public async Task DeleteFromPlaylistAsync(Playlist playlist, PlaylistSong songToRemove)
{
if (songToRemove.NextId != 0)
{
var nextSong = playlist.LookupMap[songToRemove.NextId];
nextSong.PrevId = songToRemove.PrevId;
await _sqlService.UpdateItemAsync(nextSong);
}
if (songToRemove.PrevId != 0)
{
var prevSong = playlist.LookupMap[songToRemove.PrevId];
prevSong.NextId = songToRemove.NextId;
await _sqlService.UpdateItemAsync(prevSong);
}
await _sqlService.DeleteItemAsync(songToRemove);
await _dispatcher.RunAsync(() => playlist.Songs.Remove(songToRemove));
}
public async Task AddToPlaylistAsync(Playlist playlist, Song song)
{
var tail = playlist.Songs.LastOrDefault();
// Create the new queue entry
var newSong = new PlaylistSong
{
SongId = song.Id,
NextId = 0,
PrevId = tail == null ? 0 : tail.Id,
Song = song,
PlaylistId = playlist.Id
};
// Add it to the database
await _sqlService.InsertAsync(newSong);
if (tail != null)
{
// Update the next id of the previous tail
tail.NextId = newSong.Id;
await _sqlService.UpdateItemAsync(tail);
}
// Add the new queue entry to the collection and map
playlist.Songs.Add(newSong);
playlist.LookupMap.TryAdd(newSong.Id, newSong);
}
public Task DeleteFromPlaylistAsync(Playlist playlist, PlaylistSong songToRemove)
{
throw new NotImplementedException();
}
