protected override async Task OnPlaylistChanged(CancellationToken cancellationToken)
{
var playlistData = new PlaylistData(Songs, CurrentSongIndex);
await sessionDataService.SaveData(PlaylistDataKey, playlistData, cancellationToken);
await base.OnPlaylistChanged(cancellationToken);
}
private async Task <(IReadOnlyCollection <SongModel> Songs, int?CurrentSongIndex)> LoadPlaylistSongs(PlaylistData playListData, CancellationToken cancellationToken)
{
var songIds = playListData.Songs
.Select(s => s.Id)
.Select(id => new ItemId(id))
.Distinct();
var loadedSongs = (await songsService.GetSongs(songIds, cancellationToken))
.ToDictionary(s => s.Id, s => s);
var newSongIndex = playListData.CurrentSongIndex;
var playListSongs = new List <SongModel>();
foreach (var(playlistSong, songIndex) in playListData.Songs.Select((song, i) => (song, i)))
{
if (!loadedSongs.TryGetValue(new ItemId(playlistSong.Id), out var loadedSong))
{
logger.LogWarning($"Song {playlistSong.Id} from saved playlist was not found in library. Ignoring saved playlist.");
return(null, null);
}
if (loadedSong.IsDeleted)
{
logger.LogWarning($"Song '{GetSongTitle(loadedSong)}' from saved playlist was deleted from the library. Ignoring this song.");
if (songIndex < newSongIndex)
{
--newSongIndex;
}
continue;
}
playListSongs.Add(loadedSong);
}
if (newSongIndex != null && (newSongIndex < 0 || newSongIndex >= playListSongs.Count))
{
logger.LogWarning($"Index of current song in saved playlist is invalid ({newSongIndex}, [0, {playListSongs.Count})). Ignoring saved playlist.");
return(null, null);
}
return(playListSongs, newSongIndex);
}
