mediatomb audio java script

An extension to my previous movie script for mediatomb. This script arranges the audio files in folders indexed by the first char in the artist, title...etc. So in addition to the normal directory structure, you will get sub-folders All, A, B, C, etc... This is useful if you have a large library of music and you are tired of too much scrolling.

function addAudio(obj)
{

  var desc = '';
  var artist_full;
  var album_full;

  // first gather data
  var title = obj.meta[M_TITLE];
  if (!title) title = obj.title;

  var artist = obj.meta[M_ARTIST];
  if (!artist)
  {
      artist = 'Unknown';
      artist_full = null;
  }
  else
  {
      artist_full = artist;
      desc = artist;
  }

  var album = obj.meta[M_ALBUM];
  if (!album)
  {
      album = 'Unknown';
      album_full = null;
  }
  else
  {
      desc = desc + ', ' + album;
      album_full = album;
  }

  if (desc)
      desc = desc + ', ';

  desc = desc + title;

  var date = obj.meta[M_DATE];
  if (!date)
  {
      date = 'Unknown';
  }
  else
  {
      date = getYear(date);
      desc = desc + ', ' + date;
  }

  var genre = obj.meta[M_GENRE];
  if (!genre)
  {
      genre = 'Unknown';
  }
  else
  {
      desc = desc + ', ' + genre;
  }

  var description = obj.meta[M_DESCRIPTION];
  if (!description)
  {
      obj.meta[M_DESCRIPTION] = desc;
  }

// uncomment this if you want to have track numbers in front of the title
// in album view

/*  
  var track = obj.meta[M_TRACKNUMBER];
  if (!track)
      track = '';
  else
  {
      if (track.length == 1)
      {
          track = '0' + track;
      }
      track = track + ' ';
  }
*/
  // comment the following line out if you uncomment the stuff above  :)
  var track = '';

  obj.title = title;

var tprefix = title.charAt(0).toUpperCase();
if(tprefix.search(/\W/) == 0){
 tprefix = "!";
}

var chain = new Array('Audio', 'All Audio', tprefix);
  addCdsObject(obj, createContainerChain(chain), UPNP_CLASS_CONTAINER_MUSIC);

var chain = new Array('Audio', 'All Audio', ' All');
  addCdsObject(obj, createContainerChain(chain), UPNP_CLASS_CONTAINER_MUSIC);




var aprefix = artist.charAt(0).toUpperCase();
if(aprefix.search(/\W/) == 0){
 aprefix = "!";
}

  chain = new Array('Audio', 'Artists', aprefix, artist, 'All Songs');
  addCdsObject(obj, createContainerChain(chain), UPNP_CLASS_CONTAINER_MUSIC);

chain = new Array('Audio', 'Artists', ' All', artist, 'All Songs');
  addCdsObject(obj, createContainerChain(chain), UPNP_CLASS_CONTAINER_MUSIC);





  var temp = '';
  if (artist_full)
      temp = artist_full;

  if (album_full)
      temp = temp + ' - ' + album_full + ' - ';

  obj.title = temp + title;

tprefix = obj.title.charAt(0).toUpperCase();
if(tprefix.search(/\W/) == 0){
 tprefix = "!";
}
chain = new Array('Audio', 'All - full name', tprefix);
  addCdsObject(obj, createContainerChain(chain), UPNP_CLASS_CONTAINER_MUSIC);

chain = new Array('Audio', 'All - full name', ' All');
  addCdsObject(obj, createContainerChain(chain), UPNP_CLASS_CONTAINER_MUSIC);

  chain = new Array('Audio', 'Artists', aprefix, artist, 'All - full name');
  addCdsObject(obj, createContainerChain(chain), UPNP_CLASS_CONTAINER_MUSIC);

chain = new Array('Audio', 'Artists', ' All', artist, 'All - full name');
  addCdsObject(obj, createContainerChain(chain), UPNP_CLASS_CONTAINER_MUSIC);


  obj.title = track + title;
chain = new Array('Audio', 'Artists', ' All', artist, album);
  addCdsObject(obj, createContainerChain(chain), UPNP_CLASS_CONTAINER_MUSIC_ALBUM);

chain = new Array('Audio', 'Artists', aprefix, artist, album);
  addCdsObject(obj, createContainerChain(chain), UPNP_CLASS_CONTAINER_MUSIC_ALBUM);


var aprefix = album.charAt(0).toUpperCase();
if(aprefix.search(/\W/) == 0){
 aprefix = "!";
}
chain = new Array('Audio', 'Albums', ' All', album);
  addCdsObject(obj, createContainerChain(chain), UPNP_CLASS_CONTAINER_MUSIC_ALBUM);

chain = new Array('Audio', 'Albums', aprefix, album);
  addCdsObject(obj, createContainerChain(chain), UPNP_CLASS_CONTAINER_MUSIC_ALBUM);



  chain = new Array('Audio', 'Genres', genre);
  addCdsObject(obj, createContainerChain(chain), UPNP_CLASS_CONTAINER_MUSIC_GENRE);

  chain = new Array('Audio', 'Year', date);
  addCdsObject(obj, createContainerChain(chain), UPNP_CLASS_CONTAINER_MUSIC);
}