public static SPlaylistData GetPlaylist(int playlistId)
{
if (CPlaylists.Get(playlistId) == null)
{
throw new ArgumentException("invalid playlistId");
}
return(_GetPlaylistInfo(CPlaylists.Get(playlistId)));
}
public static void RemovePlaylist(int playlistId)
{
if (CPlaylists.Get(playlistId) == null)
{
throw new ArgumentException("invalid playlistId");
}
CPlaylists.Delete(playlistId);
}
public static bool PlaylistContainsSong(int songId, int playlistId)
{
CPlaylistFile pl = CPlaylists.Get(playlistId);
if (pl == null)
{
throw new ArgumentException("invalid playlistId");
}
return(pl.Songs.Any(s => s.SongID == songId));
}
public static SPlaylistSongInfo[] GetPlaylistSongs(int playlistId)
{
CPlaylistFile pl = CPlaylists.Get(playlistId);
if (pl == null)
{
throw new ArgumentException("invalid playlistId");
}
return(_GetPlaylistSongInfos(pl));
}
public static void AddSongToPlaylist(int songId, int playlistId, bool allowDuplicates)
{
if (CPlaylists.Get(playlistId) == null)
{
throw new ArgumentException("invalid playlistId");
}
if (allowDuplicates || !PlaylistContainsSong(songId, playlistId))
{
CPlaylists.AddSong(playlistId, songId);
CPlaylists.Save(playlistId);
}
else
{
throw new ArgumentException("song exists in this playlist");
}
}
public static void RemoveSongFromPlaylist(int position, int playlistId, int songId)
{
CPlaylistFile pl = CPlaylists.Get(playlistId);
if (pl == null)
{
throw new ArgumentException("invalid playlistId");
}
if (!PlaylistContainsSong(songId, playlistId))
{
throw new ArgumentException("invalid songId");
}
if (position < 0 || pl.Songs.Count <= position ||
pl.Songs[position].SongID != songId)
{
throw new ArgumentException("invalid position");
}
pl.DeleteSong(position);
pl.Save();
}
public static void MoveSongInPlaylist(int newPosition, int playlistId, int songId)
{
CPlaylistFile pl = CPlaylists.Get(playlistId);
if (pl == null)
{
throw new ArgumentException("invalid playlistId");
}
if (!PlaylistContainsSong(songId, playlistId))
{
throw new ArgumentException("invalid songId");
}
if (pl.Songs.Count < newPosition)
{
throw new ArgumentException("invalid newPosition");
}
int oldPosition = pl.Songs.FindIndex(s => s.SongID == songId);
pl.MoveSong(oldPosition, newPosition);
pl.Save();
}
