xref: /webtrees/app/Http/RequestHandlers/RobotsTxt.php (revision 9b152ff9230017d2c03aa1bf603a98b18250446d) 
1<?php
2
3/**
4 * webtrees: online genealogy
5 * Copyright (C) 2019 webtrees development team
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <http://www.gnu.org/licenses/>.
16 */
17
18declare(strict_types=1);
19
20namespace Fisharebest\Webtrees\Http\RequestHandlers;
21
22use Fisharebest\Webtrees\Module\SiteMapModule;
23use Fisharebest\Webtrees\Services\ModuleService;
24use Psr\Http\Message\ResponseInterface;
25use Psr\Http\Message\ServerRequestInterface;
26use Psr\Http\Server\RequestHandlerInterface;
27
28use function response;
29
30use const PHP_URL_PATH;
31
32/**
33 * Generate a robots exclusion file.
34 *
35 * @link https://robotstxt.org
36 */
37class RobotsTxt implements RequestHandlerInterface
38{
39    private const DISALLOWED_PATHS = [
40        'admin',
41        'manager',
42        'moderator',
43        'editor',
44        'account',
45    ];
46
47    /** @var ModuleService */
48    private $module_service;
49
50    /**
51     * @param ModuleService $module_service
52     */
53    public function __construct(ModuleService $module_service)
54    {
55        $this->module_service = $module_service;
56    }
57
58    /**
59     * @param ServerRequestInterface $request
60     *
61     * @return ResponseInterface
62     */
63    public function handle(ServerRequestInterface $request): ResponseInterface
64    {
65        $base_url = $request->getAttribute('base_url');
66
67        $data = [
68            'base_url'         => $base_url,
69            'base_path'        => parse_url($base_url, PHP_URL_PATH) ?? '',
70            'disallowed_paths' => self::DISALLOWED_PATHS,
71            'sitemap_url'      => '',
72        ];
73
74        $sitemap_module = $this->module_service->findByInterface(SiteMapModule::class)->first();
75
76        if ($sitemap_module instanceof SiteMapModule) {
77            $data['sitemap_url'] = route('module', [
78                'module' => $sitemap_module->name(),
79                'action' => 'Index',
80            ]);
81        }
82
83        return response(view('robots-txt', $data))
84            ->withHeader('Content-type', 'text/plain');
85    }
86}
87