounts, new Collection([$budget]));
+            /** @var array $expense */
+            foreach ($expenses as $expense) {
+                $result[] = [
+                    'id'               => (string) $budget->id,
+                    'name'             => $budget->name,
+                    'difference'       => $expense['sum'],
+                    'difference_float' => (float) $expense['sum'],
+                    'currency_id'      => (string) $expense['currency_id'],
+                    'currency_code'    => $expense['currency_code'],
+                ];
+            }
+        }
+
+        return response()->json($result);
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/insight/insightExpenseNoBudget
+     *
+     * @param GenericRequest $request
+     *
+     * @return JsonResponse
+     */
+    public function noBudget(GenericRequest $request): JsonResponse
+    {
+        $start         = $request->getStart();
+        $end           = $request->getEnd();
+        $assetAccounts = $request->getAssetAccounts();
+        $result        = [];
+        $expenses      = $this->noRepository->sumExpenses($start, $end, $assetAccounts);
+        /** @var array $expense */
+        foreach ($expenses as $expense) {
+            $result[] = [
+                'difference'       => $expense['sum'],
+                'difference_float' => (float) $expense['sum'],
+                'currency_id'      => (string) $expense['currency_id'],
+                'currency_code'    => $expense['currency_code'],
+            ];
+        }
+
+        return response()->json($result);
+
+    }
+
+}

app/Api/V1/Controllers/Insight/Expense/CategoryController.php

@@ -0,0 +1,133 @@
+<?php
+
+/*
+ * CategoryController.php
+ * Copyright (c) 2021 james@firefly-iii.org
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Api\V1\Controllers\Insight\Expense;
+
+use FireflyIII\Api\V1\Controllers\Controller;
+use FireflyIII\Api\V1\Requests\Insight\GenericRequest;
+use FireflyIII\Models\Category;
+use FireflyIII\Repositories\Category\CategoryRepositoryInterface;
+use FireflyIII\Repositories\Category\NoCategoryRepositoryInterface;
+use FireflyIII\Repositories\Category\OperationsRepositoryInterface;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Support\Collection;
+
+/**
+ * Class CategoryController
+ */
+class CategoryController extends Controller
+{
+    private NoCategoryRepositoryInterface $noRepository;
+    private OperationsRepositoryInterface $opsRepository;
+    private CategoryRepositoryInterface   $repository;
+
+    /**
+     * AccountController constructor.
+     *
+     * @codeCoverageIgnore
+     */
+    public function __construct()
+    {
+        parent::__construct();
+        $this->middleware(
+            function ($request, $next) {
+                $this->opsRepository = app(OperationsRepositoryInterface::class);
+                $this->repository    = app(CategoryRepositoryInterface::class);
+                $this->noRepository  = app(NoCategoryRepositoryInterface::class);
+                $user                = auth()->user();
+                $this->opsRepository->setUser($user);
+                $this->repository->setUser($user);
+                $this->noRepository->setUser($user);
+
+                return $next($request);
+            }
+        );
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/insight/insightTransferCategory
+     *
+     * @param GenericRequest $request
+     *
+     * @return JsonResponse
+     */
+    public function category(GenericRequest $request): JsonResponse
+    {
+        $start         = $request->getStart();
+        $end           = $request->getEnd();
+        $categories    = $request->getCategories();
+        $assetAccounts = $request->getAssetAccounts();
+        $result        = [];
+        if (0 === $categories->count()) {
+            $categories = $this->repository->getCategories();
+        }
+        /** @var Category $category */
+        foreach ($categories as $category) {
+            $expenses = $this->opsRepository->sumExpenses($start, $end, $assetAccounts, new Collection([$category]));
+            /** @var array $expense */
+            foreach ($expenses as $expense) {
+                $result[] = [
+                    'id'               => (string) $category->id,
+                    'name'             => $category->name,
+                    'difference'       => $expense['sum'],
+                    'difference_float' => (float) $expense['sum'],
+                    'currency_id'      => (string) $expense['currency_id'],
+                    'currency_code'    => $expense['currency_code'],
+                ];
+            }
+        }
+
+        return response()->json($result);
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/insight/insightTransferNoCategory
+     *
+     * @param GenericRequest $request
+     *
+     * @return JsonResponse
+     */
+    public function noCategory(GenericRequest $request): JsonResponse
+    {
+        $start         = $request->getStart();
+        $end           = $request->getEnd();
+        $assetAccounts = $request->getAssetAccounts();
+        $result        = [];
+        $expenses      = $this->noRepository->sumExpenses($start, $end, $assetAccounts);
+        /** @var array $expense */
+        foreach ($expenses as $expense) {
+            $result[] = [
+                'difference'       => $expense['sum'],
+                'difference_float' => (float) $expense['sum'],
+                'currency_id'      => (string) $expense['currency_id'],
+                'currency_code'    => $expense['currency_code'],
+            ];
+        }
+
+        return response()->json($result);
+
+    }
+}

app/Api/V1/Controllers/Insight/Expense/PeriodController.php

@@ -0,0 +1,86 @@
+<?php
+/*
+ * PeriodController.php
+ * Copyright (c) 2021 james@firefly-iii.org
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Api\V1\Controllers\Insight\Expense;
+
+use FireflyIII\Api\V1\Controllers\Controller;
+use FireflyIII\Api\V1\Requests\Insight\GenericRequest;
+use FireflyIII\Helpers\Collector\GroupCollectorInterface;
+use FireflyIII\Models\TransactionType;
+use Illuminate\Http\JsonResponse;
+
+/**
+ * Class PeriodController
+ */
+class PeriodController extends Controller
+{
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/insight/insightExpenseTotal
+     *
+     * @param GenericRequest $request
+     *
+     * @return JsonResponse
+     */
+    public function total(GenericRequest $request): JsonResponse
+    {
+        $accounts = $request->getAssetAccounts();
+        $start    = $request->getStart();
+        $end      = $request->getEnd();
+        $response = [];
+
+        // collect all expenses in this period (regardless of type)
+        $collector = app(GroupCollectorInterface::class);
+        $collector->setTypes([TransactionType::WITHDRAWAL])->setRange($start, $end)->setSourceAccounts($accounts);
+        $genericSet = $collector->getExtractedJournals();
+        foreach ($genericSet as $journal) {
+            $currencyId        = (int) $journal['currency_id'];
+            $foreignCurrencyId = (int) $journal['foreign_currency_id'];
+
+            if (0 !== $currencyId) {
+                $response[$currencyId]                     = $response[$currencyId] ?? [
+                        'difference'       => '0',
+                        'difference_float' => 0,
+                        'currency_id'      => (string) $currencyId,
+                        'currency_code'    => $journal['currency_code'],
+                    ];
+                $response[$currencyId]['difference']       = bcadd($response[$currencyId]['difference'], $journal['amount']);
+                $response[$currencyId]['difference_float'] = (float) $response[$currencyId]['difference'];
+            }
+            if (0 !== $foreignCurrencyId) {
+                $response[$foreignCurrencyId]                     = $response[$foreignCurrencyId] ?? [
+                        'difference'       => '0',
+                        'difference_float' => 0,
+                        'currency_id'      => (string) $foreignCurrencyId,
+                        'currency_code'    => $journal['foreign_currency_code'],
+                    ];
+                $response[$foreignCurrencyId]['difference']       = bcadd($response[$foreignCurrencyId]['difference'], $journal['foreign_amount']);
+                $response[$foreignCurrencyId]['difference_float'] = (float) $response[$foreignCurrencyId]['difference'];
+            }
+        }
+
+        return response()->json(array_values($response));
+    }
+
+}

app/Api/V1/Controllers/Insight/Expense/TagController.php

@@ -0,0 +1,180 @@
+<?php
+
+/*
+ * TagController.php
+ * Copyright (c) 2021 james@firefly-iii.org
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Api\V1\Controllers\Insight\Expense;
+
+use FireflyIII\Api\V1\Controllers\Controller;
+use FireflyIII\Api\V1\Requests\Insight\GenericRequest;
+use FireflyIII\Helpers\Collector\GroupCollectorInterface;
+use FireflyIII\Models\TransactionType;
+use FireflyIII\Repositories\Tag\TagRepositoryInterface;
+use Illuminate\Http\JsonResponse;
+
+/**
+ * Class TagController
+ */
+class TagController extends Controller
+{
+    private TagRepositoryInterface $repository;
+
+    /**
+     * TagController constructor.
+     */
+    public function __construct()
+    {
+        parent::__construct();
+        $this->middleware(
+            function ($request, $next) {
+                $this->repository = app(TagRepositoryInterface::class);
+                $this->repository->setUser(auth()->user());
+
+                return $next($request);
+            }
+        );
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/insight/insightExpenseNoTag
+     *
+     * Expenses for no tag filtered by account.
+     *
+     * @param GenericRequest $request
+     *
+     * @return JsonResponse
+     */
+    public function noTag(GenericRequest $request): JsonResponse
+    {
+        $accounts = $request->getAssetAccounts();
+        $start    = $request->getStart();
+        $end      = $request->getEnd();
+        $response = [];
+
+        // collect all expenses in this period (regardless of type) by the given bills and accounts.
+        $collector = app(GroupCollectorInterface::class);
+        $collector->setTypes([TransactionType::WITHDRAWAL])->setRange($start, $end)->setSourceAccounts($accounts);
+        $collector->withoutTags();
+
+        $genericSet = $collector->getExtractedJournals();
+
+        foreach ($genericSet as $journal) {
+            $currencyId        = (int) $journal['currency_id'];
+            $foreignCurrencyId = (int) $journal['foreign_currency_id'];
+
+            if (0 !== $currencyId) {
+                $response[$currencyId]                     = $response[$currencyId] ?? [
+                        'difference'       => '0',
+                        'difference_float' => 0,
+                        'currency_id'      => (string) $currencyId,
+                        'currency_code'    => $journal['currency_code'],
+                    ];
+                $response[$currencyId]['difference']       = bcadd($response[$currencyId]['difference'], $journal['amount']);
+                $response[$currencyId]['difference_float'] = (float) $response[$currencyId]['difference'];
+            }
+            if (0 !== $foreignCurrencyId) {
+                $response[$foreignCurrencyId]                     = $response[$foreignCurrencyId] ?? [
+                        'difference'       => '0',
+                        'difference_float' => 0,
+                        'currency_id'      => (string) $foreignCurrencyId,
+                        'currency_code'    => $journal['foreign_currency_code'],
+                    ];
+                $response[$foreignCurrencyId]['difference']       = bcadd($response[$foreignCurrencyId]['difference'], $journal['foreign_amount']);
+                $response[$foreignCurrencyId]['difference_float'] = (float) $response[$foreignCurrencyId]['difference'];
+            }
+        }
+
+        return response()->json(array_values($response));
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/insight/insightExpenseTag
+     *
+     * Expenses per tag, possibly filtered by tag and account.
+     *
+     * @param GenericRequest $request
+     *
+     * @return JsonResponse
+     */
+    public function tag(GenericRequest $request): JsonResponse
+    {
+        $accounts = $request->getAssetAccounts();
+        $tags     = $request->getTags();
+        $start    = $request->getStart();
+        $end      = $request->getEnd();
+        $response = [];
+
+        // get all tags:
+        if (0 === $tags->count()) {
+            $tags = $this->repository->get();
+        }
+
+        // collect all expenses in this period (regardless of type) by the given bills and accounts.
+        $collector = app(GroupCollectorInterface::class);
+        $collector->setTypes([TransactionType::WITHDRAWAL])->setRange($start, $end)->setSourceAccounts($accounts);
+        $collector->setTags($tags);
+        $genericSet = $collector->getExtractedJournals();
+        /** @var array $journal */
+        foreach ($genericSet as $journal) {
+            $currencyId        = (int) $journal['currency_id'];
+            $foreignCurrencyId = (int) $journal['foreign_currency_id'];
+
+            /** @var array $tag */
+            foreach ($journal['tags'] as $tag) {
+                $tagId      = $tag['id'];
+                $key        = sprintf('%d-%d', $tagId, $currencyId);
+                $foreignKey = sprintf('%d-%d', $tagId, $foreignCurrencyId);
+
+                // on currency ID
+                if (0 !== $currencyId) {
+                    $response[$key]                     = $response[$key] ?? [
+                            'id'               => (string) $tagId,
+                            'name'             => $tag['name'],
+                            'difference'       => '0',
+                            'difference_float' => 0,
+                            'currency_id'      => (string) $currencyId,
+                            'currency_code'    => $journal['currency_code'],
+                        ];
+                    $response[$key]['difference']       = bcadd($response[$key]['difference'], $journal['amount']);
+                    $response[$key]['difference_float'] = (float) $response[$key]['difference'];
+                }
+
+                // on foreign ID
+                if (0 !== $foreignCurrencyId) {
+                    $response[$foreignKey]                     = $journal[$foreignKey] ?? [
+                            'difference'       => '0',
+                            'difference_float' => 0,
+                            'currency_id'      => (string) $foreignCurrencyId,
+                            'currency_code'    => $journal['foreign_currency_code'],
+                        ];
+                    $response[$foreignKey]['difference']       = bcadd($response[$foreignKey]['difference'], $journal['foreign_amount']);
+                    $response[$foreignKey]['difference_float'] = (float) $response[$foreignKey]['difference'];
+                }
+            }
+        }
+
+        return response()->json(array_values($response));
+    }
+
+}

app/Api/V1/Controllers/Insight/Income/AccountController.php

@@ -0,0 +1,137 @@
+<?php
+
+/*
+ * DateController.php
+ * Copyright (c) 2021 james@firefly-iii.org
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Api\V1\Controllers\Insight\Income;
+
+use FireflyIII\Api\V1\Controllers\Controller;
+use FireflyIII\Api\V1\Requests\Insight\GenericRequest;
+use FireflyIII\Repositories\Account\AccountRepositoryInterface;
+use FireflyIII\Repositories\Account\OperationsRepositoryInterface;
+use FireflyIII\Repositories\Currency\CurrencyRepositoryInterface;
+use FireflyIII\Support\Http\Api\ApiSupport;
+use Illuminate\Http\JsonResponse;
+
+/**
+ *
+ * Class AccountController
+ *
+ * Shows income information grouped or limited by date.
+ * Ie. all income grouped by account + currency.
+ */
+class AccountController extends Controller
+{
+    use ApiSupport;
+
+    private CurrencyRepositoryInterface   $currencyRepository;
+    private OperationsRepositoryInterface $opsRepository;
+    private AccountRepositoryInterface    $repository;
+
+    /**
+     * AccountController constructor.
+     *
+     * @codeCoverageIgnore
+     */
+    public function __construct()
+    {
+        parent::__construct();
+        $this->middleware(
+            function ($request, $next) {
+                $user             = auth()->user();
+                $this->repository = app(AccountRepositoryInterface::class);
+                $this->repository->setUser($user);
+
+                $this->currencyRepository = app(CurrencyRepositoryInterface::class);
+                $this->currencyRepository->setUser($user);
+
+                $this->opsRepository = app(OperationsRepositoryInterface::class);
+                $this->opsRepository->setUser($user);
+
+                return $next($request);
+            }
+        );
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/insight/insightIncomeAsset
+     *
+     * @param GenericRequest $request
+     *
+     * @return JsonResponse
+     */
+    public function asset(GenericRequest $request): JsonResponse
+    {
+        $start         = $request->getStart();
+        $end           = $request->getEnd();
+        $assetAccounts = $request->getAssetAccounts();
+        $income        = $this->opsRepository->sumIncomeByDestination($start, $end, $assetAccounts);
+        $result        = [];
+        /** @var array $entry */
+        foreach ($income as $entry) {
+            $result[] = [
+                'id'               => (string) $entry['id'],
+                'name'             => $entry['name'],
+                'difference'       => $entry['sum'],
+                'difference_float' => (float) $entry['sum'],
+                'currency_id'      => (string) $entry['currency_id'],
+                'currency_code'    => $entry['currency_code'],
+            ];
+        }
+
+        return response()->json($result);
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/insight/insightIncomeRevenue
+     *
+     * @param GenericRequest $request
+     *
+     * @return JsonResponse
+     */
+    public function revenue(GenericRequest $request): JsonResponse
+    {
+        $start           = $request->getStart();
+        $end             = $request->getEnd();
+        $assetAccounts   = $request->getAssetAccounts();
+        $revenueAccounts = $request->getRevenueAccounts();
+        $income          = $this->opsRepository->sumIncomeBySource($start, $end, $assetAccounts, $revenueAccounts);
+        $result          = [];
+
+        /** @var array $entry */
+        foreach ($income as $entry) {
+            $result[] = [
+                'id'               => (string) $entry['id'],
+                'name'             => $entry['name'],
+                'difference'       => $entry['sum'],
+                'difference_float' => (float) $entry['sum'],
+                'currency_id'      => (string) $entry['currency_id'],
+                'currency_code'    => $entry['currency_code'],
+            ];
+        }
+
+        return response()->json($result);
+    }
+
+}

app/Api/V1/Controllers/Insight/Income/CategoryController.php

@@ -0,0 +1,133 @@
+<?php
+
+/*
+ * CategoryController.php
+ * Copyright (c) 2021 james@firefly-iii.org
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Api\V1\Controllers\Insight\Income;
+
+use FireflyIII\Api\V1\Controllers\Controller;
+use FireflyIII\Api\V1\Requests\Insight\GenericRequest;
+use FireflyIII\Models\Category;
+use FireflyIII\Repositories\Category\CategoryRepositoryInterface;
+use FireflyIII\Repositories\Category\NoCategoryRepositoryInterface;
+use FireflyIII\Repositories\Category\OperationsRepositoryInterface;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Support\Collection;
+
+/**
+ * Class CategoryController
+ */
+class CategoryController extends Controller
+{
+    private NoCategoryRepositoryInterface $noRepository;
+    private OperationsRepositoryInterface $opsRepository;
+    private CategoryRepositoryInterface   $repository;
+
+    /**
+     * AccountController constructor.
+     *
+     * @codeCoverageIgnore
+     */
+    public function __construct()
+    {
+        parent::__construct();
+        $this->middleware(
+            function ($request, $next) {
+                $this->opsRepository = app(OperationsRepositoryInterface::class);
+                $this->repository    = app(CategoryRepositoryInterface::class);
+                $this->noRepository  = app(NoCategoryRepositoryInterface::class);
+                $user                = auth()->user();
+                $this->opsRepository->setUser($user);
+                $this->repository->setUser($user);
+                $this->noRepository->setUser($user);
+
+                return $next($request);
+            }
+        );
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/insight/insightIncomeCategory
+     *
+     * @param GenericRequest $request
+     *
+     * @return JsonResponse
+     */
+    public function category(GenericRequest $request): JsonResponse
+    {
+        $start         = $request->getStart();
+        $end           = $request->getEnd();
+        $categories    = $request->getCategories();
+        $assetAccounts = $request->getAssetAccounts();
+        $result        = [];
+        if (0 === $categories->count()) {
+            $categories = $this->repository->getCategories();
+        }
+        /** @var Category $category */
+        foreach ($categories as $category) {
+            $expenses = $this->opsRepository->sumIncome($start, $end, $assetAccounts, new Collection([$category]));
+            /** @var array $expense */
+            foreach ($expenses as $expense) {
+                $result[] = [
+                    'id'               => (string) $category->id,
+                    'name'             => $category->name,
+                    'difference'       => $expense['sum'],
+                    'difference_float' => (float) $expense['sum'],
+                    'currency_id'      => (string) $expense['currency_id'],
+                    'currency_code'    => $expense['currency_code'],
+                ];
+            }
+        }
+
+        return response()->json($result);
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/insight/insightIncomeNoCategory
+     *
+     * @param GenericRequest $request
+     *
+     * @return JsonResponse
+     */
+    public function noCategory(GenericRequest $request): JsonResponse
+    {
+        $start         = $request->getStart();
+        $end           = $request->getEnd();
+        $assetAccounts = $request->getAssetAccounts();
+        $result        = [];
+        $expenses      = $this->noRepository->sumIncome($start, $end, $assetAccounts);
+        /** @var array $expense */
+        foreach ($expenses as $expense) {
+            $result[] = [
+                'difference'       => $expense['sum'],
+                'difference_float' => (float) $expense['sum'],
+                'currency_id'      => (string) $expense['currency_id'],
+                'currency_code'    => $expense['currency_code'],
+            ];
+        }
+
+        return response()->json($result);
+
+    }
+}

app/Api/V1/Controllers/Insight/Income/PeriodController.php

@@ -0,0 +1,88 @@
+<?php
+/*
+ * PeriodController.php
+ * Copyright (c) 2021 james@firefly-iii.org
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Api\V1\Controllers\Insight\Income;
+
+use FireflyIII\Api\V1\Controllers\Controller;
+use FireflyIII\Api\V1\Requests\Insight\GenericRequest;
+use FireflyIII\Helpers\Collector\GroupCollectorInterface;
+use FireflyIII\Models\TransactionType;
+use Illuminate\Http\JsonResponse;
+
+/**
+ * Class PeriodController
+ */
+class PeriodController extends Controller
+{
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/insight/insightIncomeTotal
+     *
+     * @param GenericRequest $request
+     *
+     * @return JsonResponse
+     */
+    public function total(GenericRequest $request): JsonResponse
+    {
+        $accounts = $request->getAssetAccounts();
+        $start    = $request->getStart();
+        $end      = $request->getEnd();
+        $response = [];
+
+        // collect all expenses in this period (regardless of type)
+        $collector = app(GroupCollectorInterface::class);
+        $collector->setTypes([TransactionType::DEPOSIT])->setRange($start, $end)->setDestinationAccounts($accounts);
+        $genericSet = $collector->getExtractedJournals();
+        foreach ($genericSet as $journal) {
+            $currencyId        = (int) $journal['currency_id'];
+            $foreignCurrencyId = (int) $journal['foreign_currency_id'];
+
+            if (0 !== $currencyId) {
+                $response[$currencyId]                     = $response[$currencyId] ?? [
+                        'difference'       => '0',
+                        'difference_float' => 0,
+                        'currency_id'      => (string) $currencyId,
+                        'currency_code'    => $journal['currency_code'],
+                    ];
+                $response[$currencyId]['difference']       = bcadd($response[$currencyId]['difference'], app('steam')->positive($journal['amount']));
+                $response[$currencyId]['difference_float'] = (float) $response[$currencyId]['difference'];
+            }
+            if (0 !== $foreignCurrencyId) {
+                $response[$foreignCurrencyId]                     = $response[$foreignCurrencyId] ?? [
+                        'difference'       => '0',
+                        'difference_float' => 0,
+                        'currency_id'      => (string) $foreignCurrencyId,
+                        'currency_code'    => $journal['foreign_currency_code'],
+                    ];
+                $response[$foreignCurrencyId]['difference']       = bcadd(
+                    $response[$foreignCurrencyId]['difference'], app('steam')->positive($journal['foreign_amount'])
+                );
+                $response[$foreignCurrencyId]['difference_float'] = (float) $response[$foreignCurrencyId]['difference'];
+            }
+        }
+
+        return response()->json(array_values($response));
+    }
+
+}

app/Api/V1/Controllers/Insight/Income/TagController.php

@@ -0,0 +1,185 @@
+<?php
+
+/*
+ * TagController.php
+ * Copyright (c) 2021 james@firefly-iii.org
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Api\V1\Controllers\Insight\Income;
+
+use FireflyIII\Api\V1\Controllers\Controller;
+use FireflyIII\Api\V1\Requests\Insight\GenericRequest;
+use FireflyIII\Helpers\Collector\GroupCollectorInterface;
+use FireflyIII\Models\TransactionType;
+use FireflyIII\Repositories\Tag\TagRepositoryInterface;
+use Illuminate\Http\JsonResponse;
+
+/**
+ * Class TagController
+ */
+class TagController extends Controller
+{
+    private TagRepositoryInterface $repository;
+
+    /**
+     * TagController constructor.
+     */
+    public function __construct()
+    {
+        parent::__construct();
+        $this->middleware(
+            function ($request, $next) {
+                $user             = auth()->user();
+                $this->repository = app(TagRepositoryInterface::class);
+                $this->repository->setUser($user);
+
+                return $next($request);
+            }
+        );
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/insight/insightIncomeTag
+     *
+     * Expenses for no tag filtered by account.
+     *
+     * @param GenericRequest $request
+     *
+     * @return JsonResponse
+     */
+    public function noTag(GenericRequest $request): JsonResponse
+    {
+        $accounts = $request->getAssetAccounts();
+        $start    = $request->getStart();
+        $end      = $request->getEnd();
+        $response = [];
+
+        // collect all expenses in this period (regardless of type) by the given bills and accounts.
+        $collector = app(GroupCollectorInterface::class);
+        $collector->setTypes([TransactionType::DEPOSIT])->setRange($start, $end)->setDestinationAccounts($accounts);
+        $collector->withoutTags();
+
+        $genericSet = $collector->getExtractedJournals();
+
+        foreach ($genericSet as $journal) {
+            $currencyId        = (int) $journal['currency_id'];
+            $foreignCurrencyId = (int) $journal['foreign_currency_id'];
+
+            if (0 !== $currencyId) {
+                $response[$currencyId]                     = $response[$currencyId] ?? [
+                        'difference'       => '0',
+                        'difference_float' => 0,
+                        'currency_id'      => (string) $currencyId,
+                        'currency_code'    => $journal['currency_code'],
+                    ];
+                $response[$currencyId]['difference']       = bcadd($response[$currencyId]['difference'], app('steam')->positive($journal['amount']));
+                $response[$currencyId]['difference_float'] = (float) $response[$currencyId]['difference'];
+            }
+            if (0 !== $foreignCurrencyId) {
+                $response[$foreignCurrencyId]                     = $response[$foreignCurrencyId] ?? [
+                        'difference'       => '0',
+                        'difference_float' => 0,
+                        'currency_id'      => (string) $foreignCurrencyId,
+                        'currency_code'    => $journal['foreign_currency_code'],
+                    ];
+                $response[$foreignCurrencyId]['difference']       = bcadd(
+                    $response[$foreignCurrencyId]['difference'], app('steam')->positive($journal['foreign_amount'])
+                );
+                $response[$foreignCurrencyId]['difference_float'] = (float) $response[$foreignCurrencyId]['difference'];
+            }
+        }
+
+        return response()->json(array_values($response));
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/insight/insightIncomeNoTag
+     *
+     * Expenses per tag, possibly filtered by tag and account.
+     *
+     * @param GenericRequest $request
+     *
+     * @return JsonResponse
+     */
+    public function tag(GenericRequest $request): JsonResponse
+    {
+        $accounts = $request->getAssetAccounts();
+        $tags     = $request->getTags();
+        $start    = $request->getStart();
+        $end      = $request->getEnd();
+        $response = [];
+
+        // get all tags:
+        if (0 === $tags->count()) {
+            $tags = $this->repository->get();
+        }
+
+        // collect all expenses in this period (regardless of type) by the given bills and accounts.
+        $collector = app(GroupCollectorInterface::class);
+        $collector->setTypes([TransactionType::DEPOSIT])->setRange($start, $end)->setDestinationAccounts($accounts);
+        $collector->setTags($tags);
+        $genericSet = $collector->getExtractedJournals();
+        /** @var array $journal */
+        foreach ($genericSet as $journal) {
+            $currencyId        = (int) $journal['currency_id'];
+            $foreignCurrencyId = (int) $journal['foreign_currency_id'];
+
+            /** @var array $tag */
+            foreach ($journal['tags'] as $tag) {
+                $tagId      = $tag['id'];
+                $key        = sprintf('%d-%d', $tagId, $currencyId);
+                $foreignKey = sprintf('%d-%d', $tagId, $foreignCurrencyId);
+
+                // on currency ID
+                if (0 !== $currencyId) {
+                    $response[$key]                     = $response[$key] ?? [
+                            'id'               => (string) $tagId,
+                            'name'             => $tag['name'],
+                            'difference'       => '0',
+                            'difference_float' => 0,
+                            'currency_id'      => (string) $currencyId,
+                            'currency_code'    => $journal['currency_code'],
+                        ];
+                    $response[$key]['difference']       = bcadd($response[$key]['difference'], app('steam')->positive($journal['amount']));
+                    $response[$key]['difference_float'] = (float) $response[$key]['difference'];
+                }
+
+                // on foreign ID
+                if (0 !== $foreignCurrencyId) {
+                    $response[$foreignKey]                     = $journal[$foreignKey] ?? [
+                            'difference'       => '0',
+                            'difference_float' => 0,
+                            'currency_id'      => (string) $foreignCurrencyId,
+                            'currency_code'    => $journal['foreign_currency_code'],
+                        ];
+                    $response[$foreignKey]['difference']       = bcadd(
+                        $response[$foreignKey]['difference'], app('steam')->positive($journal['foreign_amount'])
+                    );
+                    $response[$foreignKey]['difference_float'] = (float) $response[$foreignKey]['difference'];
+                }
+            }
+        }
+
+        return response()->json(array_values($response));
+    }
+
+}

app/Api/V1/Controllers/Insight/Transfer/AccountController.php

@@ -0,0 +1,77 @@
+<?php
+/*
+ * AccountController.php
+ * Copyright (c) 2021 james@firefly-iii.org
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Api\V1\Controllers\Insight\Transfer;
+
+use FireflyIII\Api\V1\Controllers\Controller;
+use FireflyIII\Api\V1\Requests\Insight\GenericRequest;
+use FireflyIII\Repositories\Account\OperationsRepositoryInterface;
+use FireflyIII\Support\Http\Api\ApiSupport;
+use Illuminate\Http\JsonResponse;
+
+/**
+ * Class AccountController
+ */
+class AccountController extends Controller
+{
+    use ApiSupport;
+
+    private OperationsRepositoryInterface $opsRepository;
+
+    /**
+     * AccountController constructor.
+     *
+     * @codeCoverageIgnore
+     */
+    public function __construct()
+    {
+        parent::__construct();
+        $this->middleware(
+            function ($request, $next) {
+                $user                = auth()->user();
+                $this->opsRepository = app(OperationsRepositoryInterface::class);
+                $this->opsRepository->setUser($user);
+
+                return $next($request);
+            }
+        );
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/insight/insightTransfers
+     *
+     * @param GenericRequest $request
+     *
+     * @return JsonResponse
+     */
+    public function asset(GenericRequest $request): JsonResponse
+    {
+        $start         = $request->getStart();
+        $end           = $request->getEnd();
+        $assetAccounts = $request->getAssetAccounts();
+        $transfers     = $this->opsRepository->sumTransfers($start, $end, $assetAccounts);
+
+        return response()->json($transfers);
+    }
+}

app/Api/V1/Controllers/Insight/Transfer/CategoryController.php

@@ -0,0 +1,132 @@
+<?php
+/*
+ * CategoryController.php
+ * Copyright (c) 2021 james@firefly-iii.org
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Api\V1\Controllers\Insight\Transfer;
+
+use FireflyIII\Api\V1\Controllers\Controller;
+use FireflyIII\Api\V1\Requests\Insight\GenericRequest;
+use FireflyIII\Models\Category;
+use FireflyIII\Repositories\Category\CategoryRepositoryInterface;
+use FireflyIII\Repositories\Category\NoCategoryRepositoryInterface;
+use FireflyIII\Repositories\Category\OperationsRepositoryInterface;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Support\Collection;
+
+/**
+ * Class CategoryController
+ */
+class CategoryController extends Controller
+{
+    private NoCategoryRepositoryInterface $noRepository;
+    private OperationsRepositoryInterface $opsRepository;
+    private CategoryRepositoryInterface   $repository;
+
+    /**
+     * AccountController constructor.
+     *
+     * @codeCoverageIgnore
+     */
+    public function __construct()
+    {
+        parent::__construct();
+        $this->middleware(
+            function ($request, $next) {
+                $this->opsRepository = app(OperationsRepositoryInterface::class);
+                $this->repository    = app(CategoryRepositoryInterface::class);
+                $this->noRepository  = app(NoCategoryRepositoryInterface::class);
+                $user                = auth()->user();
+                $this->opsRepository->setUser($user);
+                $this->repository->setUser($user);
+                $this->noRepository->setUser($user);
+
+                return $next($request);
+            }
+        );
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/insight/insightTransferCategory
+     *
+     * @param GenericRequest $request
+     *
+     * @return JsonResponse
+     */
+    public function category(GenericRequest $request): JsonResponse
+    {
+        $start         = $request->getStart();
+        $end           = $request->getEnd();
+        $categories    = $request->getCategories();
+        $assetAccounts = $request->getAssetAccounts();
+        $result        = [];
+        if (0 === $categories->count()) {
+            $categories = $this->repository->getCategories();
+        }
+        /** @var Category $category */
+        foreach ($categories as $category) {
+            $expenses = $this->opsRepository->sumTransfers($start, $end, $assetAccounts, new Collection([$category]));
+            /** @var array $expense */
+            foreach ($expenses as $expense) {
+                $result[] = [
+                    'id'               => (string) $category->id,
+                    'name'             => $category->name,
+                    'difference'       => $expense['sum'],
+                    'difference_float' => (float) $expense['sum'],
+                    'currency_id'      => (string) $expense['currency_id'],
+                    'currency_code'    => $expense['currency_code'],
+                ];
+            }
+        }
+
+        return response()->json($result);
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/insight/insightTransferNoCategory
+     *
+     * @param GenericRequest $request
+     *
+     * @return JsonResponse
+     */
+    public function noCategory(GenericRequest $request): JsonResponse
+    {
+        $start         = $request->getStart();
+        $end           = $request->getEnd();
+        $assetAccounts = $request->getAssetAccounts();
+        $result        = [];
+        $expenses      = $this->noRepository->sumTransfers($start, $end, $assetAccounts);
+        /** @var array $expense */
+        foreach ($expenses as $expense) {
+            $result[] = [
+                'difference'       => $expense['sum'],
+                'difference_float' => (float) $expense['sum'],
+                'currency_id'      => (string) $expense['currency_id'],
+                'currency_code'    => $expense['currency_code'],
+            ];
+        }
+
+        return response()->json($result);
+
+    }
+}

app/Api/V1/Controllers/Insight/Transfer/PeriodController.php

@@ -0,0 +1,88 @@
+<?php
+/*
+ * PeriodController.php
+ * Copyright (c) 2021 james@firefly-iii.org
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Api\V1\Controllers\Insight\Transfer;
+
+use FireflyIII\Api\V1\Controllers\Controller;
+use FireflyIII\Api\V1\Requests\Insight\GenericRequest;
+use FireflyIII\Helpers\Collector\GroupCollectorInterface;
+use FireflyIII\Models\TransactionType;
+use Illuminate\Http\JsonResponse;
+
+/**
+ * Class PeriodController
+ */
+class PeriodController extends Controller
+{
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/insight/insightTransferTotal
+     *
+     * @param GenericRequest $request
+     *
+     * @return JsonResponse
+     */
+    public function total(GenericRequest $request): JsonResponse
+    {
+        $accounts = $request->getAssetAccounts();
+        $start    = $request->getStart();
+        $end      = $request->getEnd();
+        $response = [];
+
+        // collect all expenses in this period (regardless of type)
+        $collector = app(GroupCollectorInterface::class);
+        $collector->setTypes([TransactionType::TRANSFER])->setRange($start, $end)->setDestinationAccounts($accounts);
+        $genericSet = $collector->getExtractedJournals();
+        foreach ($genericSet as $journal) {
+            $currencyId        = (int) $journal['currency_id'];
+            $foreignCurrencyId = (int) $journal['foreign_currency_id'];
+
+            if (0 !== $currencyId) {
+                $response[$currencyId]                     = $response[$currencyId] ?? [
+                        'difference'       => '0',
+                        'difference_float' => 0,
+                        'currency_id'      => (string) $currencyId,
+                        'currency_code'    => $journal['currency_code'],
+                    ];
+                $response[$currencyId]['difference']       = bcadd($response[$currencyId]['difference'], app('steam')->positive($journal['amount']));
+                $response[$currencyId]['difference_float'] = (float) $response[$currencyId]['difference'];
+            }
+            if (0 !== $foreignCurrencyId) {
+                $response[$foreignCurrencyId]                     = $response[$foreignCurrencyId] ?? [
+                        'difference'       => '0',
+                        'difference_float' => 0,
+                        'currency_id'      => (string) $foreignCurrencyId,
+                        'currency_code'    => $journal['foreign_currency_code'],
+                    ];
+                $response[$foreignCurrencyId]['difference']       = bcadd(
+                    $response[$foreignCurrencyId]['difference'], app('steam')->positive($journal['foreign_amount'])
+                );
+                $response[$foreignCurrencyId]['difference_float'] = (float) $response[$foreignCurrencyId]['difference'];
+            }
+        }
+
+        return response()->json(array_values($response));
+    }
+
+}

app/Api/V1/Controllers/Insight/Transfer/TagController.php

@@ -0,0 +1,181 @@
+<?php
+/*
+ * TagController.php
+ * Copyright (c) 2021 james@firefly-iii.org
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Api\V1\Controllers\Insight\Transfer;
+
+use FireflyIII\Api\V1\Controllers\Controller;
+use FireflyIII\Api\V1\Requests\Insight\GenericRequest;
+use FireflyIII\Helpers\Collector\GroupCollectorInterface;
+use FireflyIII\Models\TransactionType;
+use FireflyIII\Repositories\Tag\TagRepositoryInterface;
+use Illuminate\Http\JsonResponse;
+
+/**
+ * Class TagController
+ */
+class TagController extends Controller
+{
+    private TagRepositoryInterface $repository;
+
+    /**
+     * TagController constructor.
+     */
+    public function __construct()
+    {
+        parent::__construct();
+        $this->middleware(
+            function ($request, $next) {
+                $user             = auth()->user();
+                $this->repository = app(TagRepositoryInterface::class);
+                $this->repository->setUser($user);
+
+                return $next($request);
+            }
+        );
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/insight/insightTransferNoTag
+     *
+     * @param GenericRequest $request
+     *
+     * @return JsonResponse
+     */
+    public function noTag(GenericRequest $request): JsonResponse
+    {
+        $accounts = $request->getAssetAccounts();
+        $start    = $request->getStart();
+        $end      = $request->getEnd();
+        $response = [];
+
+        // collect all expenses in this period (regardless of type) by the given bills and accounts.
+        $collector = app(GroupCollectorInterface::class);
+        $collector->setTypes([TransactionType::TRANSFER])->setRange($start, $end)->setDestinationAccounts($accounts);
+        $collector->withoutTags();
+
+        $genericSet = $collector->getExtractedJournals();
+
+        foreach ($genericSet as $journal) {
+            $currencyId        = (int) $journal['currency_id'];
+            $foreignCurrencyId = (int) $journal['foreign_currency_id'];
+
+            if (0 !== $currencyId) {
+                $response[$currencyId]                     = $response[$currencyId] ?? [
+                        'difference'       => '0',
+                        'difference_float' => 0,
+                        'currency_id'      => (string) $currencyId,
+                        'currency_code'    => $journal['currency_code'],
+                    ];
+                $response[$currencyId]['difference']       = bcadd($response[$currencyId]['difference'], app('steam')->positive($journal['amount']));
+                $response[$currencyId]['difference_float'] = (float) $response[$currencyId]['difference'];
+            }
+            if (0 !== $foreignCurrencyId) {
+                $response[$foreignCurrencyId]                     = $response[$foreignCurrencyId] ?? [
+                        'difference'       => '0',
+                        'difference_float' => 0,
+                        'currency_id'      => (string) $foreignCurrencyId,
+                        'currency_code'    => $journal['foreign_currency_code'],
+                    ];
+                $response[$foreignCurrencyId]['difference']       = bcadd(
+                    $response[$foreignCurrencyId]['difference'], app('steam')->positive($journal['foreign_amount'])
+                );
+                $response[$foreignCurrencyId]['difference_float'] = (float) $response[$foreignCurrencyId]['difference'];
+            }
+        }
+
+        return response()->json(array_values($response));
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/insight/insightTransferTag
+     *
+     * Transfers per tag, possibly filtered by tag and account.
+     *
+     * @param GenericRequest $request
+     *
+     * @return JsonResponse
+     */
+    public function tag(GenericRequest $request): JsonResponse
+    {
+        $accounts = $request->getAssetAccounts();
+        $tags     = $request->getTags();
+        $start    = $request->getStart();
+        $end      = $request->getEnd();
+        $response = [];
+
+        // get all tags:
+        if (0 === $tags->count()) {
+            $tags = $this->repository->get();
+        }
+
+        // collect all expenses in this period (regardless of type) by the given bills and accounts.
+        $collector = app(GroupCollectorInterface::class);
+        $collector->setTypes([TransactionType::TRANSFER])->setRange($start, $end)->setDestinationAccounts($accounts);
+        $collector->setTags($tags);
+        $genericSet = $collector->getExtractedJournals();
+        /** @var array $journal */
+        foreach ($genericSet as $journal) {
+            $currencyId        = (int) $journal['currency_id'];
+            $foreignCurrencyId = (int) $journal['foreign_currency_id'];
+
+            /** @var array $tag */
+            foreach ($journal['tags'] as $tag) {
+                $tagId      = $tag['id'];
+                $key        = sprintf('%d-%d', $tagId, $currencyId);
+                $foreignKey = sprintf('%d-%d', $tagId, $foreignCurrencyId);
+
+                // on currency ID
+                if (0 !== $currencyId) {
+                    $response[$key]                     = $response[$key] ?? [
+                            'id'               => (string) $tagId,
+                            'name'             => $tag['name'],
+                            'difference'       => '0',
+                            'difference_float' => 0,
+                            'currency_id'      => (string) $currencyId,
+                            'currency_code'    => $journal['currency_code'],
+                        ];
+                    $response[$key]['difference']       = bcadd($response[$key]['difference'], app('steam')->positive($journal['amount']));
+                    $response[$key]['difference_float'] = (float) $response[$key]['difference'];
+                }
+
+                // on foreign ID
+                if (0 !== $foreignCurrencyId) {
+                    $response[$foreignKey]                     = $journal[$foreignKey] ?? [
+                            'difference'       => '0',
+                            'difference_float' => 0,
+                            'currency_id'      => (string) $foreignCurrencyId,
+                            'currency_code'    => $journal['foreign_currency_code'],
+                        ];
+                    $response[$foreignKey]['difference']       = bcadd(
+                        $response[$foreignKey]['difference'], app('steam')->positive($journal['foreign_amount'])
+                    );
+                    $response[$foreignKey]['difference_float'] = (float) $response[$foreignKey]['difference'];
+                }
+            }
+        }
+
+        return response()->json(array_values($response));
+    }
+}

app/Api/V1/Controllers/LinkTypeController.php

@@ -1,273 +0,0 @@
-<?php
-/**
- * LinkTypeController.php
- * Copyright (c) 2019 james@firefly-iii.org
- *
- * This file is part of Firefly III (https://github.com/firefly-iii).
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as
- * published by the Free Software Foundation, either version 3 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
-
-declare(strict_types=1);
-
-namespace FireflyIII\Api\V1\Controllers;
-
-use FireflyIII\Api\V1\Requests\LinkTypeRequest;
-use FireflyIII\Exceptions\FireflyException;
-use FireflyIII\Helpers\Collector\GroupCollectorInterface;
-use FireflyIII\Models\LinkType;
-use FireflyIII\Repositories\LinkType\LinkTypeRepositoryInterface;
-use FireflyIII\Repositories\User\UserRepositoryInterface;
-use FireflyIII\Support\Http\Api\TransactionFilter;
-use FireflyIII\Transformers\LinkTypeTransformer;
-use FireflyIII\Transformers\TransactionGroupTransformer;
-use FireflyIII\User;
-use Illuminate\Http\JsonResponse;
-use Illuminate\Http\Request;
-use Illuminate\Pagination\LengthAwarePaginator;
-use League\Fractal\Pagination\IlluminatePaginatorAdapter;
-use League\Fractal\Resource\Collection as FractalCollection;
-use League\Fractal\Resource\Item;
-
-/**
- * Class LinkTypeController.
- */
-class LinkTypeController extends Controller
-{
-    use TransactionFilter;
-
-    /** @var LinkTypeRepositoryInterface The link type repository */
-    private $repository;
-
-    /** @var UserRepositoryInterface The user repository */
-    private $userRepository;
-
-
-    /**
-     * LinkTypeController constructor.
-     *
-     * @codeCoverageIgnore
-     */
-    public function __construct()
-    {
-        parent::__construct();
-        $this->middleware(
-            function ($request, $next) {
-                /** @var User $user */
-                $user                 = auth()->user();
-                $this->repository     = app(LinkTypeRepositoryInterface::class);
-                $this->userRepository = app(UserRepositoryInterface::class);
-                $this->repository->setUser($user);
-
-                return $next($request);
-            }
-        );
-    }
-
-    /**
-     * Delete the resource.
-     *
-     * @param LinkType $linkType
-     *
-     * @throws FireflyException
-     * @codeCoverageIgnore
-     * @return JsonResponse
-     */
-    public function delete(LinkType $linkType): JsonResponse
-    {
-        if (false === $linkType->editable) {
-            throw new FireflyException('200020: Link type cannot be changed.');
-        }
-        $this->repository->destroy($linkType);
-
-        return response()->json([], 204);
-    }
-
-    /**
-     * List all of them.
-     *
-     * @return JsonResponse
-     * @codeCoverageIgnore
-     */
-    public function index(): JsonResponse
-    {
-        // create some objects:
-        $manager  = $this->getManager();
-        $pageSize = (int) app('preferences')->getForUser(auth()->user(), 'listPageSize', 50)->data;
-
-        // get list of accounts. Count it and split it.
-        $collection = $this->repository->get();
-        $count      = $collection->count();
-        $linkTypes  = $collection->slice(($this->parameters->get('page') - 1) * $pageSize, $pageSize);
-
-        // make paginator:
-        $paginator = new LengthAwarePaginator($linkTypes, $count, $pageSize, $this->parameters->get('page'));
-        $paginator->setPath(route('api.v1.link_types.index') . $this->buildParams());
-
-        /** @var LinkTypeTransformer $transformer */
-        $transformer = app(LinkTypeTransformer::class);
-        $transformer->setParameters($this->parameters);
-
-        $resource = new FractalCollection($linkTypes, $transformer, 'link_types');
-        $resource->setPaginator(new IlluminatePaginatorAdapter($paginator));
-
-        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', 'application/vnd.api+json');
-
-    }
-
-    /**
-     * List single resource.
-     *
-     * @param LinkType $linkType
-     *
-     * @return JsonResponse
-     * @codeCoverageIgnore
-     */
-    public function show(LinkType $linkType): JsonResponse
-    {
-        $manager = $this->getManager();
-        /** @var LinkTypeTransformer $transformer */
-        $transformer = app(LinkTypeTransformer::class);
-        $transformer->setParameters($this->parameters);
-
-        $resource = new Item($linkType, $transformer, 'link_types');
-
-        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', 'application/vnd.api+json');
-
-    }
-
-    /**
-     * Store new object.
-     *
-     * @param LinkTypeRequest $request
-     *
-     * @throws FireflyException
-     * @return JsonResponse
-     */
-    public function store(LinkTypeRequest $request): JsonResponse
-    {
-        /** @var User $admin */
-        $admin = auth()->user();
-
-        if (!$this->userRepository->hasRole($admin, 'owner')) {
-            throw new FireflyException('200005: You need the "owner" role to do this.'); // @codeCoverageIgnore
-        }
-        $data = $request->getAll();
-        // if currency ID is 0, find the currency by the code:
-        $linkType = $this->repository->store($data);
-        $manager  = $this->getManager();
-
-        /** @var LinkTypeTransformer $transformer */
-        $transformer = app(LinkTypeTransformer::class);
-        $transformer->setParameters($this->parameters);
-        $resource = new Item($linkType, $transformer, 'link_types');
-
-        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', 'application/vnd.api+json');
-
-    }
-
-    /**
-     * Delete the resource.
-     *
-     * @param Request  $request
-     * @param LinkType $linkType
-     *
-     * @return JsonResponse
-     * @codeCoverageIgnore
-     */
-    public function transactions(Request $request, LinkType $linkType): JsonResponse
-    {
-        $pageSize = (int) app('preferences')->getForUser(auth()->user(), 'listPageSize', 50)->data;
-        $type     = $request->get('type') ?? 'default';
-        $this->parameters->set('type', $type);
-
-        $types   = $this->mapTransactionTypes($this->parameters->get('type'));
-        $manager = $this->getManager();
-
-        // whatever is returned by the query, it must be part of these journals:
-        $journalIds = $this->repository->getJournalIds($linkType);
-
-        /** @var User $admin */
-        $admin = auth()->user();
-
-        // use new group collector:
-        /** @var GroupCollectorInterface $collector */
-        $collector = app(GroupCollectorInterface::class);
-        $collector
-            ->setUser($admin)
-            // filter on journal IDs.
-            ->setJournalIds($journalIds)
-            // all info needed for the API:
-            ->withAPIInformation()
-            // set page size:
-            ->setLimit($pageSize)
-            // set page to retrieve
-            ->setPage($this->parameters->get('page'))
-            // set types of transactions to return.
-            ->setTypes($types);
-
-
-        if (null !== $this->parameters->get('start') && null !== $this->parameters->get('end')) {
-            $collector->setRange($this->parameters->get('start'), $this->parameters->get('end'));
-        }
-        $paginator = $collector->getPaginatedGroups();
-        $paginator->setPath(route('api.v1.transactions.index') . $this->buildParams());
-        $transactions = $paginator->getCollection();
-
-        /** @var TransactionGroupTransformer $transformer */
-        $transformer = app(TransactionGroupTransformer::class);
-        $transformer->setParameters($this->parameters);
-
-        $resource = new FractalCollection($transactions, $transformer, 'transactions');
-        $resource->setPaginator(new IlluminatePaginatorAdapter($paginator));
-
-        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', 'application/vnd.api+json');
-    }
-
-
-    /**
-     * Update object.
-     *
-     * @param LinkTypeRequest $request
-     * @param LinkType        $linkType
-     *
-     * @throws FireflyException
-     * @return JsonResponse
-     */
-    public function update(LinkTypeRequest $request, LinkType $linkType): JsonResponse
-    {
-        if (false === $linkType->editable) {
-            throw new FireflyException('200020: Link type cannot be changed.');
-        }
-
-        /** @var User $admin */
-        $admin = auth()->user();
-
-        if (!$this->userRepository->hasRole($admin, 'owner')) {
-            throw new FireflyException('200005: You need the "owner" role to do this.'); // @codeCoverageIgnore
-        }
-
-        $data = $request->getAll();
-        $this->repository->update($linkType, $data);
-        $manager = $this->getManager();
-        /** @var LinkTypeTransformer $transformer */
-        $transformer = app(LinkTypeTransformer::class);
-        $transformer->setParameters($this->parameters);
-
-        $resource = new Item($linkType, $transformer, 'link_types');
-
-        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', 'application/vnd.api+json');
-
-    }
-}

app/Api/V1/Controllers/Models/Account/DestroyController.php

@@ -0,0 +1,75 @@
+<?php
+/**
+ * AccountController.php
+ * Copyright (c) 2019 james@firefly-iii.org
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Api\V1\Controllers\Models\Account;
+
+use FireflyIII\Api\V1\Controllers\Controller;
+use FireflyIII\Models\Account;
+use FireflyIII\Repositories\Account\AccountRepositoryInterface;
+use Illuminate\Http\JsonResponse;
+
+/**
+ * Class DestroyController
+ */
+class DestroyController extends Controller
+{
+    public const RESOURCE_KEY = 'accounts';
+
+    private AccountRepositoryInterface $repository;
+
+    /**
+     * AccountController constructor.
+     *
+     * @codeCoverageIgnore
+     */
+    public function __construct()
+    {
+        parent::__construct();
+        $this->middleware(
+            function ($request, $next) {
+                $this->repository = app(AccountRepositoryInterface::class);
+                $this->repository->setUser(auth()->user());
+
+                return $next($request);
+            }
+        );
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/accounts/deleteAccount
+     *
+     * Remove the specified resource from storage.
+     *
+     * @param Account $account
+     *
+     * @codeCoverageIgnore
+     * @return JsonResponse
+     */
+    public function destroy(Account $account): JsonResponse
+    {
+        $this->repository->destroy($account, null);
+
+        return response()->json([], 204);
+    }
+}

app/Api/V1/Controllers/Models/Account/ListController.php

@@ -21,16 +21,14 @@
 
 declare(strict_types=1);
 
-namespace FireflyIII\Api\V1\Controllers;
+namespace FireflyIII\Api\V1\Controllers\Models\Account;
 
-use FireflyIII\Api\V1\Requests\AccountStoreRequest;
-use FireflyIII\Api\V1\Requests\AccountUpdateRequest;
+use FireflyIII\Api\V1\Controllers\Controller;
+use FireflyIII\Exceptions\FireflyException;
 use FireflyIII\Helpers\Collector\GroupCollectorInterface;
 use FireflyIII\Models\Account;
 use FireflyIII\Repositories\Account\AccountRepositoryInterface;
-use FireflyIII\Support\Http\Api\AccountFilter;
 use FireflyIII\Support\Http\Api\TransactionFilter;
-use FireflyIII\Transformers\AccountTransformer;
 use FireflyIII\Transformers\AttachmentTransformer;
 use FireflyIII\Transformers\PiggyBankTransformer;
 use FireflyIII\Transformers\TransactionGroupTransformer;
@@ -41,20 +39,18 @@ use Illuminate\Pagination\LengthAwarePaginator;
 use Illuminate\Support\Collection;
 use League\Fractal\Pagination\IlluminatePaginatorAdapter;
 use League\Fractal\Resource\Collection as FractalCollection;
-use League\Fractal\Resource\Item;
 
 /**
- * Class AccountController.
+ * Class ListController
  */
-class AccountController extends Controller
+class ListController extends Controller
 {
-    use AccountFilter, TransactionFilter;
+    use TransactionFilter;
 
     public const RESOURCE_KEY = 'accounts';
 
     private AccountRepositoryInterface $repository;
 
-
     /**
      * AccountController constructor.
      *
@@ -65,11 +61,8 @@ class AccountController extends Controller
         parent::__construct();
         $this->middleware(
             function ($request, $next) {
-                /** @var User $user */
-                $user = auth()->user();
-                // @var AccountRepositoryInterface repository
                 $this->repository = app(AccountRepositoryInterface::class);
-                $this->repository->setUser($user);
+                $this->repository->setUser(auth()->user());
 
                 return $next($request);
             }
@@ -77,10 +70,14 @@ class AccountController extends Controller
     }
 
     /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/accounts/listAttachmentByAccount
+     *
      * @param Account $account
      *
      * @return JsonResponse
      * @codeCoverageIgnore
+     * @throws FireflyException
      */
     public function attachments(Account $account): JsonResponse
     {
@@ -102,69 +99,17 @@ class AccountController extends Controller
         $resource = new FractalCollection($attachments, $transformer, 'attachments');
         $resource->setPaginator(new IlluminatePaginatorAdapter($paginator));
 
-        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', 'application/vnd.api+json');
+        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', self::CONTENT_TYPE);
     }
 
     /**
-     * Remove the specified resource from storage.
-     *
-     * @param Account $account
-     *
-     * @codeCoverageIgnore
-     * @return JsonResponse
-     */
-    public function delete(Account $account): JsonResponse
-    {
-        $this->repository->destroy($account, null);
-
-        return response()->json([], 204);
-    }
-
-    /**
-     * Display a listing of the resource.
-     *
-     * @param Request $request
-     *
-     * @codeCoverageIgnore
-     * @return JsonResponse
-     */
-    public function index(Request $request): JsonResponse
-    {
-        $manager = $this->getManager();
-        $type    = $request->get('type') ?? 'all';
-        $this->parameters->set('type', $type);
-
-        // types to get, page size:
-        $types    = $this->mapAccountTypes($this->parameters->get('type'));
-        $pageSize = (int) app('preferences')->getForUser(auth()->user(), 'listPageSize', 50)->data;
-
-        // get list of accounts. Count it and split it.
-        $collection = $this->repository->getAccountsByType($types);
-        $count      = $collection->count();
-        $accounts   = $collection->slice(($this->parameters->get('page') - 1) * $pageSize, $pageSize);
-
-        // make paginator:
-        $paginator = new LengthAwarePaginator($accounts, $count, $pageSize, $this->parameters->get('page'));
-        $paginator->setPath(route('api.v1.accounts.index') . $this->buildParams());
-
-
-        /** @var AccountTransformer $transformer */
-        $transformer = app(AccountTransformer::class);
-        $transformer->setParameters($this->parameters);
-
-        $resource = new FractalCollection($accounts, $transformer, self::RESOURCE_KEY);
-        $resource->setPaginator(new IlluminatePaginatorAdapter($paginator));
-
-        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', 'application/vnd.api+json');
-    }
-
-
-    /**
-     * List all piggies.
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/accounts/listPiggyBankByAccount
      *
      * @param Account $account
      *
      * @return JsonResponse
+     * @throws FireflyException
      * @codeCoverageIgnore
      */
     public function piggyBanks(Account $account): JsonResponse
@@ -191,52 +136,14 @@ class AccountController extends Controller
         $resource = new FractalCollection($piggyBanks, $transformer, 'piggy_banks');
         $resource->setPaginator(new IlluminatePaginatorAdapter($paginator));
 
-        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', 'application/vnd.api+json');
+        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', self::CONTENT_TYPE);
 
     }
 
     /**
-     * Show single instance.
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/accounts/listTransactionByAccount
      *
-     * @param Account $account
-     *
-     * @return JsonResponse
-     */
-    public function show(Account $account): JsonResponse
-    {
-        $manager = $this->getManager();
-
-        /** @var AccountTransformer $transformer */
-        $transformer = app(AccountTransformer::class);
-        $transformer->setParameters($this->parameters);
-        $resource = new Item($account, $transformer, self::RESOURCE_KEY);
-
-        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', 'application/vnd.api+json');
-    }
-
-    /**
-     * Store a new instance.
-     *
-     * @param AccountStoreRequest $request
-     *
-     * @return JsonResponse
-     */
-    public function store(AccountStoreRequest $request): JsonResponse
-    {
-        $data    = $request->getAllAccountData();
-        $account = $this->repository->store($data);
-        $manager = $this->getManager();
-
-        /** @var AccountTransformer $transformer */
-        $transformer = app(AccountTransformer::class);
-        $transformer->setParameters($this->parameters);
-
-        $resource = new Item($account, $transformer, self::RESOURCE_KEY);
-
-        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', 'application/vnd.api+json');
-    }
-
-    /**
      * Show all transaction groups related to the account.
      *
      * @codeCoverageIgnore
@@ -245,6 +152,7 @@ class AccountController extends Controller
      * @param Account $account
      *
      * @return JsonResponse
+     * @throws FireflyException
      */
     public function transactions(Request $request, Account $account): JsonResponse
     {
@@ -283,29 +191,6 @@ class AccountController extends Controller
         $resource = new FractalCollection($groups, $transformer, 'transactions');
         $resource->setPaginator(new IlluminatePaginatorAdapter($paginator));
 
-        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', 'application/vnd.api+json');
-    }
-
-    /**
-     * Update account.
-     *
-     * @param AccountUpdateRequest $request
-     * @param Account              $account
-     *
-     * @return JsonResponse
-     */
-    public function update(AccountUpdateRequest $request, Account $account): JsonResponse
-    {
-        $data         = $request->getUpdateData();
-        $data['type'] = config('firefly.shortNamesByFullName.' . $account->accountType->type);
-        $this->repository->update($account, $data);
-        $manager = $this->getManager();
-
-        /** @var AccountTransformer $transformer */
-        $transformer = app(AccountTransformer::class);
-        $transformer->setParameters($this->parameters);
-        $resource = new Item($account, $transformer, self::RESOURCE_KEY);
-
-        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', 'application/vnd.api+json');
+        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', self::CONTENT_TYPE);
     }
 }

app/Api/V1/Controllers/Models/Account/ShowController.php

@@ -0,0 +1,139 @@
+<?php
+/*
+ * ShowController.php
+ * Copyright (c) 2021 james@firefly-iii.org
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Api\V1\Controllers\Models\Account;
+
+use FireflyIII\Api\V1\Controllers\Controller;
+use FireflyIII\Exceptions\FireflyException;
+use FireflyIII\Models\Account;
+use FireflyIII\Repositories\Account\AccountRepositoryInterface;
+use FireflyIII\Support\Http\Api\AccountFilter;
+use FireflyIII\Transformers\AccountTransformer;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Http\Request;
+use Illuminate\Pagination\LengthAwarePaginator;
+use League\Fractal\Pagination\IlluminatePaginatorAdapter;
+use League\Fractal\Resource\Collection as FractalCollection;
+use League\Fractal\Resource\Item;
+
+/**
+ * Class ShowController
+ */
+class ShowController extends Controller
+{
+    use AccountFilter;
+
+    public const RESOURCE_KEY = 'accounts';
+
+    private AccountRepositoryInterface $repository;
+
+    /**
+     * AccountController constructor.
+     *
+     * @codeCoverageIgnore
+     */
+    public function __construct()
+    {
+        parent::__construct();
+        $this->middleware(
+            function ($request, $next) {
+                $this->repository = app(AccountRepositoryInterface::class);
+                $this->repository->setUser(auth()->user());
+
+                return $next($request);
+            }
+        );
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/accounts/listAccount
+     *
+     * Display a listing of the resource.
+     *
+     * @param Request $request
+     *
+     * @return JsonResponse
+     * @throws FireflyException
+     * @codeCoverageIgnore
+     */
+    public function index(Request $request): JsonResponse
+    {
+        $manager = $this->getManager();
+        $type    = $request->get('type') ?? 'all';
+        $this->parameters->set('type', $type);
+
+        // types to get, page size:
+        $types    = $this->mapAccountTypes($this->parameters->get('type'));
+        $pageSize = (int) app('preferences')->getForUser(auth()->user(), 'listPageSize', 50)->data;
+
+        // get list of accounts. Count it and split it.
+        $this->repository->resetAccountOrder();
+        $collection = $this->repository->getAccountsByType($types, $this->parameters->get('sort') ?? []);
+        $count      = $collection->count();
+
+        // continue sort:
+
+
+        $accounts = $collection->slice(($this->parameters->get('page') - 1) * $pageSize, $pageSize);
+
+        // make paginator:
+        $paginator = new LengthAwarePaginator($accounts, $count, $pageSize, $this->parameters->get('page'));
+        $paginator->setPath(route('api.v1.accounts.index') . $this->buildParams());
+
+        /** @var AccountTransformer $transformer */
+        $transformer = app(AccountTransformer::class);
+        $transformer->setParameters($this->parameters);
+
+        $resource = new FractalCollection($accounts, $transformer, self::RESOURCE_KEY);
+        $resource->setPaginator(new IlluminatePaginatorAdapter($paginator));
+
+        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', self::CONTENT_TYPE);
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/accounts/getAccount
+     *
+     * Show single instance.
+     *
+     * @param Account $account
+     *
+     * @return JsonResponse
+     */
+    public function show(Account $account): JsonResponse
+    {
+        // get list of accounts. Count it and split it.
+        $this->repository->resetAccountOrder();
+        $account->refresh();
+        $manager = $this->getManager();
+
+        /** @var AccountTransformer $transformer */
+        $transformer = app(AccountTransformer::class);
+        $transformer->setParameters($this->parameters);
+        $resource = new Item($account, $transformer, self::RESOURCE_KEY);
+
+        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', self::CONTENT_TYPE);
+    }
+
+}

app/Api/V1/Controllers/Models/Account/StoreController.php

@@ -0,0 +1,86 @@
+<?php
+/**
+ * AccountController.php
+ * Copyright (c) 2019 james@firefly-iii.org
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Api\V1\Controllers\Models\Account;
+
+use FireflyIII\Api\V1\Controllers\Controller;
+use FireflyIII\Api\V1\Requests\Models\Account\StoreRequest;
+use FireflyIII\Repositories\Account\AccountRepositoryInterface;
+use FireflyIII\Transformers\AccountTransformer;
+use Illuminate\Http\JsonResponse;
+use League\Fractal\Resource\Item;
+
+/**
+ * Class StoreController
+ */
+class StoreController extends Controller
+{
+    public const RESOURCE_KEY = 'accounts';
+
+    private AccountRepositoryInterface $repository;
+
+    /**
+     * AccountController constructor.
+     *
+     * @codeCoverageIgnore
+     */
+    public function __construct()
+    {
+        parent::__construct();
+        $this->middleware(
+            function ($request, $next) {
+                $this->repository = app(AccountRepositoryInterface::class);
+                $this->repository->setUser(auth()->user());
+
+                return $next($request);
+            }
+        );
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/accounts/storeAccount
+     *
+     * Store a new instance.
+     *
+     * @param StoreRequest $request
+     *
+     * @return JsonResponse
+     */
+    public function store(StoreRequest $request): JsonResponse
+    {
+        $data = $request->getAllAccountData();
+        $this->repository->resetAccountOrder();
+        $account = $this->repository->store($data);
+        $manager = $this->getManager();
+
+        /** @var AccountTransformer $transformer */
+        $transformer = app(AccountTransformer::class);
+        $transformer->setParameters($this->parameters);
+
+        $resource = new Item($account, $transformer, self::RESOURCE_KEY);
+
+        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', self::CONTENT_TYPE);
+    }
+
+}

app/Api/V1/Controllers/Models/Account/UpdateController.php

@@ -0,0 +1,91 @@
+<?php
+/**
+ * AccountController.php
+ * Copyright (c) 2019 james@firefly-iii.org
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Api\V1\Controllers\Models\Account;
+
+use FireflyIII\Api\V1\Controllers\Controller;
+use FireflyIII\Api\V1\Requests\Models\Account\UpdateRequest;
+use FireflyIII\Models\Account;
+use FireflyIII\Repositories\Account\AccountRepositoryInterface;
+use FireflyIII\Transformers\AccountTransformer;
+use Illuminate\Http\JsonResponse;
+use League\Fractal\Resource\Item;
+use Log;
+use Preferences;
+
+/**
+ * Class UpdateController
+ */
+class UpdateController extends Controller
+{
+    public const RESOURCE_KEY = 'accounts';
+
+    private AccountRepositoryInterface $repository;
+
+    /**
+     * AccountController constructor.
+     *
+     * @codeCoverageIgnore
+     */
+    public function __construct()
+    {
+        parent::__construct();
+        $this->middleware(
+            function ($request, $next) {
+                $this->repository = app(AccountRepositoryInterface::class);
+                $this->repository->setUser(auth()->user());
+
+                return $next($request);
+            }
+        );
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/accounts/updateAccount
+     *
+     * Update account.
+     *
+     * @param UpdateRequest $request
+     * @param Account       $account
+     *
+     * @return JsonResponse
+     */
+    public function update(UpdateRequest $request, Account $account): JsonResponse
+    {
+        Log::debug(sprintf('Now in %s', __METHOD__));
+        $data         = $request->getUpdateData();
+        $data['type'] = config('firefly.shortNamesByFullName.' . $account->accountType->type);
+        $account      = $this->repository->update($account, $data);
+        $manager      = $this->getManager();
+        $account->refresh();
+        Preferences::mark();
+
+        /** @var AccountTransformer $transformer */
+        $transformer = app(AccountTransformer::class);
+        $transformer->setParameters($this->parameters);
+        $resource = new Item($account, $transformer, self::RESOURCE_KEY);
+
+        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', self::CONTENT_TYPE);
+    }
+}

app/Api/V1/Controllers/Models/Attachment/DestroyController.php

@@ -0,0 +1,79 @@
+<?php
+/*
+ * DestroyController.php
+ * Copyright (c) 2021 james@firefly-iii.org
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Api\V1\Controllers\Models\Attachment;
+
+use FireflyIII\Api\V1\Controllers\Controller;
+use FireflyIII\Api\V1\Middleware\ApiDemoUser;
+use FireflyIII\Models\Attachment;
+use FireflyIII\Repositories\Attachment\AttachmentRepositoryInterface;
+use FireflyIII\User;
+use Illuminate\Http\JsonResponse;
+
+/**
+ * Class DestroyController
+ */
+class DestroyController extends Controller
+{
+    private AttachmentRepositoryInterface $repository;
+
+    /**
+     * DestroyController constructor.
+     *
+     * @codeCoverageIgnore
+     */
+    public function __construct()
+    {
+        parent::__construct();
+        $this->middleware(ApiDemoUser::class)->except(['delete', 'download', 'show', 'index']);
+        $this->middleware(
+            function ($request, $next) {
+                /** @var User $user */
+                $user             = auth()->user();
+                $this->repository = app(AttachmentRepositoryInterface::class);
+                $this->repository->setUser($user);
+
+                return $next($request);
+            }
+        );
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/attachments/deleteAttachment
+     *
+     * Remove the specified resource from storage.
+     *
+     * @codeCoverageIgnore
+     *
+     * @param Attachment $attachment
+     *
+     * @return JsonResponse
+     */
+    public function destroy(Attachment $attachment): JsonResponse
+    {
+        $this->repository->destroy($attachment);
+
+        return response()->json([], 204);
+    }
+}

app/Api/V1/Controllers/Models/Attachment/ShowController.php

@@ -1,7 +1,7 @@
 <?php
-/**
- * AttachmentController.php
- * Copyright (c) 2019 james@firefly-iii.org
+/*
+ * ShowController.php
+ * Copyright (c) 2021 james@firefly-iii.org
  *
  * This file is part of Firefly III (https://github.com/firefly-iii).
  *
@@ -21,38 +21,31 @@
 
 declare(strict_types=1);
 
-namespace FireflyIII\Api\V1\Controllers;
+namespace FireflyIII\Api\V1\Controllers\Models\Attachment;
 
+use FireflyIII\Api\V1\Controllers\Controller;
 use FireflyIII\Api\V1\Middleware\ApiDemoUser;
-use FireflyIII\Api\V1\Requests\AttachmentStoreRequest;
-use FireflyIII\Api\V1\Requests\AttachmentUpdateRequest;
 use FireflyIII\Exceptions\FireflyException;
-use FireflyIII\Helpers\Attachments\AttachmentHelperInterface;
 use FireflyIII\Models\Attachment;
 use FireflyIII\Repositories\Attachment\AttachmentRepositoryInterface;
 use FireflyIII\Transformers\AttachmentTransformer;
 use FireflyIII\User;
 use Illuminate\Http\JsonResponse;
-use Illuminate\Http\Request;
 use Illuminate\Http\Response as LaravelResponse;
 use Illuminate\Pagination\LengthAwarePaginator;
 use League\Fractal\Pagination\IlluminatePaginatorAdapter;
 use League\Fractal\Resource\Collection as FractalCollection;
 use League\Fractal\Resource\Item;
-use Log;
-use function strlen;
 
 /**
- * Class AttachmentController.
+ * Class ShowController
  */
-class AttachmentController extends Controller
+class ShowController extends Controller
 {
-    /** @var AttachmentRepositoryInterface The attachment repository */
-    private $repository;
-
+    private AttachmentRepositoryInterface $repository;
 
     /**
-     * AccountController constructor.
+     * ShowController constructor.
      *
      * @codeCoverageIgnore
      */
@@ -67,36 +60,22 @@ class AttachmentController extends Controller
                 $this->repository = app(AttachmentRepositoryInterface::class);
                 $this->repository->setUser($user);
 
-
                 return $next($request);
             }
         );
     }
 
     /**
-     * Remove the specified resource from storage.
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/attachments/downloadAttachment
      *
-     * @codeCoverageIgnore
-     *
-     * @param Attachment $attachment
-     *
-     * @return JsonResponse
-     */
-    public function delete(Attachment $attachment): JsonResponse
-    {
-        $this->repository->destroy($attachment);
-
-        return response()->json([], 204);
-    }
-
-    /**
      * Download an attachment.
      *
      * @param Attachment $attachment
      *
      * @codeCoverageIgnore
-     * @throws   FireflyException
      * @return LaravelResponse
+     * @throws   FireflyException
      */
     public function download(Attachment $attachment): LaravelResponse
     {
@@ -124,7 +103,7 @@ class AttachmentController extends Controller
                 ->header('Expires', '0')
                 ->header('Cache-Control', 'must-revalidate, post-check=0, pre-check=0')
                 ->header('Pragma', 'public')
-                ->header('Content-Length', strlen($content));
+                ->header('Content-Length', (string) strlen($content));
 
             return $response;
         }
@@ -132,9 +111,13 @@ class AttachmentController extends Controller
     }
 
     /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/attachments/listAttachment
+     *
      * Display a listing of the resource.
      *
      * @return JsonResponse
+     * @throws FireflyException
      * @codeCoverageIgnore
      */
     public function index(): JsonResponse
@@ -144,7 +127,7 @@ class AttachmentController extends Controller
         // types to get, page size:
         $pageSize = (int) app('preferences')->getForUser(auth()->user(), 'listPageSize', 50)->data;
 
-        // get list of accounts. Count it and split it.
+        // get list of attachments. Count it and split it.
         $collection  = $this->repository->get();
         $count       = $collection->count();
         $attachments = $collection->slice(($this->parameters->get('page') - 1) * $pageSize, $pageSize);
@@ -160,10 +143,13 @@ class AttachmentController extends Controller
         $resource = new FractalCollection($attachments, $transformer, 'attachments');
         $resource->setPaginator(new IlluminatePaginatorAdapter($paginator));
 
-        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', 'application/vnd.api+json');
+        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', self::CONTENT_TYPE);
     }
 
     /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/attachments/getAttachment
+     *
      * Display the specified resource.
      *
      * @param Attachment $attachment
@@ -179,78 +165,6 @@ class AttachmentController extends Controller
 
         $resource = new Item($attachment, $transformer, 'attachments');
 
-        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', 'application/vnd.api+json');
+        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', self::CONTENT_TYPE);
     }
-
-    /**
-     * Store a newly created resource in storage.
-     *
-     * @param AttachmentStoreRequest $request
-     *
-     * @throws FireflyException
-     * @return JsonResponse
-     */
-    public function store(AttachmentStoreRequest $request): JsonResponse
-    {
-        $data       = $request->getAll();
-        $attachment = $this->repository->store($data);
-        $manager    = $this->getManager();
-
-        /** @var AttachmentTransformer $transformer */
-        $transformer = app(AttachmentTransformer::class);
-        $transformer->setParameters($this->parameters);
-
-        $resource = new Item($attachment, $transformer, 'attachments');
-
-        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', 'application/vnd.api+json');
-    }
-
-    /**
-     * Update the specified resource in storage.
-     *
-     * @param AttachmentUpdateRequest $request
-     * @param Attachment              $attachment
-     *
-     * @return JsonResponse
-     */
-    public function update(AttachmentUpdateRequest $request, Attachment $attachment): JsonResponse
-    {
-        $data = $request->getAll();
-        $this->repository->update($attachment, $data);
-        $manager = $this->getManager();
-
-        /** @var AttachmentTransformer $transformer */
-        $transformer = app(AttachmentTransformer::class);
-        $transformer->setParameters($this->parameters);
-
-        $resource = new Item($attachment, $transformer, 'attachments');
-
-        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', 'application/vnd.api+json');
-    }
-
-    /**
-     * Upload an attachment.
-     *
-     * @codeCoverageIgnore
-     *
-     * @param Request    $request
-     * @param Attachment $attachment
-     *
-     * @return JsonResponse
-     */
-    public function upload(Request $request, Attachment $attachment): JsonResponse
-    {
-        /** @var AttachmentHelperInterface $helper */
-        $helper = app(AttachmentHelperInterface::class);
-        $body   = $request->getContent();
-        if ('' === $body) {
-            Log::error('Body of attachment is empty.');
-
-            return response()->json([], 422);
-        }
-        $helper->saveAttachmentFromApi($attachment, $body);
-
-        return response()->json([], 204);
-    }
-
 }

app/Api/V1/Controllers/Models/Attachment/StoreController.php

@@ -0,0 +1,119 @@
+<?php
+/*
+ * StoreController.php
+ * Copyright (c) 2021 james@firefly-iii.org
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Api\V1\Controllers\Models\Attachment;
+
+use FireflyIII\Api\V1\Controllers\Controller;
+use FireflyIII\Api\V1\Middleware\ApiDemoUser;
+use FireflyIII\Api\V1\Requests\Models\Attachment\StoreRequest;
+use FireflyIII\Exceptions\FireflyException;
+use FireflyIII\Helpers\Attachments\AttachmentHelperInterface;
+use FireflyIII\Models\Attachment;
+use FireflyIII\Repositories\Attachment\AttachmentRepositoryInterface;
+use FireflyIII\Transformers\AttachmentTransformer;
+use FireflyIII\User;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Http\Request;
+use League\Fractal\Resource\Item;
+use Log;
+
+/**
+ * Class StoreController
+ */
+class StoreController extends Controller
+{
+    private AttachmentRepositoryInterface $repository;
+
+    /**
+     * StoreController constructor.
+     *
+     * @codeCoverageIgnore
+     */
+    public function __construct()
+    {
+        parent::__construct();
+        $this->middleware(ApiDemoUser::class)->except(['delete', 'download', 'show', 'index']);
+        $this->middleware(
+            function ($request, $next) {
+                /** @var User $user */
+                $user             = auth()->user();
+                $this->repository = app(AttachmentRepositoryInterface::class);
+                $this->repository->setUser($user);
+
+                return $next($request);
+            }
+        );
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/attachments/uploadAttachment
+     *
+     * Store a newly created resource in storage.
+     *
+     * @param StoreRequest $request
+     *
+     * @return JsonResponse
+     * @throws FireflyException
+     */
+    public function store(StoreRequest $request): JsonResponse
+    {
+        Log::debug(sprintf('Now in %s', __METHOD__));
+        $data       = $request->getAll();
+        $attachment = $this->repository->store($data);
+        $manager    = $this->getManager();
+
+        /** @var AttachmentTransformer $transformer */
+        $transformer = app(AttachmentTransformer::class);
+        $transformer->setParameters($this->parameters);
+
+        $resource = new Item($attachment, $transformer, 'attachments');
+
+        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', self::CONTENT_TYPE);
+    }
+
+    /**
+     * Upload an attachment.
+     *
+     * @codeCoverageIgnore
+     *
+     * @param Request    $request
+     * @param Attachment $attachment
+     *
+     * @return JsonResponse
+     */
+    public function upload(Request $request, Attachment $attachment): JsonResponse
+    {
+        /** @var AttachmentHelperInterface $helper */
+        $helper = app(AttachmentHelperInterface::class);
+        $body   = $request->getContent();
+        if ('' === $body) {
+            Log::error('Body of attachment is empty.');
+
+            return response()->json([], 422);
+        }
+        $helper->saveAttachmentFromApi($attachment, $body);
+
+        return response()->json([], 204);
+    }
+}

app/Api/V1/Controllers/Models/Attachment/UpdateController.php

@@ -0,0 +1,89 @@
+<?php
+/*
+ * UpdateController.php
+ * Copyright (c) 2021 james@firefly-iii.org
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Api\V1\Controllers\Models\Attachment;
+
+use FireflyIII\Api\V1\Controllers\Controller;
+use FireflyIII\Api\V1\Middleware\ApiDemoUser;
+use FireflyIII\Api\V1\Requests\Models\Attachment\UpdateRequest;
+use FireflyIII\Models\Attachment;
+use FireflyIII\Repositories\Attachment\AttachmentRepositoryInterface;
+use FireflyIII\Transformers\AttachmentTransformer;
+use FireflyIII\User;
+use Illuminate\Http\JsonResponse;
+use League\Fractal\Resource\Item;
+
+/**
+ * Class UpdateController
+ */
+class UpdateController extends Controller
+{
+    private AttachmentRepositoryInterface $repository;
+
+    /**
+     * UpdateController constructor.
+     *
+     * @codeCoverageIgnore
+     */
+    public function __construct()
+    {
+        parent::__construct();
+        $this->middleware(ApiDemoUser::class)->except(['delete', 'download', 'show', 'index']);
+        $this->middleware(
+            function ($request, $next) {
+                /** @var User $user */
+                $user             = auth()->user();
+                $this->repository = app(AttachmentRepositoryInterface::class);
+                $this->repository->setUser($user);
+
+                return $next($request);
+            }
+        );
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/attachments/updateAttachment
+     *
+     * Update the specified resource in storage.
+     *
+     * @param UpdateRequest $request
+     * @param Attachment    $attachment
+     *
+     * @return JsonResponse
+     */
+    public function update(UpdateRequest $request, Attachment $attachment): JsonResponse
+    {
+        $data = $request->getAll();
+        $this->repository->update($attachment, $data);
+        $manager = $this->getManager();
+
+        /** @var AttachmentTransformer $transformer */
+        $transformer = app(AttachmentTransformer::class);
+        $transformer->setParameters($this->parameters);
+
+        $resource = new Item($attachment, $transformer, 'attachments');
+
+        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', self::CONTENT_TYPE);
+    }
+}

app/Api/V1/Controllers/Models/AvailableBudget/DestroyController.php

@@ -0,0 +1,77 @@
+<?php
+/*
+ * DestroyController.php
+ * Copyright (c) 2021 james@firefly-iii.org
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Api\V1\Controllers\Models\AvailableBudget;
+
+use FireflyIII\Api\V1\Controllers\Controller;
+use FireflyIII\Models\AvailableBudget;
+use FireflyIII\Repositories\Budget\AvailableBudgetRepositoryInterface;
+use FireflyIII\User;
+use Illuminate\Http\JsonResponse;
+
+/**
+ * Class DestroyController
+ */
+class DestroyController extends Controller
+{
+    private AvailableBudgetRepositoryInterface $abRepository;
+
+    /**
+     * AvailableBudgetController constructor.
+     *
+     * @codeCoverageIgnore
+     */
+    public function __construct()
+    {
+        parent::__construct();
+        $this->middleware(
+            function ($request, $next) {
+                /** @var User $user */
+                $user               = auth()->user();
+                $this->abRepository = app(AvailableBudgetRepositoryInterface::class);
+                $this->abRepository->setUser($user);
+
+                return $next($request);
+            }
+        );
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/available_budgets/listAvailableBudget
+     *
+     * Remove the specified resource from storage.
+     *
+     * @param AvailableBudget $availableBudget
+     *
+     * @codeCoverageIgnore
+     *
+     * @return JsonResponse
+     */
+    public function destroy(AvailableBudget $availableBudget): JsonResponse
+    {
+        $this->abRepository->destroyAvailableBudget($availableBudget);
+
+        return response()->json([], 204);
+    }
+}

app/Api/V1/Controllers/Models/AvailableBudget/ShowController.php

@@ -1,7 +1,7 @@
 <?php
-/**
- * AvailableBudgetController.php
- * Copyright (c) 2019 james@firefly-iii.org
+/*
+ * ShowController.php
+ * Copyright (c) 2021 james@firefly-iii.org
  *
  * This file is part of Firefly III (https://github.com/firefly-iii).
  *
@@ -21,12 +21,11 @@
 
 declare(strict_types=1);
 
-namespace FireflyIII\Api\V1\Controllers;
+namespace FireflyIII\Api\V1\Controllers\Models\AvailableBudget;
 
-use FireflyIII\Api\V1\Requests\AvailableBudgetRequest;
-use FireflyIII\Factory\TransactionCurrencyFactory;
+use FireflyIII\Api\V1\Controllers\Controller;
+use FireflyIII\Exceptions\FireflyException;
 use FireflyIII\Models\AvailableBudget;
-use FireflyIII\Models\TransactionCurrency;
 use FireflyIII\Repositories\Budget\AvailableBudgetRepositoryInterface;
 use FireflyIII\Transformers\AvailableBudgetTransformer;
 use FireflyIII\User;
@@ -37,9 +36,9 @@ use League\Fractal\Resource\Collection as FractalCollection;
 use League\Fractal\Resource\Item;
 
 /**
- * Class AvailableBudgetController.
+ * Class ShowController
  */
-class AvailableBudgetController extends Controller
+class ShowController extends Controller
 {
     private AvailableBudgetRepositoryInterface $abRepository;
 
@@ -64,25 +63,13 @@ class AvailableBudgetController extends Controller
     }
 
     /**
-     * Remove the specified resource from storage.
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/available_budgets/getAvailableBudget
      *
-     * @param AvailableBudget $availableBudget
-     *
-     * @codeCoverageIgnore
-     *
-     * @return JsonResponse
-     */
-    public function delete(AvailableBudget $availableBudget): JsonResponse
-    {
-        $this->abRepository->destroyAvailableBudget($availableBudget);
-
-        return response()->json([], 204);
-    }
-
-    /**
      * Display a listing of the resource.
      *
      * @return JsonResponse
+     * @throws FireflyException
      * @codeCoverageIgnore
      */
     public function index(): JsonResponse
@@ -111,10 +98,13 @@ class AvailableBudgetController extends Controller
         $resource = new FractalCollection($availableBudgets, $transformer, 'available_budgets');
         $resource->setPaginator(new IlluminatePaginatorAdapter($paginator));
 
-        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', 'application/vnd.api+json');
+        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', self::CONTENT_TYPE);
     }
 
     /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/available_budgets/getAvailableBudget
+     *
      * Display the specified resource.
      *
      * @param AvailableBudget $availableBudget
@@ -132,80 +122,7 @@ class AvailableBudgetController extends Controller
 
         $resource = new Item($availableBudget, $transformer, 'available_budgets');
 
-        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', 'application/vnd.api+json');
+        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', self::CONTENT_TYPE);
     }
 
-    /**
-     * Store a newly created resource in storage.
-     *
-     * @param AvailableBudgetRequest $request
-     *
-     * @return JsonResponse
-     */
-    public function store(AvailableBudgetRequest $request): JsonResponse
-    {
-        $data = $request->getAll();
-        $data['start']->startOfDay();
-        $data['end']->endOfDay();
-
-        /** @var TransactionCurrencyFactory $factory */
-        $factory  = app(TransactionCurrencyFactory::class);
-        $currency = $factory->find($data['currency_id'], $data['currency_code']);
-
-        if (null === $currency) {
-            $currency = app('amount')->getDefaultCurrency();
-        }
-        $data['currency'] = $currency;
-        $availableBudget  = $this->abRepository->store($data);
-        $manager          = $this->getManager();
-
-        /** @var AvailableBudgetTransformer $transformer */
-        $transformer = app(AvailableBudgetTransformer::class);
-        $transformer->setParameters($this->parameters);
-
-        $resource = new Item($availableBudget, $transformer, 'available_budgets');
-
-        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', 'application/vnd.api+json');
-    }
-
-
-    /**
-     * Update the specified resource in storage.
-     *
-     * @param AvailableBudgetRequest $request
-     * @param AvailableBudget        $availableBudget
-     *
-     * @return JsonResponse
-     */
-    public function update(AvailableBudgetRequest $request, AvailableBudget $availableBudget): JsonResponse
-    {
-        $data = $request->getAll();
-
-        /** @var TransactionCurrencyFactory $factory */
-        $factory = app(TransactionCurrencyFactory::class);
-        /** @var TransactionCurrency $currency */
-        $currency = $factory->find($data['currency_id'] ?? null, $data['currency_code'] ?? null);
-
-        if (null === $currency) {
-            // use default currency:
-            $currency = app('amount')->getDefaultCurrency();
-        }
-        $currency->enabled = true;
-        $currency->save();
-        unset($data['currency_code']);
-        $data['currency_id'] = $currency->id;
-
-
-        $this->abRepository->updateAvailableBudget($availableBudget, $data);
-        $manager = $this->getManager();
-
-        /** @var AvailableBudgetTransformer $transformer */
-        $transformer = app(AvailableBudgetTransformer::class);
-        $transformer->setParameters($this->parameters);
-
-        $resource = new Item($availableBudget, $transformer, 'available_budgets');
-
-        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', 'application/vnd.api+json');
-
-    }
 }

app/Api/V1/Controllers/Models/AvailableBudget/StoreController.php

@@ -0,0 +1,105 @@
+<?php
+/*
+ * StoreController.php
+ * Copyright (c) 2021 james@firefly-iii.org
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Api\V1\Controllers\Models\AvailableBudget;
+
+use FireflyIII\Api\V1\Controllers\Controller;
+use FireflyIII\Api\V1\Requests\Models\AvailableBudget\Request;
+use FireflyIII\Exceptions\FireflyException;
+use FireflyIII\Factory\TransactionCurrencyFactory;
+use FireflyIII\Repositories\Budget\AvailableBudgetRepositoryInterface;
+use FireflyIII\Transformers\AvailableBudgetTransformer;
+use FireflyIII\User;
+use Illuminate\Http\JsonResponse;
+use JsonException;
+use League\Fractal\Resource\Item;
+
+/**
+ * Class StoreController
+ */
+class StoreController extends Controller
+{
+    private AvailableBudgetRepositoryInterface $abRepository;
+
+    /**
+     * AvailableBudgetController constructor.
+     *
+     * @codeCoverageIgnore
+     */
+    public function __construct()
+    {
+        parent::__construct();
+        $this->middleware(
+            function ($request, $next) {
+                /** @var User $user */
+                $user               = auth()->user();
+                $this->abRepository = app(AvailableBudgetRepositoryInterface::class);
+                $this->abRepository->setUser($user);
+
+                return $next($request);
+            }
+        );
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/available_budgets/storeAvailableBudget
+     *
+     * Store a newly created resource in storage.
+     *
+     * @param Request $request
+     *
+     * @return JsonResponse
+     * @throws FireflyException
+     * @throws JsonException
+     */
+    public function store(Request $request): JsonResponse
+    {
+        $data = $request->getAll();
+        $data['start']->startOfDay();
+        $data['end']->endOfDay();
+
+        // currency is not mandatory:
+        if (array_key_exists('currency_id', $data) || array_key_exists('currency_code', $data)) {
+            $factory             = app(TransactionCurrencyFactory::class);
+            $currency            = $factory->find($data['currency_id'] ?? null, $data['currency_code'] ?? null);
+            $data['currency_id'] = $currency->id;
+            unset($data['currency_code']);
+        }
+        if (!array_key_exists('currency_id', $data)) {
+            $currency            = app('amount')->getDefaultCurrencyByUser(auth()->user());
+            $data['currency_id'] = $currency->id;
+        }
+
+        $availableBudget = $this->abRepository->store($data);
+        $manager         = $this->getManager();
+
+        /** @var AvailableBudgetTransformer $transformer */
+        $transformer = app(AvailableBudgetTransformer::class);
+        $transformer->setParameters($this->parameters);
+
+        $resource = new Item($availableBudget, $transformer, 'available_budgets');
+
+        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', self::CONTENT_TYPE);
+    }
+}

app/Api/V1/Controllers/Models/AvailableBudget/UpdateController.php

@@ -0,0 +1,100 @@
+<?php
+/*
+ * UpdateController.php
+ * Copyright (c) 2021 james@firefly-iii.org
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Api\V1\Controllers\Models\AvailableBudget;
+
+use FireflyIII\Api\V1\Controllers\Controller;
+use FireflyIII\Api\V1\Requests\Models\AvailableBudget\Request;
+use FireflyIII\Factory\TransactionCurrencyFactory;
+use FireflyIII\Models\AvailableBudget;
+use FireflyIII\Repositories\Budget\AvailableBudgetRepositoryInterface;
+use FireflyIII\Transformers\AvailableBudgetTransformer;
+use FireflyIII\User;
+use Illuminate\Http\JsonResponse;
+use League\Fractal\Resource\Item;
+
+/**
+ * Class UpdateController
+ */
+class UpdateController extends Controller
+{
+    private AvailableBudgetRepositoryInterface $abRepository;
+
+    /**
+     * AvailableBudgetController constructor.
+     *
+     * @codeCoverageIgnore
+     */
+    public function __construct()
+    {
+        parent::__construct();
+        $this->middleware(
+            function ($request, $next) {
+                /** @var User $user */
+                $user               = auth()->user();
+                $this->abRepository = app(AvailableBudgetRepositoryInterface::class);
+                $this->abRepository->setUser($user);
+
+                return $next($request);
+            }
+        );
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/available_budgets/updateAvailableBudget
+     *
+     * Update the specified resource in storage.
+     *
+     * @param Request         $request
+     * @param AvailableBudget $availableBudget
+     *
+     * @return JsonResponse
+     */
+    public function update(Request $request, AvailableBudget $availableBudget): JsonResponse
+    {
+        $data = $request->getAll();
+
+        // find and validate currency ID
+        if (array_key_exists('currency_id', $data) || array_key_exists('currency_code', $data)) {
+            $factory           = app(TransactionCurrencyFactory::class);
+            $currency          = $factory->find($data['currency_id'] ?? null, $data['currency_code'] ?? null) ?? app('amount')->getDefaultCurrency();
+            $currency->enabled = true;
+            $currency->save();
+            unset($data['currency_code']);
+            $data['currency_id'] = $currency->id;
+        }
+
+        $this->abRepository->updateAvailableBudget($availableBudget, $data);
+        $manager = $this->getManager();
+
+        /** @var AvailableBudgetTransformer $transformer */
+        $transformer = app(AvailableBudgetTransformer::class);
+        $transformer->setParameters($this->parameters);
+
+        $resource = new Item($availableBudget, $transformer, 'available_budgets');
+
+        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', self::CONTENT_TYPE);
+
+    }
+}

app/Api/V1/Controllers/Models/Bill/DestroyController.php

@@ -0,0 +1,74 @@
+<?php
+/*
+ * DestroyController.php
+ * Copyright (c) 2021 james@firefly-iii.org
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Api\V1\Controllers\Models\Bill;
+
+use FireflyIII\Api\V1\Controllers\Controller;
+use FireflyIII\Models\Bill;
+use FireflyIII\Repositories\Bill\BillRepositoryInterface;
+use Illuminate\Http\JsonResponse;
+
+/**
+ * Class DestroyController
+ */
+class DestroyController extends Controller
+{
+    private BillRepositoryInterface $repository;
+
+    /**
+     * BillController constructor.
+     *
+     * @codeCoverageIgnore
+     */
+    public function __construct()
+    {
+        parent::__construct();
+        $this->middleware(
+            function ($request, $next) {
+                $this->repository = app(BillRepositoryInterface::class);
+                $this->repository->setUser(auth()->user());
+
+                return $next($request);
+            }
+        );
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/bills/deleteBill
+     *
+     * Remove the specified resource from storage.
+     *
+     * @param Bill $bill
+     *
+     * @return JsonResponse
+     * @codeCoverageIgnore
+     */
+    public function destroy(Bill $bill): JsonResponse
+    {
+        $this->repository->destroy($bill);
+
+        return response()->json([], 204);
+    }
+
+}

app/Api/V1/Controllers/Models/Bill/ListController.php

@@ -1,8 +1,7 @@
 <?php
-
-/**
- * BillController.php
- * Copyright (c) 2019 james@firefly-iii.org
+/*
+ * ListController.php
+ * Copyright (c) 2021 james@firefly-iii.org
  *
  * This file is part of Firefly III (https://github.com/firefly-iii).
  *
@@ -22,16 +21,15 @@
 
 declare(strict_types=1);
 
-namespace FireflyIII\Api\V1\Controllers;
+namespace FireflyIII\Api\V1\Controllers\Models\Bill;
 
-use FireflyIII\Api\V1\Requests\BillRequest;
+use FireflyIII\Api\V1\Controllers\Controller;
 use FireflyIII\Exceptions\FireflyException;
 use FireflyIII\Helpers\Collector\GroupCollectorInterface;
 use FireflyIII\Models\Bill;
 use FireflyIII\Repositories\Bill\BillRepositoryInterface;
 use FireflyIII\Support\Http\Api\TransactionFilter;
 use FireflyIII\Transformers\AttachmentTransformer;
-use FireflyIII\Transformers\BillTransformer;
 use FireflyIII\Transformers\RuleTransformer;
 use FireflyIII\Transformers\TransactionGroupTransformer;
 use FireflyIII\User;
@@ -40,18 +38,15 @@ use Illuminate\Http\Request;
 use Illuminate\Pagination\LengthAwarePaginator;
 use League\Fractal\Pagination\IlluminatePaginatorAdapter;
 use League\Fractal\Resource\Collection as FractalCollection;
-use League\Fractal\Resource\Item;
 
 /**
- * Class BillController.
+ * Class ListController
  */
-class BillController extends Controller
+class ListController extends Controller
 {
     use TransactionFilter;
 
-    /** @var BillRepositoryInterface The bill repository */
-    private $repository;
-
+    private BillRepositoryInterface $repository;
 
     /**
      * BillController constructor.
@@ -63,12 +58,8 @@ class BillController extends Controller
         parent::__construct();
         $this->middleware(
             function ($request, $next) {
-                /** @var User $admin */
-                $admin = auth()->user();
-
-                /** @var BillRepositoryInterface repository */
                 $this->repository = app(BillRepositoryInterface::class);
-                $this->repository->setUser($admin);
+                $this->repository->setUser(auth()->user());
 
                 return $next($request);
             }
@@ -76,11 +67,15 @@ class BillController extends Controller
     }
 
     /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/bills/listAttachmentByBill
+     *
      * Display a listing of the resource.
      *
      * @param Bill $bill
      *
      * @return JsonResponse
+     * @throws FireflyException
      * @codeCoverageIgnore
      */
     public function attachments(Bill $bill): JsonResponse
@@ -103,55 +98,19 @@ class BillController extends Controller
         $resource = new FractalCollection($attachments, $transformer, 'attachments');
         $resource->setPaginator(new IlluminatePaginatorAdapter($paginator));
 
-        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', 'application/vnd.api+json');
+        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', self::CONTENT_TYPE);
     }
 
     /**
-     * Remove the specified resource from storage.
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/bills/listRuleByBill
      *
-     * @param Bill $bill
-     *
-     * @return JsonResponse
-     * @codeCoverageIgnore
-     */
-    public function delete(Bill $bill): JsonResponse
-    {
-        $this->repository->destroy($bill);
-
-        return response()->json([], 204);
-    }
-
-    /**
-     * Display a listing of the resource.
-     *
-     * @return JsonResponse
-     * @codeCoverageIgnore
-     */
-    public function index(): JsonResponse
-    {
-        $bills     = $this->repository->getBills();
-        $manager   = $this->getManager();
-        $pageSize  = (int) app('preferences')->getForUser(auth()->user(), 'listPageSize', 50)->data;
-        $count     = $bills->count();
-        $bills     = $bills->slice(($this->parameters->get('page') - 1) * $pageSize, $pageSize);
-        $paginator = new LengthAwarePaginator($bills, $count, $pageSize, $this->parameters->get('page'));
-
-        /** @var BillTransformer $transformer */
-        $transformer = app(BillTransformer::class);
-        $transformer->setParameters($this->parameters);
-
-        $resource = new FractalCollection($bills, $transformer, 'bills');
-        $resource->setPaginator(new IlluminatePaginatorAdapter($paginator));
-
-        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', 'application/vnd.api+json');
-    }
-
-    /**
      * List all of them.
      *
      * @param Bill $bill
      *
      * @return JsonResponse
+     * @throws FireflyException
      * @codeCoverageIgnore
      */
     public function rules(Bill $bill): JsonResponse
@@ -173,58 +132,17 @@ class BillController extends Controller
         /** @var RuleTransformer $transformer */
         $transformer = app(RuleTransformer::class);
         $transformer->setParameters($this->parameters);
-
-
         $resource = new FractalCollection($rules, $transformer, 'rules');
         $resource->setPaginator(new IlluminatePaginatorAdapter($paginator));
 
-        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', 'application/vnd.api+json');
+        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', self::CONTENT_TYPE);
 
     }
 
     /**
-     * Show the specified bill.
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/bills/listTransactionByBill
      *
-     * @param Bill $bill
-     *
-     * @return JsonResponse
-     * @codeCoverageIgnore
-     */
-    public function show(Bill $bill): JsonResponse
-    {
-        $manager = $this->getManager();
-        /** @var BillTransformer $transformer */
-        $transformer = app(BillTransformer::class);
-        $transformer->setParameters($this->parameters);
-
-        $resource = new Item($bill, $transformer, 'bills');
-
-        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', 'application/vnd.api+json');
-    }
-
-    /**
-     * Store a bill.
-     *
-     * @param BillRequest $request
-     *
-     * @throws FireflyException
-     * @return JsonResponse
-     */
-    public function store(BillRequest $request): JsonResponse
-    {
-        $bill    = $this->repository->store($request->getAll());
-        $manager = $this->getManager();
-
-        /** @var BillTransformer $transformer */
-        $transformer = app(BillTransformer::class);
-        $transformer->setParameters($this->parameters);
-
-        $resource = new Item($bill, $transformer, 'bills');
-
-        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', 'application/vnd.api+json');
-    }
-
-    /**
      * Show all transactions.
      *
      * @param Request $request
@@ -232,6 +150,7 @@ class BillController extends Controller
      * @param Bill    $bill
      *
      * @return JsonResponse
+     * @throws FireflyException
      * @codeCoverageIgnore
      */
     public function transactions(Request $request, Bill $bill): JsonResponse
@@ -279,30 +198,7 @@ class BillController extends Controller
         $resource = new FractalCollection($transactions, $transformer, 'transactions');
         $resource->setPaginator(new IlluminatePaginatorAdapter($paginator));
 
-        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', 'application/vnd.api+json');
+        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', self::CONTENT_TYPE);
     }
 
-    /**
-     * Update a bill.
-     *
-     * @param BillRequest $request
-     * @param Bill        $bill
-     *
-     * @return JsonResponse
-     */
-    public function update(BillRequest $request, Bill $bill): JsonResponse
-    {
-        $data    = $request->getAll();
-        $bill    = $this->repository->update($bill, $data);
-        $manager = $this->getManager();
-
-        /** @var BillTransformer $transformer */
-        $transformer = app(BillTransformer::class);
-        $transformer->setParameters($this->parameters);
-
-        $resource = new Item($bill, $transformer, 'bills');
-
-        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', 'application/vnd.api+json');
-
-    }
 }

app/Api/V1/Controllers/Models/Bill/ShowController.php

@@ -0,0 +1,114 @@
+<?php
+/*
+ * ShowController.php
+ * Copyright (c) 2021 james@firefly-iii.org
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Api\V1\Controllers\Models\Bill;
+
+use FireflyIII\Api\V1\Controllers\Controller;
+use FireflyIII\Exceptions\FireflyException;
+use FireflyIII\Models\Bill;
+use FireflyIII\Repositories\Bill\BillRepositoryInterface;
+use FireflyIII\Transformers\BillTransformer;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Pagination\LengthAwarePaginator;
+use League\Fractal\Pagination\IlluminatePaginatorAdapter;
+use League\Fractal\Resource\Collection as FractalCollection;
+use League\Fractal\Resource\Item;
+
+/**
+ * Class ShowController
+ */
+class ShowController extends Controller
+{
+    private BillRepositoryInterface $repository;
+
+    /**
+     * BillController constructor.
+     *
+     * @codeCoverageIgnore
+     */
+    public function __construct()
+    {
+        parent::__construct();
+        $this->middleware(
+            function ($request, $next) {
+                $this->repository = app(BillRepositoryInterface::class);
+                $this->repository->setUser(auth()->user());
+
+                return $next($request);
+            }
+        );
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/bills/listBill
+     *
+     * Display a listing of the resource.
+     *
+     * @return JsonResponse
+     * @throws FireflyException
+     * @codeCoverageIgnore
+     */
+    public function index(): JsonResponse
+    {
+        $this->repository->correctOrder();
+        $bills     = $this->repository->getBills();
+        $manager   = $this->getManager();
+        $pageSize  = (int) app('preferences')->getForUser(auth()->user(), 'listPageSize', 50)->data;
+        $count     = $bills->count();
+        $bills     = $bills->slice(($this->parameters->get('page') - 1) * $pageSize, $pageSize);
+        $paginator = new LengthAwarePaginator($bills, $count, $pageSize, $this->parameters->get('page'));
+
+        /** @var BillTransformer $transformer */
+        $transformer = app(BillTransformer::class);
+        $transformer->setParameters($this->parameters);
+
+        $resource = new FractalCollection($bills, $transformer, 'bills');
+        $resource->setPaginator(new IlluminatePaginatorAdapter($paginator));
+
+        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', self::CONTENT_TYPE);
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/bills/getBill
+     *
+     * Show the specified bill.
+     *
+     * @param Bill $bill
+     *
+     * @return JsonResponse
+     * @codeCoverageIgnore
+     */
+    public function show(Bill $bill): JsonResponse
+    {
+        $manager = $this->getManager();
+        /** @var BillTransformer $transformer */
+        $transformer = app(BillTransformer::class);
+        $transformer->setParameters($this->parameters);
+
+        $resource = new Item($bill, $transformer, 'bills');
+
+        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', self::CONTENT_TYPE);
+    }
+}

app/Api/V1/Controllers/Models/Bill/StoreController.php

@@ -0,0 +1,87 @@
+<?php
+/*
+ * StoreController.php
+ * Copyright (c) 2021 james@firefly-iii.org
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Api\V1\Controllers\Models\Bill;
+
+use FireflyIII\Api\V1\Controllers\Controller;
+use FireflyIII\Api\V1\Requests\Models\Bill\StoreRequest;
+use FireflyIII\Exceptions\FireflyException;
+use FireflyIII\Repositories\Bill\BillRepositoryInterface;
+use FireflyIII\Support\Http\Api\TransactionFilter;
+use FireflyIII\Transformers\BillTransformer;
+use Illuminate\Http\JsonResponse;
+use League\Fractal\Resource\Item;
+
+/**
+ * Class StoreController
+ */
+class StoreController extends Controller
+{
+    use TransactionFilter;
+
+    private BillRepositoryInterface $repository;
+
+    /**
+     * BillController constructor.
+     *
+     * @codeCoverageIgnore
+     */
+    public function __construct()
+    {
+        parent::__construct();
+        $this->middleware(
+            function ($request, $next) {
+                $this->repository = app(BillRepositoryInterface::class);
+                $this->repository->setUser(auth()->user());
+
+                return $next($request);
+            }
+        );
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/bills/storeBill
+     *
+     * Store a bill.
+     *
+     * @param StoreRequest $request
+     *
+     * @return JsonResponse
+     * @throws FireflyException
+     */
+    public function store(StoreRequest $request): JsonResponse
+    {
+        $data    = $request->getAll();
+        $bill    = $this->repository->store($data);
+        $manager = $this->getManager();
+
+        /** @var BillTransformer $transformer */
+        $transformer = app(BillTransformer::class);
+        $transformer->setParameters($this->parameters);
+
+        $resource = new Item($bill, $transformer, 'bills');
+
+        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', self::CONTENT_TYPE);
+    }
+}

app/Api/V1/Controllers/Models/Bill/UpdateController.php

@@ -0,0 +1,86 @@
+<?php
+/*
+ * UpdateController.php
+ * Copyright (c) 2021 james@firefly-iii.org
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Api\V1\Controllers\Models\Bill;
+
+use FireflyIII\Api\V1\Controllers\Controller;
+use FireflyIII\Api\V1\Requests\Models\Bill\UpdateRequest;
+use FireflyIII\Models\Bill;
+use FireflyIII\Repositories\Bill\BillRepositoryInterface;
+use FireflyIII\Transformers\BillTransformer;
+use Illuminate\Http\JsonResponse;
+use League\Fractal\Resource\Item;
+
+/**
+ * Class UpdateController
+ */
+class UpdateController extends Controller
+{
+    private BillRepositoryInterface $repository;
+
+    /**
+     * BillController constructor.
+     *
+     * @codeCoverageIgnore
+     */
+    public function __construct()
+    {
+        parent::__construct();
+        $this->middleware(
+            function ($request, $next) {
+                $this->repository = app(BillRepositoryInterface::class);
+                $this->repository->setUser(auth()->user());
+
+                return $next($request);
+            }
+        );
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/bills/updateBill
+     *
+     * Update a bill.
+     *
+     * @param UpdateRequest $request
+     * @param Bill          $bill
+     *
+     * @return JsonResponse
+     */
+    public function update(UpdateRequest $request, Bill $bill): JsonResponse
+    {
+        $data    = $request->getAll();
+        $bill    = $this->repository->update($bill, $data);
+        $manager = $this->getManager();
+
+        /** @var BillTransformer $transformer */
+        $transformer = app(BillTransformer::class);
+        $transformer->setParameters($this->parameters);
+
+        $resource = new Item($bill, $transformer, 'bills');
+
+        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', self::CONTENT_TYPE);
+
+    }
+
+}

app/Api/V1/Controllers/Models/Budget/DestroyController.php

@@ -0,0 +1,73 @@
+<?php
+/*
+ * DestroyController.php
+ * Copyright (c) 2021 james@firefly-iii.org
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Api\V1\Controllers\Models\Budget;
+
+use FireflyIII\Api\V1\Controllers\Controller;
+use FireflyIII\Models\Budget;
+use FireflyIII\Repositories\Budget\BudgetRepositoryInterface;
+use Illuminate\Http\JsonResponse;
+
+/**
+ * Class DestroyController
+ */
+class DestroyController extends Controller
+{
+    private BudgetRepositoryInterface $repository;
+
+    /**
+     * DestroyController constructor.
+     *
+     * @codeCoverageIgnore
+     */
+    public function __construct()
+    {
+        parent::__construct();
+        $this->middleware(
+            function ($request, $next) {
+                $this->repository = app(BudgetRepositoryInterface::class);
+                $this->repository->setUser(auth()->user());
+
+                return $next($request);
+            }
+        );
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/budgets/deleteBudget
+     *
+     * Remove the specified resource from storage.
+     *
+     * @param Budget $budget
+     *
+     * @return JsonResponse
+     * @codeCoverageIgnore
+     */
+    public function destroy(Budget $budget): JsonResponse
+    {
+        $this->repository->destroy($budget);
+
+        return response()->json([], 204);
+    }
+}

app/Api/V1/Controllers/Models/Budget/ListController.php

@@ -1,7 +1,7 @@
 <?php
-/**
- * BudgetController.php
- * Copyright (c) 2019 james@firefly-iii.org
+/*
+ * ListController.php
+ * Copyright (c) 2021 james@firefly-iii.org
  *
  * This file is part of Firefly III (https://github.com/firefly-iii).
  *
@@ -21,12 +21,9 @@
 
 declare(strict_types=1);
 
-namespace FireflyIII\Api\V1\Controllers;
+namespace FireflyIII\Api\V1\Controllers\Models\Budget;
 
-use Exception;
-use FireflyIII\Api\V1\Requests\BudgetLimitRequest;
-use FireflyIII\Api\V1\Requests\BudgetStoreRequest;
-use FireflyIII\Api\V1\Requests\BudgetUpdateRequest;
+use FireflyIII\Api\V1\Controllers\Controller;
 use FireflyIII\Exceptions\FireflyException;
 use FireflyIII\Helpers\Collector\GroupCollectorInterface;
 use FireflyIII\Models\Budget;
@@ -35,7 +32,6 @@ use FireflyIII\Repositories\Budget\BudgetRepositoryInterface;
 use FireflyIII\Support\Http\Api\TransactionFilter;
 use FireflyIII\Transformers\AttachmentTransformer;
 use FireflyIII\Transformers\BudgetLimitTransformer;
-use FireflyIII\Transformers\BudgetTransformer;
 use FireflyIII\Transformers\TransactionGroupTransformer;
 use FireflyIII\User;
 use Illuminate\Http\JsonResponse;
@@ -43,24 +39,19 @@ use Illuminate\Http\Request;
 use Illuminate\Pagination\LengthAwarePaginator;
 use League\Fractal\Pagination\IlluminatePaginatorAdapter;
 use League\Fractal\Resource\Collection as FractalCollection;
-use League\Fractal\Resource\Item;
 
-/**
- * Class BudgetController.
+/***
+ * Class ListController
  */
-class BudgetController extends Controller
+class ListController extends Controller
 {
     use TransactionFilter;
 
-    /** @var BudgetLimitRepositoryInterface */
-    private $blRepository;
-
-    /** @var BudgetRepositoryInterface The budget repository */
-    private $repository;
-
+    private BudgetLimitRepositoryInterface $blRepository;
+    private BudgetRepositoryInterface      $repository;
 
     /**
-     * BudgetController constructor.
+     * ListController constructor.
      *
      * @codeCoverageIgnore
      */
@@ -69,13 +60,10 @@ class BudgetController extends Controller
         parent::__construct();
         $this->middleware(
             function ($request, $next) {
-                /** @var User $admin */
-                $admin = auth()->user();
-
                 $this->repository   = app(BudgetRepositoryInterface::class);
                 $this->blRepository = app(BudgetLimitRepositoryInterface::class);
-                $this->repository->setUser($admin);
-                $this->blRepository->setUser($admin);
+                $this->repository->setUser(auth()->user());
+                $this->blRepository->setUser(auth()->user());
 
                 return $next($request);
             }
@@ -83,39 +71,13 @@ class BudgetController extends Controller
     }
 
     /**
-     * Display a listing of the resource.
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/budgets/listAttachmentByBudget
      *
      * @param Budget $budget
      *
      * @return JsonResponse
-     * @codeCoverageIgnore
-     */
-    public function budgetLimits(Budget $budget): JsonResponse
-    {
-        $manager  = $this->getManager();
-        $pageSize = (int) app('preferences')->getForUser(auth()->user(), 'listPageSize', 50)->data;
-        $this->parameters->set('budget_id', $budget->id);
-        $collection   = $this->blRepository->getBudgetLimits($budget, $this->parameters->get('start'), $this->parameters->get('end'));
-        $count        = $collection->count();
-        $budgetLimits = $collection->slice(($this->parameters->get('page') - 1) * $pageSize, $pageSize);
-        $paginator    = new LengthAwarePaginator($budgetLimits, $count, $pageSize, $this->parameters->get('page'));
-        $paginator->setPath(route('api.v1.budgets.budget_limits', [$budget->id]) . $this->buildParams());
-
-        /** @var BudgetLimitTransformer $transformer */
-        $transformer = app(BudgetLimitTransformer::class);
-        $transformer->setParameters($this->parameters);
-
-
-        $resource = new FractalCollection($budgetLimits, $transformer, 'budget_limits');
-        $resource->setPaginator(new IlluminatePaginatorAdapter($paginator));
-
-        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', 'application/vnd.api+json');
-    }
-
-    /**
-     * @param Budget $budget
-     *
-     * @return JsonResponse
+     * @throws FireflyException
      * @codeCoverageIgnore
      */
     public function attachments(Budget $budget): JsonResponse
@@ -138,101 +100,45 @@ class BudgetController extends Controller
         $resource = new FractalCollection($attachments, $transformer, 'attachments');
         $resource->setPaginator(new IlluminatePaginatorAdapter($paginator));
 
-        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', 'application/vnd.api+json');
+        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', self::CONTENT_TYPE);
     }
 
     /**
-     * Remove the specified resource from storage.
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/budgets/listBudgetLimitByBudget
      *
-     * @param Budget $budget
-     *
-     * @return JsonResponse
-     * @codeCoverageIgnore
-     */
-    public function delete(Budget $budget): JsonResponse
-    {
-        $this->repository->destroy($budget);
-
-        return response()->json([], 204);
-    }
-
-    /**
      * Display a listing of the resource.
      *
-     * @return JsonResponse
-     * @codeCoverageIgnore
-     */
-    public function index(): JsonResponse
-    {
-        $manager = $this->getManager();
-
-        // types to get, page size:
-        $pageSize = (int) app('preferences')->getForUser(auth()->user(), 'listPageSize', 50)->data;
-
-        // get list of budgets. Count it and split it.
-        $collection = $this->repository->getBudgets();
-        $count      = $collection->count();
-        $budgets    = $collection->slice(($this->parameters->get('page') - 1) * $pageSize, $pageSize);
-
-        // make paginator:
-        $paginator = new LengthAwarePaginator($budgets, $count, $pageSize, $this->parameters->get('page'));
-        $paginator->setPath(route('api.v1.budgets.index') . $this->buildParams());
-
-        /** @var BudgetTransformer $transformer */
-        $transformer = app(BudgetTransformer::class);
-        $transformer->setParameters($this->parameters);
-
-        $resource = new FractalCollection($budgets, $transformer, 'budgets');
-        $resource->setPaginator(new IlluminatePaginatorAdapter($paginator));
-
-        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', 'application/vnd.api+json');
-    }
-
-    /**
-     * Show a budget.
-     *
      * @param Budget $budget
      *
      * @return JsonResponse
+     * @throws FireflyException
      * @codeCoverageIgnore
      */
-    public function show(Budget $budget): JsonResponse
+    public function budgetLimits(Budget $budget): JsonResponse
     {
-        $manager = $this->getManager();
+        $manager  = $this->getManager();
+        $pageSize = (int) app('preferences')->getForUser(auth()->user(), 'listPageSize', 50)->data;
+        $this->parameters->set('budget_id', $budget->id);
+        $collection   = $this->blRepository->getBudgetLimits($budget, $this->parameters->get('start'), $this->parameters->get('end'));
+        $count        = $collection->count();
+        $budgetLimits = $collection->slice(($this->parameters->get('page') - 1) * $pageSize, $pageSize);
+        $paginator    = new LengthAwarePaginator($budgetLimits, $count, $pageSize, $this->parameters->get('page'));
+        $paginator->setPath(route('api.v1.budgets.budget_limits', [$budget->id]) . $this->buildParams());
 
-        /** @var BudgetTransformer $transformer */
-        $transformer = app(BudgetTransformer::class);
+        /** @var BudgetLimitTransformer $transformer */
+        $transformer = app(BudgetLimitTransformer::class);
         $transformer->setParameters($this->parameters);
+        $resource = new FractalCollection($budgetLimits, $transformer, 'budget_limits');
+        $resource->setPaginator(new IlluminatePaginatorAdapter($paginator));
 
-        $resource = new Item($budget, $transformer, 'budgets');
-
-        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', 'application/vnd.api+json');
+        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', self::CONTENT_TYPE);
     }
 
     /**
-     * Store a budget.
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/budgets/listTransactionByBudget
      *
-     * @param BudgetStoreRequest $request
-     *
-     * @throws FireflyException
-     *
-     * @return JsonResponse
-     */
-    public function store(BudgetStoreRequest $request): JsonResponse
-    {
-        $budget  = $this->repository->store($request->getAll());
-        $manager = $this->getManager();
-
-        /** @var BudgetTransformer $transformer */
-        $transformer = app(BudgetTransformer::class);
-        $transformer->setParameters($this->parameters);
-
-        $resource = new Item($budget, $transformer, 'budgets');
-
-        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', 'application/vnd.api+json');
-    }
-
-    /**
      * Show all transactions.
      *
      * @param Request $request
@@ -240,6 +146,7 @@ class BudgetController extends Controller
      * @param Budget  $budget
      *
      * @return JsonResponse
+     * @throws FireflyException
      * @codeCoverageIgnore
      */
     public function transactions(Request $request, Budget $budget): JsonResponse
@@ -288,36 +195,74 @@ class BudgetController extends Controller
         /** @var TransactionGroupTransformer $transformer */
         $transformer = app(TransactionGroupTransformer::class);
         $transformer->setParameters($this->parameters);
-
-
         $resource = new FractalCollection($transactions, $transformer, 'transactions');
         $resource->setPaginator(new IlluminatePaginatorAdapter($paginator));
 
-        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', 'application/vnd.api+json');
+        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', self::CONTENT_TYPE);
     }
 
     /**
-     * Update a budget.
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/budgets/listTransactionWithoutBudget
      *
-     * @param BudgetUpdateRequest $request
-     * @param Budget              $budget
+     * Show all transactions.
+     *
+     * @param Request $request
      *
      * @return JsonResponse
+     * @throws FireflyException
+     * @codeCoverageIgnore
      */
-    public function update(BudgetUpdateRequest $request, Budget $budget): JsonResponse
+    public function withoutBudget(Request $request): JsonResponse
     {
-        $data    = $request->getAll();
-        $budget  = $this->repository->update($budget, $data);
+        $pageSize = (int) app('preferences')->getForUser(auth()->user(), 'listPageSize', 50)->data;
+
+        // user can overrule page size with limit parameter.
+        $limit = $this->parameters->get('limit');
+        if (null !== $limit && $limit > 0) {
+            $pageSize = $limit;
+        }
+
+        $type = $request->get('type') ?? 'default';
+        $this->parameters->set('type', $type);
+
+        $types   = $this->mapTransactionTypes($this->parameters->get('type'));
         $manager = $this->getManager();
 
-        /** @var BudgetTransformer $transformer */
-        $transformer = app(BudgetTransformer::class);
+        /** @var User $admin */
+        $admin = auth()->user();
+
+        // use new group collector:
+        /** @var GroupCollectorInterface $collector */
+        $collector = app(GroupCollectorInterface::class);
+        $collector
+            ->setUser($admin)
+            // filter on budget.
+            ->withoutBudget()
+            // all info needed for the API:
+            ->withAPIInformation()
+            // set page size:
+            ->setLimit($pageSize)
+            // set page to retrieve
+            ->setPage($this->parameters->get('page'))
+            // set types of transactions to return.
+            ->setTypes($types);
+
+        if (null !== $this->parameters->get('start') && null !== $this->parameters->get('end')) {
+            $collector->setRange($this->parameters->get('start'), $this->parameters->get('end'));
+        }
+
+        $paginator = $collector->getPaginatedGroups();
+        $paginator->setPath(route('api.v1.budgets.without-budget') . $this->buildParams());
+        $transactions = $paginator->getCollection();
+
+        /** @var TransactionGroupTransformer $transformer */
+        $transformer = app(TransactionGroupTransformer::class);
         $transformer->setParameters($this->parameters);
+        $resource = new FractalCollection($transactions, $transformer, 'transactions');
+        $resource->setPaginator(new IlluminatePaginatorAdapter($paginator));
 
-        $resource = new Item($budget, $transformer, 'budgets');
-
-        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', 'application/vnd.api+json');
-
+        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', self::CONTENT_TYPE);
     }
 
 }

app/Api/V1/Controllers/Models/Budget/ShowController.php

@@ -0,0 +1,123 @@
+<?php
+/*
+ * ShowController.php
+ * Copyright (c) 2021 james@firefly-iii.org
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Api\V1\Controllers\Models\Budget;
+
+use FireflyIII\Api\V1\Controllers\Controller;
+use FireflyIII\Exceptions\FireflyException;
+use FireflyIII\Models\Budget;
+use FireflyIII\Repositories\Budget\BudgetLimitRepositoryInterface;
+use FireflyIII\Repositories\Budget\BudgetRepositoryInterface;
+use FireflyIII\Transformers\BudgetTransformer;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Pagination\LengthAwarePaginator;
+use League\Fractal\Pagination\IlluminatePaginatorAdapter;
+use League\Fractal\Resource\Collection as FractalCollection;
+use League\Fractal\Resource\Item;
+
+/**
+ * Class ShowController
+ */
+class ShowController extends Controller
+{
+    private BudgetLimitRepositoryInterface $blRepository;
+    private BudgetRepositoryInterface      $repository;
+
+    /**
+     * ListController constructor.
+     *
+     * @codeCoverageIgnore
+     */
+    public function __construct()
+    {
+        parent::__construct();
+        $this->middleware(
+            function ($request, $next) {
+                $this->repository   = app(BudgetRepositoryInterface::class);
+                $this->blRepository = app(BudgetLimitRepositoryInterface::class);
+                $this->repository->setUser(auth()->user());
+                $this->blRepository->setUser(auth()->user());
+
+                return $next($request);
+            }
+        );
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/budgets/listBudget
+     *
+     * Display a listing of the resource.
+     *
+     * @return JsonResponse
+     * @throws FireflyException
+     * @codeCoverageIgnore
+     */
+    public function index(): JsonResponse
+    {
+        $manager = $this->getManager();
+
+        // types to get, page size:
+        $pageSize = (int) app('preferences')->getForUser(auth()->user(), 'listPageSize', 50)->data;
+
+        // get list of budgets. Count it and split it.
+        $collection = $this->repository->getBudgets();
+        $count      = $collection->count();
+        $budgets    = $collection->slice(($this->parameters->get('page') - 1) * $pageSize, $pageSize);
+
+        // make paginator:
+        $paginator = new LengthAwarePaginator($budgets, $count, $pageSize, $this->parameters->get('page'));
+        $paginator->setPath(route('api.v1.budgets.index') . $this->buildParams());
+
+        /** @var BudgetTransformer $transformer */
+        $transformer = app(BudgetTransformer::class);
+        $transformer->setParameters($this->parameters);
+
+        $resource = new FractalCollection($budgets, $transformer, 'budgets');
+        $resource->setPaginator(new IlluminatePaginatorAdapter($paginator));
+
+        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', self::CONTENT_TYPE);
+    }
+
+    /**
+     * Show a budget.
+     *
+     * @param Budget $budget
+     *
+     * @return JsonResponse
+     * @codeCoverageIgnore
+     */
+    public function show(Budget $budget): JsonResponse
+    {
+        $manager = $this->getManager();
+
+        /** @var BudgetTransformer $transformer */
+        $transformer = app(BudgetTransformer::class);
+        $transformer->setParameters($this->parameters);
+
+        $resource = new Item($budget, $transformer, 'budgets');
+
+        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', self::CONTENT_TYPE);
+    }
+
+}

app/Api/V1/Controllers/Models/Budget/StoreController.php

@@ -0,0 +1,85 @@
+<?php
+/*
+ * StoreController.php
+ * Copyright (c) 2021 james@firefly-iii.org
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Api\V1\Controllers\Models\Budget;
+
+use FireflyIII\Api\V1\Controllers\Controller;
+use FireflyIII\Api\V1\Requests\Models\Budget\StoreRequest;
+use FireflyIII\Exceptions\FireflyException;
+use FireflyIII\Repositories\Budget\BudgetRepositoryInterface;
+use FireflyIII\Transformers\BudgetTransformer;
+use Illuminate\Http\JsonResponse;
+use League\Fractal\Resource\Item;
+
+/**
+ * Class StoreController
+ */
+class StoreController extends Controller
+{
+    private BudgetRepositoryInterface $repository;
+
+    /**
+     * StoreController constructor.
+     *
+     * @codeCoverageIgnore
+     */
+    public function __construct()
+    {
+        parent::__construct();
+        $this->middleware(
+            function ($request, $next) {
+                $this->repository = app(BudgetRepositoryInterface::class);
+                $this->repository->setUser(auth()->user());
+
+                return $next($request);
+            }
+        );
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/budgets/storeBudget
+     *
+     * Store a budget.
+     *
+     * @param StoreRequest $request
+     *
+     * @return JsonResponse
+     * @throws FireflyException
+     *
+     */
+    public function store(StoreRequest $request): JsonResponse
+    {
+        $budget = $this->repository->store($request->getAll());
+        $budget->refresh();
+        $manager = $this->getManager();
+
+        /** @var BudgetTransformer $transformer */
+        $transformer = app(BudgetTransformer::class);
+        $transformer->setParameters($this->parameters);
+
+        $resource = new Item($budget, $transformer, 'budgets');
+
+        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', self::CONTENT_TYPE);
+    }
+}

app/Api/V1/Controllers/Models/Budget/UpdateController.php

@@ -0,0 +1,85 @@
+<?php
+/*
+ * UpdateController.php
+ * Copyright (c) 2021 james@firefly-iii.org
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Api\V1\Controllers\Models\Budget;
+
+use FireflyIII\Api\V1\Controllers\Controller;
+use FireflyIII\Api\V1\Requests\Models\Budget\UpdateRequest;
+use FireflyIII\Models\Budget;
+use FireflyIII\Repositories\Budget\BudgetRepositoryInterface;
+use FireflyIII\Transformers\BudgetTransformer;
+use Illuminate\Http\JsonResponse;
+use League\Fractal\Resource\Item;
+
+/**
+ * Class UpdateController
+ */
+class UpdateController extends Controller
+{
+    private BudgetRepositoryInterface $repository;
+
+    /**
+     * UpdateController constructor.
+     *
+     * @codeCoverageIgnore
+     */
+    public function __construct()
+    {
+        parent::__construct();
+        $this->middleware(
+            function ($request, $next) {
+                $this->repository = app(BudgetRepositoryInterface::class);
+                $this->repository->setUser(auth()->user());
+
+                return $next($request);
+            }
+        );
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/budgets/updateBudget
+     *
+     * Update a budget.
+     *
+     * @param UpdateRequest $request
+     * @param Budget        $budget
+     *
+     * @return JsonResponse
+     */
+    public function update(UpdateRequest $request, Budget $budget): JsonResponse
+    {
+        $data    = $request->getAll();
+        $budget  = $this->repository->update($budget, $data);
+        $manager = $this->getManager();
+
+        /** @var BudgetTransformer $transformer */
+        $transformer = app(BudgetTransformer::class);
+        $transformer->setParameters($this->parameters);
+
+        $resource = new Item($budget, $transformer, 'budgets');
+
+        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', self::CONTENT_TYPE);
+
+    }
+}

app/Api/V1/Controllers/Models/BudgetLimit/DestroyController.php

@@ -0,0 +1,83 @@
+<?php
+/*
+ * DestroyController.php
+ * Copyright (c) 2021 james@firefly-iii.org
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Api\V1\Controllers\Models\BudgetLimit;
+
+use FireflyIII\Api\V1\Controllers\Controller;
+use FireflyIII\Exceptions\FireflyException;
+use FireflyIII\Models\Budget;
+use FireflyIII\Models\BudgetLimit;
+use FireflyIII\Repositories\Budget\BudgetLimitRepositoryInterface;
+use FireflyIII\User;
+use Illuminate\Http\JsonResponse;
+
+/**
+ * Class DestroyController
+ */
+class DestroyController extends Controller
+{
+    private BudgetLimitRepositoryInterface $blRepository;
+
+    /**
+     * BudgetLimitController constructor.
+     *
+     * @codeCoverageIgnore
+     */
+    public function __construct()
+    {
+        parent::__construct();
+        $this->middleware(
+            function ($request, $next) {
+                /** @var User $user */
+                $user               = auth()->user();
+                $this->blRepository = app(BudgetLimitRepositoryInterface::class);
+                $this->blRepository->setUser($user);
+
+                return $next($request);
+            }
+        );
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/budgets/deleteBudgetLimit
+     *
+     * Remove the specified resource from storage.
+     *
+     * @param Budget      $budget
+     * @param BudgetLimit $budgetLimit
+     *
+     * @return JsonResponse
+     * @throws FireflyException
+     * @codeCoverageIgnore
+     */
+    public function destroy(Budget $budget, BudgetLimit $budgetLimit): JsonResponse
+    {
+        if ($budget->id !== $budgetLimit->budget_id) {
+            throw new FireflyException('20028: The budget limit does not belong to the budget.');
+        }
+        $this->blRepository->destroyBudgetLimit($budgetLimit);
+
+        return response()->json([], 204);
+    }
+}

app/Api/V1/Controllers/Models/BudgetLimit/ListController.php

@@ -0,0 +1,125 @@
+<?php
+/*
+ * ListController.php
+ * Copyright (c) 2021 james@firefly-iii.org
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Api\V1\Controllers\Models\BudgetLimit;
+
+use FireflyIII\Api\V1\Controllers\Controller;
+use FireflyIII\Exceptions\FireflyException;
+use FireflyIII\Helpers\Collector\GroupCollectorInterface;
+use FireflyIII\Models\Budget;
+use FireflyIII\Models\BudgetLimit;
+use FireflyIII\Repositories\Budget\BudgetLimitRepositoryInterface;
+use FireflyIII\Support\Http\Api\TransactionFilter;
+use FireflyIII\Transformers\TransactionGroupTransformer;
+use FireflyIII\User;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Http\Request;
+use League\Fractal\Pagination\IlluminatePaginatorAdapter;
+use League\Fractal\Resource\Collection as FractalCollection;
+
+/**
+ * Class ListController
+ */
+class ListController extends Controller
+{
+    use TransactionFilter;
+
+    private BudgetLimitRepositoryInterface $blRepository;
+
+    /**
+     * BudgetLimitController constructor.
+     *
+     * @codeCoverageIgnore
+     */
+    public function __construct()
+    {
+        parent::__construct();
+        $this->middleware(
+            function ($request, $next) {
+                /** @var User $user */
+                $user               = auth()->user();
+                $this->blRepository = app(BudgetLimitRepositoryInterface::class);
+                $this->blRepository->setUser($user);
+
+                return $next($request);
+            }
+        );
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/budgets/listTransactionByBudgetLimit
+     * Show all transactions.
+     *
+     * @param Request     $request
+     * @param Budget      $budget
+     * @param BudgetLimit $budgetLimit
+     *
+     * @return JsonResponse
+     * @throws FireflyException
+     * @codeCoverageIgnore
+     */
+    public function transactions(Request $request, Budget $budget, BudgetLimit $budgetLimit): JsonResponse
+    {
+        $pageSize = (int) app('preferences')->getForUser(auth()->user(), 'listPageSize', 50)->data;
+        $type     = $request->get('type') ?? 'default';
+        $this->parameters->set('type', $type);
+
+        $types   = $this->mapTransactionTypes($this->parameters->get('type'));
+        $manager = $this->getManager();
+
+        /** @var User $admin */
+        $admin = auth()->user();
+
+        // use new group collector:
+        /** @var GroupCollectorInterface $collector */
+        $collector = app(GroupCollectorInterface::class);
+        $collector
+            ->setUser($admin)
+            // filter on budget.
+            ->setBudget($budget)
+            // all info needed for the API:
+            ->withAPIInformation()
+            // set page size:
+            ->setLimit($pageSize)
+            // set page to retrieve
+            ->setPage($this->parameters->get('page'))
+            // set types of transactions to return.
+            ->setTypes($types);
+
+        $collector->setRange($budgetLimit->start_date, $budgetLimit->end_date);
+        $collector->setTypes($types);
+        $paginator = $collector->getPaginatedGroups();
+        $paginator->setPath(route('api.v1.budgets.limits.transactions', [$budget->id, $budgetLimit->id]) . $this->buildParams());
+        $transactions = $paginator->getCollection();
+
+        /** @var TransactionGroupTransformer $transformer */
+        $transformer = app(TransactionGroupTransformer::class);
+        $transformer->setParameters($this->parameters);
+
+        $resource = new FractalCollection($transactions, $transformer, 'transactions');
+        $resource->setPaginator(new IlluminatePaginatorAdapter($paginator));
+
+        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', self::CONTENT_TYPE);
+    }
+}

app/Api/V1/Controllers/Models/BudgetLimit/ShowController.php

@@ -0,0 +1,167 @@
+<?php
+/*
+ * ShowController.php
+ * Copyright (c) 2021 james@firefly-iii.org
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Api\V1\Controllers\Models\BudgetLimit;
+
+use FireflyIII\Api\V1\Controllers\Controller;
+use FireflyIII\Api\V1\Requests\Data\DateRequest;
+use FireflyIII\Exceptions\FireflyException;
+use FireflyIII\Models\Budget;
+use FireflyIII\Models\BudgetLimit;
+use FireflyIII\Repositories\Budget\BudgetLimitRepositoryInterface;
+use FireflyIII\Repositories\Budget\BudgetRepositoryInterface;
+use FireflyIII\Transformers\BudgetLimitTransformer;
+use FireflyIII\User;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Http\Request;
+use Illuminate\Pagination\LengthAwarePaginator;
+use League\Fractal\Pagination\IlluminatePaginatorAdapter;
+use League\Fractal\Resource\Collection as FractalCollection;
+use League\Fractal\Resource\Item;
+
+/**
+ * Class ShowController
+ */
+class ShowController extends Controller
+{
+    private BudgetLimitRepositoryInterface $blRepository;
+    private BudgetRepositoryInterface      $repository;
+
+    /**
+     * BudgetLimitController constructor.
+     *
+     * @codeCoverageIgnore
+     */
+    public function __construct()
+    {
+        parent::__construct();
+        $this->middleware(
+            function ($request, $next) {
+                /** @var User $user */
+                $user               = auth()->user();
+                $this->repository   = app(BudgetRepositoryInterface::class);
+                $this->blRepository = app(BudgetLimitRepositoryInterface::class);
+                $this->repository->setUser($user);
+                $this->blRepository->setUser($user);
+
+                return $next($request);
+            }
+        );
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/budgets/listBudgetLimitByBudget
+     *
+     * Display a listing of the budget limits for this budget.
+     *
+     * @param Request $request
+     * @param Budget  $budget
+     *
+     * @return JsonResponse
+     * @throws FireflyException
+     * @codeCoverageIgnore
+     */
+    public function index(Request $request, Budget $budget): JsonResponse
+    {
+        $manager = $this->getManager();
+        $manager->parseIncludes('budget');
+        $pageSize     = (int) app('preferences')->getForUser(auth()->user(), 'listPageSize', 50)->data;
+        $collection   = $this->blRepository->getBudgetLimits($budget, $this->parameters->get('start'), $this->parameters->get('end'));
+        $count        = $collection->count();
+        $budgetLimits = $collection->slice(($this->parameters->get('page') - 1) * $pageSize, $pageSize);
+        $paginator    = new LengthAwarePaginator($budgetLimits, $count, $pageSize, $this->parameters->get('page'));
+        $paginator->setPath(route('api.v1.budgets.limits.index', [$budget->id]) . $this->buildParams());
+
+        /** @var BudgetLimitTransformer $transformer */
+        $transformer = app(BudgetLimitTransformer::class);
+        $transformer->setParameters($this->parameters);
+
+        $resource = new FractalCollection($budgetLimits, $transformer, 'budget_limits');
+        $resource->setPaginator(new IlluminatePaginatorAdapter($paginator));
+
+        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', self::CONTENT_TYPE);
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/budgets/listBudgetLimit
+     *
+     * Display a listing of the budget limits for this budget.
+     *
+     * @param DateRequest $request
+     *
+     * @return JsonResponse
+     * @throws FireflyException
+     * @codeCoverageIgnore
+     */
+    public function indexAll(DateRequest $request): JsonResponse
+    {
+        $manager = $this->getManager();
+        $manager->parseIncludes('budget');
+        $pageSize     = (int) app('preferences')->getForUser(auth()->user(), 'listPageSize', 50)->data;
+        $collection   = $this->blRepository->getAllBudgetLimits($this->parameters->get('start'), $this->parameters->get('end'));
+        $count        = $collection->count();
+        $budgetLimits = $collection->slice(($this->parameters->get('page') - 1) * $pageSize, $pageSize);
+        $paginator    = new LengthAwarePaginator($budgetLimits, $count, $pageSize, $this->parameters->get('page'));
+        $paginator->setPath(route('api.v1.budget-limits.index') . $this->buildParams());
+
+        /** @var BudgetLimitTransformer $transformer */
+        $transformer = app(BudgetLimitTransformer::class);
+        $transformer->setParameters($this->parameters);
+
+        $resource = new FractalCollection($budgetLimits, $transformer, 'budget_limits');
+        $resource->setPaginator(new IlluminatePaginatorAdapter($paginator));
+
+        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', self::CONTENT_TYPE);
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/budgets/getBudgetLimit
+     *
+     * @param Request     $request
+     * @param Budget      $budget
+     * @param BudgetLimit $budgetLimit
+     *
+     * @return JsonResponse
+     * @throws FireflyException
+     */
+    public function show(Request $request, Budget $budget, BudgetLimit $budgetLimit): JsonResponse
+    {
+        if ((int) $budget->id !== (int) $budgetLimit->budget_id) {
+            throw new FireflyException('20028: The budget limit does not belong to the budget.');
+        }
+        // continue!
+        $manager = $this->getManager();
+
+        /** @var BudgetLimitTransformer $transformer */
+        $transformer = app(BudgetLimitTransformer::class);
+        $transformer->setParameters($this->parameters);
+
+        $resource = new Item($budgetLimit, $transformer, 'budget_limits');
+
+        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', self::CONTENT_TYPE);
+    }
+
+}

app/Api/V1/Controllers/Models/BudgetLimit/StoreController.php

@@ -0,0 +1,90 @@
+<?php
+/*
+ * StoreController.php
+ * Copyright (c) 2021 james@firefly-iii.org
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Api\V1\Controllers\Models\BudgetLimit;
+
+use FireflyIII\Api\V1\Controllers\Controller;
+use FireflyIII\Api\V1\Requests\Models\BudgetLimit\StoreRequest;
+use FireflyIII\Models\Budget;
+use FireflyIII\Repositories\Budget\BudgetLimitRepositoryInterface;
+use FireflyIII\Transformers\BudgetLimitTransformer;
+use FireflyIII\User;
+use Illuminate\Http\JsonResponse;
+use League\Fractal\Resource\Item;
+
+/**
+ * Class StoreController
+ */
+class StoreController extends Controller
+{
+    private BudgetLimitRepositoryInterface $blRepository;
+
+    /**
+     * BudgetLimitController constructor.
+     *
+     * @codeCoverageIgnore
+     */
+    public function __construct()
+    {
+        parent::__construct();
+        $this->middleware(
+            function ($request, $next) {
+                /** @var User $user */
+                $user               = auth()->user();
+                $this->blRepository = app(BudgetLimitRepositoryInterface::class);
+                $this->blRepository->setUser($user);
+
+                return $next($request);
+            }
+        );
+    }
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/budgets/storeBudgetLimit
+     *
+     * Store a newly created resource in storage.
+     *
+     * @param StoreRequest $request
+     * @param Budget       $budget
+     *
+     * @return JsonResponse
+     */
+    public function store(StoreRequest $request, Budget $budget): JsonResponse
+    {
+        $data               = $request->getAll();
+        $data['start_date'] = $data['start'];
+        $data['end_date']   = $data['end'];
+        $data['budget_id']  = $budget->id;
+
+        $budgetLimit = $this->blRepository->store($data);
+        $manager     = $this->getManager();
+        /** @var BudgetLimitTransformer $transformer */
+        $transformer = app(BudgetLimitTransformer::class);
+        $transformer->setParameters($this->parameters);
+
+        $resource = new Item($budgetLimit, $transformer, 'budget_limits');
+
+        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', self::CONTENT_TYPE);
+    }
+}

app/Api/V1/Controllers/Models/BudgetLimit/UpdateController.php

@@ -0,0 +1,97 @@
+<?php
+/*
+ * UpdateController.php
+ * Copyright (c) 2021 james@firefly-iii.org
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Api\V1\Controllers\Models\BudgetLimit;
+
+use FireflyIII\Api\V1\Controllers\Controller;
+use FireflyIII\Api\V1\Requests\Models\BudgetLimit\UpdateRequest;
+use FireflyIII\Exceptions\FireflyException;
+use FireflyIII\Models\Budget;
+use FireflyIII\Models\BudgetLimit;
+use FireflyIII\Repositories\Budget\BudgetLimitRepositoryInterface;
+use FireflyIII\Transformers\BudgetLimitTransformer;
+use FireflyIII\User;
+use Illuminate\Http\JsonResponse;
+use League\Fractal\Resource\Item;
+
+/**
+ * Class UpdateController
+ */
+class UpdateController extends Controller
+{
+    private BudgetLimitRepositoryInterface $blRepository;
+
+    /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/#/budgets/updateBudgetLimit
+     *
+     * BudgetLimitController constructor.
+     *
+     * @codeCoverageIgnore
+     */
+    public function __construct()
+    {
+        parent::__construct();
+        $this->middleware(
+            function ($request, $next) {
+                /** @var User $user */
+                $user               = auth()->user();
+                $this->blRepository = app(BudgetLimitRepositoryInterface::class);
+                $this->blRepository->setUser($user);
+
+                return $next($request);
+            }
+        );
+    }
+
+    /**
+     * Update the specified resource in storage.
+     *
+     * @param UpdateRequest $request
+     * @param Budget        $budget
+     * @param BudgetLimit   $budgetLimit
+     *
+     * @return JsonResponse
+     * @throws FireflyException
+     */
+    public function update(UpdateRequest $request, Budget $budget, BudgetLimit $budgetLimit): JsonResponse
+    {
+
+        if ((int) $budget->id !== (int) $budgetLimit->budget_id) {
+            throw new FireflyException('20028: The budget limit does not belong to the budget.');
+        }
+        $data              = $request->getAll();
+        $data['budget_id'] = $budget->id;
+        $budgetLimit       = $this->blRepository->update($budgetLimit, $data);
+        $manager           = $this->getManager();
+
+        /** @var BudgetLimitTransformer $transformer */
+        $transformer = app(BudgetLimitTransformer::class);
+        $transformer->setParameters($this->parameters);
+
+        $resource = new Item($budgetLimit, $transformer, 'budget_limits');
+
+        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', self::CONTENT_TYPE);
+
+    }
+}