/// <summary>
/// Adds some tracks to an iTunes playlist.
/// </summary>
/// <param name="playlist">The playlist to modify</param>
/// <param name="playlistLines">The tracks to add to iTunes as represented by their device location.</param>
/// <param name="searchHint">
/// A playlist folder to look in. This will reduce the search time.
/// This only works under the assumption that all music that can possibly be on the device are under this folder.
/// Use "Music" to search all songs.
/// </param>
/// <param name="root">The root device path used to generate device location. This should be the same root used to generate "playlistLines"</param>
/// <returns>An enumeration of all songs that were successfully added to the playlist.</returns>
public IEnumerable<string> AddTracks(IPlaylist playlist, IEnumerable<string> playlistLines, ISubscription subscription, string root)
{
List<string> addedTracks = new List<string>();
IITUserPlaylist targetPlaylist = playlistLookupTable[playlist.GetSafeName()] as IITUserPlaylist;
if (targetPlaylist == null) return addedTracks;
var subscribedTracks = GetSubscribedTracks(subscription);
foreach (var line in playlistLines)
{
foreach (var iTrack in subscribedTracks)
{
if (line != iTrack.GetPlaylistLine(root)) continue;
targetPlaylist.AddTrack(iTrack);
addedTracks.Add(line);
break;
}
}
return addedTracks;
}
/// <summary>
/// Remove some tracks from an iTunes playlist.
/// </summary>
/// <param name="playlist">The playlist to modify</param>
/// <param name="tracks">The tracks to remove from playlist.</param>
/// <returns>An enumeration of tracks that were successfully removed from playlist.</returns>
public IEnumerable<ITrack> RemoveTracks(IPlaylist playlist, IEnumerable<ITrack> tracks)
{
List<ITrack> removedtracks = new List<ITrack>();
IITPlaylist pls = playlistLookupTable[playlist.GetSafeName()];
foreach (IITTrack iTunesTrack in pls.Tracks)
{
if (!(iTunesTrack is IITFileOrCDTrack)) continue;
IITFileOrCDTrack _item = (IITFileOrCDTrack)iTunesTrack;
foreach (var track in tracks.Where(track => track.Location == _item.Location))
{
removedtracks.Add(track);
iTunesTrack.Delete();
break;
}
}
return removedtracks;
}