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\Core\System;
  26 use Friendica\Database\Database;
  27 use Friendica\Database\DBA;
  28 use Friendica\DI;
  29 use Friendica\Util\Proxy;
  30
  31 /**
  32  * Class Link
  33  *
  34  * This Model class handles post related external links
  35  */
  36 class Link
  37 {
  38         public static function getByLink(int $uri_id, string $url, $size = '')
  39         {
  40                 if (empty($uri_id) || empty($url) || Proxy::isLocalImage($url)) {
  41                         return $url;
  42                 }
  43
  44                 if (!in_array(parse_url($url, PHP_URL_SCHEME), ['http', 'https'])) {
  45                         Logger::info('Bad URL, quitting', ['uri-id' => $uri_id, 'url' => $url, 'callstack' => System::callstack(20)]);
  46                         return $url;
  47                 }
  48
  49                 $link = DBA::selectFirst('post-link', ['id'], ['uri-id' => $uri_id, 'url' => $url]);
  50                 if (!empty($link['id'])) {
  51                         $id = $link['id'];
  52                         Logger::info('Found', ['id' => $id, 'uri-id' => $uri_id, 'url' => $url]);
  53                 } else {
  54                         $mime = self::fetchMimeType($url);
  55
  56                         DBA::insert('post-link', ['uri-id' => $uri_id, 'url' => $url, 'mimetype' => $mime], Database::INSERT_IGNORE);
  57                         $id = DBA::lastInsertId();
  58                         Logger::info('Inserted', ['id' => $id, 'uri-id' => $uri_id, 'url' => $url]);
  59                 }
  60
  61                 if (empty($id)) {
  62                         return $url;
  63                 }
  64
  65                 $url = DI::baseUrl() . '/photo/link/';
  66                 switch ($size) {
  67                         case Proxy::SIZE_MICRO:
  68                                 $url .= Proxy::PIXEL_MICRO . '/';
  69                                 break;
  70                         case Proxy::SIZE_THUMB:
  71                                 $url .= Proxy::PIXEL_THUMB . '/';
  72                                 break;
  73                         case Proxy::SIZE_SMALL:
  74                                 $url .= Proxy::PIXEL_SMALL . '/';
  75                                 break;
  76                         case Proxy::SIZE_MEDIUM:
  77                                 $url .= Proxy::PIXEL_MEDIUM . '/';
  78                                 break;
  79                         case Proxy::SIZE_LARGE:
  80                                 $url .= Proxy::PIXEL_LARGE . '/';
  81                                 break;
  82                 }
  83                 return $url . $id;
  84         }
  85
  86         private static function fetchMimeType(string $url)
  87         {
  88                 $timeout = DI::config()->get('system', 'xrd_timeout');
  89
  90                 $curlResult = DI::httpRequest()->head($url, ['timeout' => $timeout]);
  91                 if ($curlResult->isSuccess()) {
  92                         if (empty($media['mimetype'])) {
  93                                 return $curlResult->getHeader('Content-Type')[0] ?? '';
  94                         }
  95                 }
  96                 return '';
  97         }
  98
  99         /**
 100          * Add external links and replace them in the body
 101          *
 102          * @param integer $uriid
 103          * @param string $body
 104          * @return string Body with replaced links
 105          */
 106         public static function insertFromBody(int $uriid, string $body)
 107         {
 108                 if (preg_match_all("/\[img\=([0-9]*)x([0-9]*)\](http.*?)\[\/img\]/ism", $body, $pictures, PREG_SET_ORDER)) {
 109                         foreach ($pictures as $picture) {
 110                                 $body = str_replace($picture[3], self::getByLink($uriid, $picture[3]), $body);
 111                         }
 112                 }
 113
 114                 if (preg_match_all("/\[img=(http[^\[\]]*)\]([^\[\]]*)\[\/img\]/Usi", $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                 if (preg_match_all("/\[img\](http[^\[\]]*)\[\/img\]/ism", $body, $pictures, PREG_SET_ORDER)) {
 121                         foreach ($pictures as $picture) {
 122                                 $body = str_replace($picture[1], self::getByLink($uriid, $picture[1]), $body);
 123                         }
 124                 }
 125
 126                 return trim($body);
 127         }
 128 }