firefly-iii/app/Http/Controllers/Auth/LoginController.php

<?php
declare(strict_types=1);


/**
 * LoginController.php
 * Copyright (c) 2017 thegrumpydictator@gmail.com
 * This software may be modified and distributed under the terms of the
 * Creative Commons Attribution-ShareAlike 4.0 International License.
 *
 * See the LICENSE file for details.
 */

namespace FireflyIII\Http\Controllers\Auth;

use FireflyConfig;
use FireflyIII\Http\Controllers\Controller;
use FireflyIII\User;
use Illuminate\Cookie\CookieJar;
use Illuminate\Foundation\Auth\AuthenticatesUsers;
use Illuminate\Http\Request;


class LoginController extends Controller
{
    /*
    |--------------------------------------------------------------------------
    | Login Controller
    |--------------------------------------------------------------------------
    |
    | This controller handles authenticating users for the application and
    | redirecting them to your home screen. The controller uses a trait
    | to conveniently provide its functionality to your applications.
    |
    */

    use AuthenticatesUsers;

    /**
     * Where to redirect users after login.
     *
     * @var string
     */
    protected $redirectTo = '/home';

    /**
     * Create a new controller instance.
     *
     */
    public function __construct()
    {
        parent::__construct();
        $this->middleware('guest')->except('logout');
    }

    /**
     * Show the application's login form.
     *
     * @return \Illuminate\Http\Response
     */
    public function showLoginForm(Request $request, CookieJar $cookieJar)
    {
        // forget 2fa cookie:
        $cookie = $cookieJar->forever('twoFactorAuthenticated', 'false');

        // is allowed to?
        $singleUserMode    = FireflyConfig::get('single_user_mode', config('firefly.configuration.single_user_mode'))->data;
        $userCount         = User::count();
        $allowRegistration = true;
        if ($singleUserMode === true && $userCount > 0) {
            $allowRegistration = false;
        }

        $email    = $request->old('email');
        $remember = $request->old('remember');

        return view('auth.login', compact('allowRegistration', 'email', 'remember'))->withCookie($cookie);
    }
}