public static IList <SongRandomizerResult> GetRandomSongs(int count, PlaylistManager playlistManager, HashSet <string> playlistSubset = null)
{
// Get total number of songs from all selected playlists
var numSongs = 0;
var playlistsUnfiltered = playlistManager.GetAvailablePlaylists();
var playlists = new List <PlaylistInfo>();
foreach (var playlist in playlistsUnfiltered)
{
if (playlistSubset != null && !playlistSubset.Contains(playlist.Id))
{
continue;
}
playlists.Add(playlist);
numSongs += playlist.SongCount;
}
var randomSongs = new List <SongRandomizerResult>();
for (var i = 0; i < count; i++)
{
// Draw random song number
var songIndex = Random.Next(0, numSongs);
// Find the randomized song
var infoOpt = FindSong(songIndex, playlists);
if (!infoOpt.Ok)
{
throw new CommandException("SongRandomizer: Could not find the song at index " + songIndex + ".", CommandExceptionReason.InternalError);
}
var(list, index) = infoOpt.Value;
var(playlist, _) = playlistManager.GetPlaylist(list.Id).UnwrapThrow();
if (playlist.Count != list.SongCount)
{
Log.Warn("SongRandomizer: Playlist '{0}' is possibly corrupted!", list.Id);
}
var result = new SongRandomizerResult(list.Id, index, playlist[index]);
if (randomSongs.Contains(result) && numSongs > count)
{
Log.Trace("SongRandomizer: Ignored duplicate song.");
i--;
}
else
{
randomSongs.Add(result);
}
}
return(randomSongs);
}
protected bool Equals(SongRandomizerResult other)
{
return(PlaylistId == other.PlaylistId && IndexInPlaylist == other.IndexInPlaylist);
}