Playlist Support

Hi there,

Just been working with your code, and I needed to support loading a Playlist via the YouTube API (http://code.google.com/apis/youtube/2.0/reference.html#Playlist_feed)

It pretty much works out of the box, except for the ID of a video, which is buried down a couple more nodes.

Normally a video ID can be found at root->entry->id, which spits out a URL to the API call for a video (ex http://gdata.youtube.com/feeds/api/videos/ww_zIiLhWpA) which the module splits up into an array and grabs the last piece (ex. ww_zIiLhWpA)

For playlists though, it's located a bit further down: root->entry->group->videoid

To differentiate between reading a playlist feed vs. reading a normal search feed, we can look at the root->category field's "term" attribute:

http://gdata.youtube.com/schemas/2007#video
http://gdata.youtube.com/schemas/2007#playlist

Parse that, and then we can decide how to search for the ID.

I did it like this...

  private function parseAtom(SimpleXMLElement $sxml, FeedsImportBatch $batch, FeedsSource $source) {

    $batch->title = $feed_title = (string) $sxml->title;

	// Detect whether we're dealing with a playlist or just a list of videos from a search
	$category = $sxml->category->attributes();
	$category = explode('#',$category['term']);
	$playlist = $category[1] == "playlist" ? true : false;

    // Iterate over entries in feed
    // TODO: This is not DRY - extract things which is same in Atom and RSS20 to common method
    foreach ($sxml->entry as $entry) {
      // get video ID
      $arr = explode('/', $entry->id);
      $id = $arr[count($arr)-1];

      // get nodes in media: namespace for media information
      $media = $entry->children('http://search.yahoo.com/mrss/');

      // Check if we're dealing with a playlist, and redefine $id
      if ($playlist) {
        $yt = $media->children('http://gdata.youtube.com/schemas/2007');
        $id = (string)$yt->videoid;
      }
...

If you do something like that, the module will be able to support not just video search feeds but playlist feeds as well.