Some basic code for liability accounts.

app/Http/Controllers/Account/ShowController.php

@@ -91,6 +91,11 @@ class ShowController extends Controller
         if (AccountType::INITIAL_BALANCE === $account->accountType->type) {
             return $this->redirectToOriginalAccount($account);
         }
+        // a basic thing to determin if this account is a liability:
+        if ($this->repository->isLiability($account)) {
+            return redirect(route('accounts.show.all', [$account->id]));
+        }
+
         /** @var Carbon $start */
         $start = $start ?? session('start');
         /** @var Carbon $end */
@@ -122,9 +127,13 @@ class ShowController extends Controller
         $transactions->setPath(route('accounts.show', [$account->id, $start->format('Y-m-d'), $end->format('Y-m-d')]));
         $showAll = false;
 
+
         return view(
             'accounts.show',
-            compact('account', 'showAll', 'what', 'currency', 'today', 'periods', 'subTitleIcon', 'transactions', 'subTitle', 'start', 'end', 'chartUri')
+            compact(
+                'account', 'showAll', 'what', 'currency', 'today', 'periods', 'subTitleIcon', 'transactions', 'subTitle', 'start', 'end',
+                'chartUri'
+            )
         );
     }
 
@@ -144,6 +153,7 @@ class ShowController extends Controller
         if (AccountType::INITIAL_BALANCE === $account->accountType->type) {
             return $this->redirectToOriginalAccount($account); // @codeCoverageIgnore
         }
+        $isLiability  = $this->repository->isLiability($account);
         $end          = new Carbon;
         $today        = new Carbon;
         $start        = $this->repository->oldestJournalDate($account) ?? Carbon::now()->startOfMonth();
@@ -167,7 +177,7 @@ class ShowController extends Controller
 
         return view(
             'accounts.show',
-            compact('account', 'showAll', 'currency', 'today', 'chartUri', 'periods', 'subTitleIcon', 'transactions', 'subTitle', 'start', 'end')
+            compact('account', 'showAll','isLiability', 'currency', 'today', 'chartUri', 'periods', 'subTitleIcon', 'transactions', 'subTitle', 'start', 'end')
         );
     }
 

app/Repositories/Account/AccountRepository.php

@@ -270,6 +270,30 @@ class AccountRepository implements AccountRepositoryInterface
         return $factory->findOrCreate('Cash account', $type->type);
     }
 
+    /**
+     * @param $account
+     *
+     * @return string
+     */
+    public function getInterestPerDay(Account $account): string
+    {
+        $interest       = $this->getMetaValue($account, 'interest');
+        $interestPeriod = $this->getMetaValue($account, 'interest_period');
+        Log::debug(sprintf('Start with interest of %s percent', $interest));
+
+        // calculate
+        if ('monthly' === $interestPeriod) {
+            $interest = bcdiv(bcmul($interest, '12'), '365'); // per year
+            Log::debug(sprintf('Interest is now (monthly to daily) %s percent', $interest));
+        }
+        if ('yearly' === $interestPeriod) {
+            $interest = bcdiv($interest, '365'); // per year
+            Log::debug(sprintf('Interest is now (yearly to daily) %s percent', $interest));
+        }
+
+        return $interest;
+    }
+
     /**
      * Return meta value for account. Null if not found.
      *
@@ -382,6 +406,57 @@ class AccountRepository implements AccountRepositoryInterface
         return $account;
     }
 
+    /**
+     * @param Account $account
+     *
+     * @return bool
+     */
+    public function isLiability(Account $account): bool
+    {
+        return \in_array($account->accountType->type, [AccountType::CREDITCARD, AccountType::LOAN, AccountType::DEBT, AccountType::MORTGAGE], true);
+    }
+
+    /**
+     * Returns the date of the very last transaction in this account.
+     *
+     * @param Account $account
+     *
+     * @return TransactionJournal|null
+     */
+    public function latestJournal(Account $account): ?TransactionJournal
+    {
+        $first = $account->transactions()
+                         ->leftJoin('transaction_journals', 'transaction_journals.id', '=', 'transactions.transaction_journal_id')
+                         ->orderBy('transaction_journals.date', 'DESC')
+                         ->orderBy('transaction_journals.order', 'ASC')
+                         ->where('transaction_journals.user_id', $this->user->id)
+                         ->orderBy('transaction_journals.id', 'DESC')
+                         ->first(['transaction_journals.id']);
+        if (null !== $first) {
+            return TransactionJournal::find((int)$first->id);
+        }
+
+        return null;
+    }
+
+    /**
+     * Returns the date of the very last transaction in this account.
+     *
+     * @param Account $account
+     *
+     * @return Carbon|null
+     */
+    public function latestJournalDate(Account $account): ?Carbon
+    {
+        $result  = null;
+        $journal = $this->latestJournal($account);
+        if (null !== $journal) {
+            $result = $journal->date;
+        }
+
+        return $result;
+    }
+
     /**
      * Returns the date of the very first transaction in this account.
      *

app/Repositories/Account/AccountRepositoryInterface.php

@@ -123,6 +123,13 @@ interface AccountRepositoryInterface
      */
     public function getCashAccount(): Account;
 
+    /**
+     * @param $account
+     *
+     * @return string
+     */
+    public function getInterestPerDay(Account $account): string;
+
     /**
      * Return meta value for account. Null if not found.
      *
@@ -151,7 +158,6 @@ interface AccountRepositoryInterface
      */
     public function getOpeningBalanceAmount(Account $account): ?string;
 
-
     /**
      * Return date of opening balance as string or null.
      *
@@ -170,6 +176,31 @@ interface AccountRepositoryInterface
      */
     public function getReconciliation(Account $account): ?Account;
 
+    /**
+     * @param Account $account
+     *
+     * @return bool
+     */
+    public function isLiability(Account $account): bool;
+
+    /**
+     * Returns the date of the very first transaction in this account.
+     *
+     * @param Account $account
+     *
+     * @return TransactionJournal|null
+     */
+    public function latestJournal(Account $account): ?TransactionJournal;
+
+    /**
+     * Returns the date of the very last transaction in this account.
+     *
+     * @param Account $account
+     *
+     * @return Carbon|null
+     */
+    public function latestJournalDate(Account $account): ?Carbon;
+
     /**
      * Returns the date of the very first transaction in this account.
      *

resources/lang/en_US/firefly.php

@@ -902,7 +902,7 @@ return [
     'errors'                                  => 'Errors',
     'debt_start_date'                         => 'Start date of debt',
     'debt_start_amount'                       => 'Start amount of debt',
-    'debt_start_amount_help'                  => 'Please enter a positive amount. You may also enter the current amount, if the original amount was way-back-when.',
+    'debt_start_amount_help'                  => 'Please enter the original amount of this liability as a positive number. You may also enter the current amount. Make sure to edit the date below to match.',
     'store_new_liabilities_account'           => 'Store new liability',
     'edit_liabilities_account'                => 'Edit liability ":name"',
 

resources/views/accounts/show.twig

@@ -6,30 +6,51 @@
 
 {% block content %}
 
-        <div class="row">
+    <div class="row">
-            <div class="col-lg-12 col-md-12 col-sm-12 col-xs-12">
+        <div class="col-lg-12 col-md-12 col-sm-12 col-xs-12">
-                <div class="box">
+            <div class="box">
-                    <div class="box-header with-border">
+                <div class="box-header with-border">
-                        <h3 class="box-title">
+                    <h3 class="box-title">
-                            {{ trans('firefly.chart_account_in_period', {name: account.name, start: start.formatLocalized(monthAndDayFormat), end: end.formatLocalized(monthAndDayFormat) }) }}
+                        {{ trans('firefly.chart_account_in_period', {name: account.name, start: start.formatLocalized(monthAndDayFormat), end: end.formatLocalized(monthAndDayFormat) }) }}
-                        </h3>
+                    </h3>
-                        <div class="box-tools pull-right">
+                    <div class="box-tools pull-right">
-                            <div class="btn-group">
+                        <div class="btn-group">
-                                <button class="btn btn-box-tool dropdown-toggle" data-toggle="dropdown"><i class="fa fa-ellipsis-v"></i></button>
+                            <button class="btn btn-box-tool dropdown-toggle" data-toggle="dropdown"><i class="fa fa-ellipsis-v"></i></button>
-                                <ul class="dropdown-menu" role="menu">
+                            <ul class="dropdown-menu" role="menu">
-                                    <li><a href="{{ route('accounts.edit', account.id) }}"><i class="fa fa-pencil fa-fw"></i> {{ 'edit'|_ }}</a></li>
+                                <li><a href="{{ route('accounts.edit', account.id) }}"><i class="fa fa-pencil fa-fw"></i> {{ 'edit'|_ }}</a></li>
-                                    <li><a href="{{ route('accounts.delete', account.id) }}"><i class="fa fa-trash fa-fw"></i> {{ 'delete'|_ }}</a></li>
+                                <li><a href="{{ route('accounts.delete', account.id) }}"><i class="fa fa-trash fa-fw"></i> {{ 'delete'|_ }}</a></li>
-                                </ul>
+                            </ul>
-                            </div>
                         </div>
                     </div>
-                    <div class="box-body">
+                </div>
+                <div class="box-body">
+                    <div>
                         <canvas id="overview-chart" style="width:100%;height:400px;" height="400" width="100%"></canvas>
                     </div>
+                    <p>
+                    {% if isLiability %}
+                        <em>This chart pre-calculates rent starting from the last transaction you've entered. It's just an estimation.</em>
+                    {% endif %}
+                    </p>
+                </div>
+            </div>
+        </div>
+    </div>
+    {% if not showAll and isLiability %}
+        <div class="row">
+            <div class="col-lg-4 col-md-6 col-sm-12 col-xs-12">
+                <div class="box">
+                    <div class="box-header with-border">
+                        <h3 class="box-title">pay-off by date</h3>
+                    </div>
+                    <div class="box-body">
+                        Content
+                    </div>
                 </div>
             </div>
         </div>
-    {% if not showAll %}
+    {% endif %}
+    {% if not showAll and not isLiability %}
         <div class="row">
             <div class="col-lg-4 col-md-6 col-sm-12 col-xs-12">
                 <div class="box">