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<?php
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/**
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* @file
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* Extends the MediaInternetBaseHandler class to handle YouTube videos.
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*/
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/**
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* Implementation of MediaInternetBaseHandler.
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*
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* @see hook_media_internet_providers().
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*/
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class MediaInternetYouTubeHandler extends MediaInternetBaseHandler {
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public function parse($embedCode) {
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// http://youtube.com/watch/*
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// http://youtube.com/embed/*
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// http://youtube.com/v/*
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// http://youtube.com/?v=*
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// http://youtu.be/*
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// http://gdata.youtube.com/feeds/api/videos/*
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$patterns = array(
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'@youtube\.com/watch[#\?].*?v=([^"\& ]+)@i',
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'@youtube\.com/embed/([^"\&\? ]+)@i',
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'@youtube\.com/v/([^"\&\? ]+)@i',
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'@youtube\.com/\?v=([^"\& ]+)@i',
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'@youtu\.be/([^"\&\? ]+)@i',
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'@gdata\.youtube\.com/feeds/api/videos/([^"\&\? ]+)@i',
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);
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foreach ($patterns as $pattern) {
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preg_match($pattern, $embedCode, $matches);
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// @TODO: Parse is called often. Refactor so that valid ID is checked
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// when a video is added, but not every time the embedCode is parsed.
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if (isset($matches[1]) && self::validId($matches[1])) {
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return file_stream_wrapper_uri_normalize('youtube://v/' . $matches[1]);
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}
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}
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}
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public function claim($embedCode) {
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if ($this->parse($embedCode)) {
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return TRUE;
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}
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}
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public function getFileObject() {
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$uri = $this->parse($this->embedCode);
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$file = file_uri_to_object($uri, TRUE);
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// Try to default the file name to the video's title.
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if (empty($file->fid) && $info = $this->getOEmbed()) {
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$file->filename = truncate_utf8($info['title'], 255);
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}
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return $file;
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}
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/**
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* Returns information about the media.
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*
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* See http://www.oembed.com.
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*
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* @return
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* If oEmbed information is available, an array containing 'title', 'type',
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* 'url', and other information as specified by the oEmbed standard.
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* Otherwise, NULL.
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*/
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public function getOEmbed() {
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$uri = $this->parse($this->embedCode);
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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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return drupal_json_decode($response->data);
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}
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else {
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throw new Exception("Error Processing Request. (Error: {$response->code}, {$response->error})");
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return;
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}
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}
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/**
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* Check if a YouTube video ID is valid.
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*
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* @return boolean
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* TRUE if the video ID is valid, or throws a
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* MediaInternetValidationException otherwise.
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*/
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static public function validId($id) {
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$uri = file_stream_wrapper_uri_normalize('youtube://v/' . check_plain($id));
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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($oembed_url, array('method' => 'HEAD'));
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if ($response->code == 401) {
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throw new MediaInternetValidationException('Embedding has been disabled for this YouTube video.');
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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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return TRUE;
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}
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}
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