typo3/sysext/core/Classes/Resource/OnlineMedia/Helpers/YouTubeHelper.php

   1 <?php
   2 namespace TYPO3\CMS\Core\Resource\OnlineMedia\Helpers;
   3
   4 /*
   5  * This file is part of the TYPO3 CMS project.
   6  *
   7  * It is free software; you can redistribute it and/or modify it under
   8  * the terms of the GNU General Public License, either version 2
   9  * of the License, or any later version.
  10  *
  11  * For the full copyright and license information, please read the
  12  * LICENSE.txt file that was distributed with this source code.
  13  *
  14  * The TYPO3 project - inspiring people to share!
  15  */
  16
  17 use TYPO3\CMS\Core\Resource\File;
  18 use TYPO3\CMS\Core\Resource\Folder;
  19 use TYPO3\CMS\Core\Utility\GeneralUtility;
  20
  21 /**
  22  * SlideShare helper class
  23  */
  24 class YouTubeHelper extends AbstractOEmbedHelper
  25 {
  26     /**
  27      * Get public url
  28      *
  29      * @param File $file
  30      * @param bool $relativeToCurrentScript
  31      * @return string|null
  32      */
  33     public function getPublicUrl(File $file, $relativeToCurrentScript = false)
  34     {
  35         $videoId = $this->getOnlineMediaId($file);
  36         return sprintf('https://www.youtube.com/watch?v=%s', $videoId);
  37     }
  38
  39     /**
  40      * Get local absolute file path to preview image
  41      *
  42      * @param File $file
  43      * @return string
  44      */
  45     public function getPreviewImage(File $file)
  46     {
  47         $videoId = $this->getOnlineMediaId($file);
  48         $temporaryFileName = $this->getTempFolderPath() . 'youtube_' . md5($videoId) . '.jpg';
  49
  50         if (!file_exists($temporaryFileName)) {
  51             $tryNames = ['maxresdefault.jpg', '0.jpg'];
  52             foreach ($tryNames as $tryName) {
  53                 $previewImage = GeneralUtility::getUrl(
  54                     sprintf('https://img.youtube.com/vi/%s/%s', $videoId, $tryName)
  55                 );
  56                 if ($previewImage !== false) {
  57                     file_put_contents($temporaryFileName, $previewImage);
  58                     GeneralUtility::fixPermissions($temporaryFileName);
  59                     break;
  60                 }
  61             }
  62         }
  63
  64         return $temporaryFileName;
  65     }
  66
  67     /**
  68      * Try to transform given URL to a File
  69      *
  70      * @param string $url
  71      * @param Folder $targetFolder
  72      * @return File|null
  73      */
  74     public function transformUrlToFile($url, Folder $targetFolder)
  75     {
  76         $videoId = null;
  77         // Try to get the YouTube code from given url.
  78         // These formats are supported with and without http(s)://
  79         // - youtu.be/<code> # Share URL
  80         // - www.youtube.com/watch?v=<code> # Normal web link
  81         // - www.youtube.com/v/<code>
  82         // - www.youtube-nocookie.com/v/<code> # youtube-nocookie.com web link
  83         // - www.youtube.com/embed/<code> # URL form iframe embed code, can also get code from full iframe snippet
  84         if (preg_match('%(?:youtube(?:-nocookie)?\.com/(?:[^/]+/.+/|(?:v|e(?:mbed)?)/|.*[?&]v=)|youtu\.be/)([^"&?/ ]{11})%i', $url, $match)) {
  85             $videoId = $match[1];
  86         }
  87         if (empty($videoId)) {
  88             return null;
  89         }
  90         return $this->transformMediaIdToFile($videoId, $targetFolder, $this->extension);
  91     }
  92
  93     /**
  94      * Get oEmbed url to retrieve oEmbed data
  95      *
  96      * @param string $mediaId
  97      * @param string $format
  98      * @return string
  99      */
 100     protected function getOEmbedUrl($mediaId, $format = 'json')
 101     {
 102         return sprintf(
 103             'https://www.youtube.com/oembed?url=%s&format=%s',
 104             urlencode(sprintf('https://www.youtube.com/watch?v=%s', $mediaId)),
 105             rawurlencode($format)
 106         );
 107     }
 108 }