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, $size = '')
  37         {
  38                 if (empty($url) || Proxy::isLocalImage($url)) {
  39                         return $url;
  40                 }
  41
  42                 $link = DBA::selectFirst('post-link', ['id'], ['uri-id' => $uri_id, 'url' => $url]);
  43                 if (!empty($link['id'])) {
  44                         $id = $link['id'];
  45                         Logger::info('Found', ['id' => $id, 'url' => $url]);
  46                 } else {
  47                         $mime = self::fetchMimeType($url);
  48
  49                         DBA::insert('post-link', ['uri-id' => $uri_id, 'url' => $url, 'mimetype' => $mime]);
  50                         $id = DBA::lastInsertId();
  51                         Logger::info('Inserted', ['id' => $id, 'url' => $url]);
  52                 }
  53
  54                 if (empty($id)) {
  55                         return $url;
  56                 }
  57
  58                 $url = DI::baseUrl() . '/photo/link/';
  59                 switch ($size) {
  60                         case Proxy::SIZE_MICRO:
  61                                 $url .= Proxy::PIXEL_MICRO . '/';
  62                                 break;
  63                         case Proxy::SIZE_THUMB:
  64                                 $url .= Proxy::PIXEL_THUMB . '/';
  65                                 break;
  66                         case Proxy::SIZE_SMALL:
  67                                 $url .= Proxy::PIXEL_SMALL . '/';
  68                                 break;
  69                         case Proxy::SIZE_MEDIUM:
  70                                 $url .= Proxy::PIXEL_MEDIUM . '/';
  71                                 break;
  72                         case Proxy::SIZE_LARGE:
  73                                 $url .= Proxy::PIXEL_LARGE . '/';
  74                                 break;
  75                 }
  76                 return $url . $id;
  77         }
  78
  79         private static function fetchMimeType(string $url)
  80         {
  81                 $timeout = DI::config()->get('system', 'xrd_timeout');
  82                 $curlResult = DI::httpRequest()->head($url, ['timeout' => $timeout]);
  83                 if ($curlResult->isSuccess()) {
  84                         if (empty($media['mimetype'])) {
  85                                 return $curlResult->getHeader('Content-Type');
  86                         }
  87                 }
  88                 return '';
  89         }
  90
  91         /**
  92          * Add external links and replace them in the body
  93          *
  94          * @param integer $uriid
  95          * @param string $body
  96          * @return string Body with replaced links
  97          */
  98         public static function insertFromBody(int $uriid, string $body)
  99         {
 100                 if (preg_match_all("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism", $body, $pictures, PREG_SET_ORDER)) {
 101                         foreach ($pictures as $picture) {
 102                                 $body = str_replace($picture[3], self::getByLink($uriid, $picture[3]), $body);
 103                         }
 104                 }
 105
 106                 if (preg_match_all("/\[img=([^\[\]]*)\]([^\[\]]*)\[\/img\]/Usi", $body, $pictures, PREG_SET_ORDER)) {
 107                         foreach ($pictures as $picture) {
 108                                 if (parse_url($picture[1], PHP_URL_SCHEME)) {
 109                                         $body = str_replace($picture[1], self::getByLink($uriid, $picture[1]), $body);
 110                                 }
 111                         }
 112                 }
 113
 114                 if (preg_match_all("/\[img\]([^\[\]]*)\[\/img\]/ism", $body, $pictures, PREG_SET_ORDER)) {
 115                         foreach ($pictures as $picture) {
 116                                 $body = str_replace($picture[1], self::getByLink($uriid, $picture[1]), $body);
 117                         }
 118                 }
 119
 120                 return trim($body);
 121         }
 122 }