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[friendica.git] / src / Model / Post / Link.php
1 <?php
2 /**
3  * @copyright Copyright (C) 2010-2021, the Friendica project
4  *
5  * @license GNU AGPL version 3 or any later version
6  *
7  * This program is free software: you can redistribute it and/or modify
8  * it under the terms of the GNU Affero General Public License as
9  * published by the Free Software Foundation, either version 3 of the
10  * License, or (at your option) any later version.
11  *
12  * This program is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15  * GNU Affero General Public License for more details.
16  *
17  * You should have received a copy of the GNU Affero General Public License
18  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
19  *
20  */
21
22 namespace Friendica\Model\Post;
23
24 use Friendica\Core\Logger;
25 use Friendica\Database\DBA;
26 use Friendica\DI;
27 use Friendica\Util\Proxy;
28
29 /**
30  * Class Link
31  *
32  * This Model class handles post related external links
33  */
34 class Link
35 {
36         public static function getByLink(int $uri_id, string $url, $size = '')
37         {
38                 if (empty($uri_id) || empty($url) || Proxy::isLocalImage($url)) {
39                         return $url;
40                 }
41
42                 if (!in_array(parse_url($url, PHP_URL_SCHEME), ['http', 'https'])) {
43                         Logger::info('Bad URL, quitting', ['uri-id' => $uri_id, 'url' => $url]);
44                         return $url;
45                 }
46
47                 $link = DBA::selectFirst('post-link', ['id'], ['uri-id' => $uri_id, 'url' => $url]);
48                 if (!empty($link['id'])) {
49                         $id = $link['id'];
50                         Logger::info('Found', ['id' => $id, 'uri-id' => $uri_id, 'url' => $url]);
51                 } else {
52                         $mime = self::fetchMimeType($url);
53
54                         DBA::insert('post-link', ['uri-id' => $uri_id, 'url' => $url, 'mimetype' => $mime]);
55                         $id = DBA::lastInsertId();
56                         Logger::info('Inserted', ['id' => $id, 'uri-id' => $uri_id, 'url' => $url]);
57                 }
58
59                 if (empty($id)) {
60                         return $url;
61                 }
62
63                 $url = DI::baseUrl() . '/photo/link/';
64                 switch ($size) {
65                         case Proxy::SIZE_MICRO:
66                                 $url .= Proxy::PIXEL_MICRO . '/';
67                                 break;
68                         case Proxy::SIZE_THUMB:
69                                 $url .= Proxy::PIXEL_THUMB . '/';
70                                 break;
71                         case Proxy::SIZE_SMALL:
72                                 $url .= Proxy::PIXEL_SMALL . '/';
73                                 break;
74                         case Proxy::SIZE_MEDIUM:
75                                 $url .= Proxy::PIXEL_MEDIUM . '/';
76                                 break;
77                         case Proxy::SIZE_LARGE:
78                                 $url .= Proxy::PIXEL_LARGE . '/';
79                                 break;
80                 }
81                 return $url . $id;
82         }
83
84         private static function fetchMimeType(string $url)
85         {
86                 $timeout = DI::config()->get('system', 'xrd_timeout');
87
88                 $curlResult = DI::httpRequest()->head($url, ['timeout' => $timeout]);
89                 if ($curlResult->isSuccess()) {
90                         if (empty($media['mimetype'])) {
91                                 return $curlResult->getHeader('Content-Type');
92                         }
93                 }
94                 return '';
95         }
96
97         /**
98          * Add external links and replace them in the body
99          *
100          * @param integer $uriid
101          * @param string $body
102          * @return string Body with replaced links
103          */
104         public static function insertFromBody(int $uriid, string $body)
105         {
106                 if (preg_match_all("/\[img\=([0-9]*)x([0-9]*)\](http.*?)\[\/img\]/ism", $body, $pictures, PREG_SET_ORDER)) {
107                         foreach ($pictures as $picture) {
108                                 $body = str_replace($picture[3], self::getByLink($uriid, $picture[3]), $body);
109                         }
110                 }
111
112                 if (preg_match_all("/\[img=(http[^\[\]]*)\]([^\[\]]*)\[\/img\]/Usi", $body, $pictures, PREG_SET_ORDER)) {
113                         foreach ($pictures as $picture) {
114                                 $body = str_replace($picture[1], self::getByLink($uriid, $picture[1]), $body);
115                         }
116                 }
117
118                 if (preg_match_all("/\[img\](http[^\[\]]*)\[\/img\]/ism", $body, $pictures, PREG_SET_ORDER)) {
119                         foreach ($pictures as $picture) {
120                                 $body = str_replace($picture[1], self::getByLink($uriid, $picture[1]), $body);
121                         }
122                 }
123
124                 return trim($body);
125         }
126 }