Playlist aggregator

Asset.m

-(NSArray *)playlistsInFolder:(SPPlaylistFolder *)aFolder {
	
	NSMutableArray *playlists = [NSMutableArray arrayWithCapacity:[[aFolder playlists] count]];
	
	for (id playlistOrFolder in aFolder.playlists) {
		if ([playlistOrFolder isKindOfClass:[SPPlaylist class]]) {
			[playlists addObject:playlistOrFolder];
		} else {
			[playlists addObjectsFromArray:[self playlistsInFolder:playlistOrFolder]];
		}
	}
	return [NSArray arrayWithArray:playlists];
}