firefly-iii/app/Http/Middleware/Authenticate.php

<?php
/**
 * Authenticate.php
 * Copyright (c) 2018 thegrumpydictator@gmail.com
 *
 * This file is part of Firefly III.
 *
 * Firefly III is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Firefly III 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Firefly III. If not, see <http://www.gnu.org/licenses/>.
 */

namespace FireflyIII\Http\Middleware;

use Closure;
use Illuminate\Auth\AuthenticationException;
use Illuminate\Contracts\Auth\Factory as Auth;

/**
 * Class Authenticate
 */
class Authenticate
{
    /**
     * The authentication factory instance.
     *
     * @var \Illuminate\Contracts\Auth\Factory
     */
    protected $auth;

    /**
     * Create a new middleware instance.
     *
     * @param  \Illuminate\Contracts\Auth\Factory $auth
     *
     * @return void
     */
    public function __construct(Auth $auth)
    {
        $this->auth = $auth;
    }

    /**
     * Handle an incoming request.
     *
     * @param  \Illuminate\Http\Request $request
     * @param  \Closure                 $next
     * @param  string[]                 ...$guards
     *
     * @return mixed
     *
     * @throws \Illuminate\Auth\AuthenticationException
     */
    public function handle($request, Closure $next, ...$guards)
    {
        $this->authenticate($guards);

        return $next($request);
    }

    /**
     * Determine if the user is logged in to any of the given guards.
     *
     * @param  array $guards
     *
     * @return void
     *
     * @throws \Illuminate\Auth\AuthenticationException
     */
    protected function authenticate(array $guards)
    {
        if (empty($guards)) {
            // go for default guard:
            if ($this->auth->check()) {
                // do an extra check on user object.
                $user = $this->auth->authenticate();
                if (1 === intval($user->blocked)) {
                    $message = strval(trans('firefly.block_account_logout'));
                    if ('email_changed' === $user->blocked_code) {
                        $message = strval(trans('firefly.email_changed_logout'));
                    }

                    app('session')->flash('logoutMessage', $message);
                    $this->auth->logout();

                    return redirect()->guest('login');
                }
            }

            return $this->auth->authenticate();
        }

        foreach ($guards as $guard) {
            if ($this->auth->guard($guard)->check()) {
                return $this->auth->shouldUse($guard);
            }
        }

        throw new AuthenticationException('Unauthenticated.', $guards);
    }
}