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<?php
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/**
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* @file
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* Extends the MediaReadOnlyStreamWrapper class to handle YouTube videos.
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*/
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/**
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* Create an instance like this:
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* $youtube = new MediaYouTubeStreamWrapper('youtube://v/[video-code]');
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*/
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class MediaYouTubeStreamWrapper extends MediaReadOnlyStreamWrapper {
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protected $base_url = 'http://www.youtube.com/watch';
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static function getMimeType($uri, $mapping = NULL) {
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return 'video/youtube';
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}
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function getOriginalThumbnailPath() {
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$parts = $this->get_parameters();
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$thumbnail_url = 'http://img.youtube.com/vi/' . check_plain($parts['v']) . "/maxresdefault.jpg";
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$response = drupal_http_request($thumbnail_url);
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if (!isset($response->error)) {
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return $thumbnail_url;
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}
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elseif ($response->code == 401) {
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throw new MediaInternetValidationException("Embedding has been disabled for this video.");
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}
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elseif ($response->code == 404) {
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return "http://s.ytimg.com/yts/img/image-hh-404-vflvCykRp.png";
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}
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elseif ($response->code != 200) {
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throw new MediaInternetValidationException("The YouTube video ID is invalid or the video was deleted.");
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}
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else {
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$uri = file_stream_wrapper_uri_normalize('youtube://v/' . check_plain($parts['v']));
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$external_url = file_create_url($uri);
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$oembed_url = url('http://www.youtube.com/oembed', array('query' => array('url' => $external_url, 'format' => 'json')));
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$response = drupal_http_request($oembed_url);
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if (!isset($response->error)) {
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$data = drupal_json_decode($response->data);
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return $data['thumbnail_url'];
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}
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else {
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throw new Exception("Error Processing Request. (Error: {$response->code}, {$response->error})");
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return;
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}
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}
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}
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function getLocalThumbnailPath() {
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$parts = $this->get_parameters();
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$id = array_pop($parts);
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$local_path = file_default_scheme() . '://media-youtube/' . check_plain($id) . '.jpg';
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if (!file_exists($local_path)) {
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// getOriginalThumbnailPath throws an exception if there are any errors
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// when retrieving the original thumbnail from YouTube.
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try {
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$dirname = drupal_dirname($local_path);
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file_prepare_directory($dirname, FILE_CREATE_DIRECTORY | FILE_MODIFY_PERMISSIONS);
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$response = drupal_http_request($this->getOriginalThumbnailPath());
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if (!isset($response->error)) {
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file_unmanaged_save_data($response->data, $local_path, TRUE);
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}
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else {
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@copy($this->getOriginalThumbnailPath(), $local_path);
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}
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}
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catch (Exception $e) {
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// In the event of an endpoint error, use the mime type icon provided
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// by the Media module.
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$file = file_uri_to_object($this->uri);
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$icon_dir = variable_get('media_icon_base_directory', 'public://media-icons') . '/' . variable_get('media_icon_set', 'default');
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$local_path = file_icon_path($file, $icon_dir);
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}
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}
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return $local_path;
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}
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/**
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* Updates $base_url depending on whether the embed is a video or playlist.
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*/
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function setBaseUrl($parameters) {
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if (isset($parameters['l'])) {
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if (!isset($parameters['v'])) {
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$this->base_url = 'http://youtube.com/playlist';
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}
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$parameters['list'] = $parameters['l'];
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unset($parameters['l']);
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}
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return $parameters;
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}
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/**
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* Returns a url in the format "http://www.youtube.com/watch?v=qsPQN4MiTeE".
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*
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* Overrides interpolateUrl() defined in MediaReadOnlyStreamWrapper.
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*/
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function interpolateUrl() {
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if ($parameters = $this->get_parameters()) {
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$parameters = $this->setBaseUrl($parameters);
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return $this->base_url . '?' . http_build_query($parameters);
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}
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}
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}
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