<?php
/**
 * webtrees: online genealogy
 * Copyright (C) 2018 webtrees development team
 * This program 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.
 * 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 General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
declare(strict_types=1);

namespace Fisharebest\Webtrees\Http\Middleware;

use Closure;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;

/**
 * Middleware to check whether the site is offline.
 */
class CheckForMaintenanceMode implements MiddlewareInterface
{
    /**
     * @param Request $request
     * @param Closure $next
     *
     * @return Response
     */
    public function handle(Request $request, Closure $next): Response
    {
        $file = WT_ROOT . 'data/offline.txt';

        if (file_exists($file)) {
            $html = view('layouts/offline', [
                'message' => file_get_contents($file),
                'url'     => $request->getRequestUri(),
            ]);

            return new Response($html, Response::HTTP_SERVICE_UNAVAILABLE);
        }

        return $next($request);
    }
}