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\Network\HTTPClientOptions;
  30 use Friendica\Util\Proxy;
  31
  32 /**
  33  * Class Link
  34  *
  35  * This Model class handles post related external links
  36  */
  37 class Link
  38 {
  39         public static function getByLink(int $uri_id, string $url, $size = '')
  40         {
  41                 if (empty($uri_id) || empty($url) || Proxy::isLocalImage($url)) {
  42                         return $url;
  43                 }
  44
  45                 if (!in_array(parse_url($url, PHP_URL_SCHEME), ['http', 'https'])) {
  46                         Logger::info('Bad URL, quitting', ['uri-id' => $uri_id, 'url' => $url, 'callstack' => System::callstack(20)]);
  47                         return $url;
  48                 }
  49
  50                 $link = DBA::selectFirst('post-link', ['id'], ['uri-id' => $uri_id, 'url' => $url]);
  51                 if (!empty($link['id'])) {
  52                         $id = $link['id'];
  53                         Logger::info('Found', ['id' => $id, 'uri-id' => $uri_id, 'url' => $url]);
  54                 } else {
  55                         $mime = self::fetchMimeType($url);
  56
  57                         DBA::insert('post-link', ['uri-id' => $uri_id, 'url' => $url, 'mimetype' => $mime], Database::INSERT_IGNORE);
  58                         $id = DBA::lastInsertId();
  59                         Logger::info('Inserted', ['id' => $id, 'uri-id' => $uri_id, 'url' => $url]);
  60                 }
  61
  62                 if (empty($id)) {
  63                         return $url;
  64                 }
  65
  66                 $url = DI::baseUrl() . '/photo/link/';
  67                 switch ($size) {
  68                         case Proxy::SIZE_MICRO:
  69                                 $url .= Proxy::PIXEL_MICRO . '/';
  70                                 break;
  71                         case Proxy::SIZE_THUMB:
  72                                 $url .= Proxy::PIXEL_THUMB . '/';
  73                                 break;
  74                         case Proxy::SIZE_SMALL:
  75                                 $url .= Proxy::PIXEL_SMALL . '/';
  76                                 break;
  77                         case Proxy::SIZE_MEDIUM:
  78                                 $url .= Proxy::PIXEL_MEDIUM . '/';
  79                                 break;
  80                         case Proxy::SIZE_LARGE:
  81                                 $url .= Proxy::PIXEL_LARGE . '/';
  82                                 break;
  83                 }
  84                 return $url . $id;
  85         }
  86
  87         private static function fetchMimeType(string $url)
  88         {
  89                 $timeout = DI::config()->get('system', 'xrd_timeout');
  90
  91                 $curlResult = DI::httpClient()->head($url, [HTTPClientOptions::TIMEOUT => $timeout]);
  92                 if ($curlResult->isSuccess()) {
  93                         if (empty($media['mimetype'])) {
  94                                 return $curlResult->getHeader('Content-Type')[0] ?? '';
  95                         }
  96                 }
  97                 return '';
  98         }
  99
 100         /**
 101          * Add external links and replace them in the body
 102          *
 103          * @param integer $uriid
 104          * @param string $body
 105          * @return string Body with replaced links
 106          */
 107         public static function insertFromBody(int $uriid, string $body)
 108         {
 109                 if (preg_match_all("/\[img\=([0-9]*)x([0-9]*)\](http.*?)\[\/img\]/ism", $body, $pictures, PREG_SET_ORDER)) {
 110                         foreach ($pictures as $picture) {
 111                                 $body = str_replace($picture[3], self::getByLink($uriid, $picture[3]), $body);
 112                         }
 113                 }
 114
 115                 if (preg_match_all("/\[img=(http[^\[\]]*)\]([^\[\]]*)\[\/img\]/Usi", $body, $pictures, PREG_SET_ORDER)) {
 116                         foreach ($pictures as $picture) {
 117                                 $body = str_replace($picture[1], self::getByLink($uriid, $picture[1]), $body);
 118                         }
 119                 }
 120
 121                 if (preg_match_all("/\[img\](http[^\[\]]*)\[\/img\]/ism", $body, $pictures, PREG_SET_ORDER)) {
 122                         foreach ($pictures as $picture) {
 123                                 $body = str_replace($picture[1], self::getByLink($uriid, $picture[1]), $body);
 124                         }
 125                 }
 126
 127                 return trim($body);
 128         }
 129 }