public async Task RemoveSong(PlayingSong song)
{
if (!this.Dispatcher.HasThreadAccess)
{
var completionSource = new TaskCompletionSource <object>();
await this.Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, async() =>
{
await this.RemoveSong(song);
completionSource.SetResult(null);
});
await completionSource.Task;
}
else
{
using (await this.semaphore.Lock())
{
this.mediaPlaybackList.Items.Remove(song.MediaPlaybackItem);
this.playbackItemLookup.Remove(song.MediaPlaybackItem);
var list = this.mediaItemLookup[song.Song];
this.currentPlaylist.Remove(song);
list.Remove(song);
if (list.Count == 0)
{
this.mediaItemLookup.Remove(song.Song);
}
}
}
}
private async Task <PlayingSong> AddSongInternal(Song song)
{
Task getCover;
MediaSource media;
List <PlayingSong> list;
MediaItemDisplayProperties oldProperties = null;
if (this.mediaItemLookup.ContainsKey(song))
{
list = this.mediaItemLookup[song];
var oldMedia = list.FirstOrDefault()?.MediaPlaybackItem;
media = oldMedia?.Source;
if (media is null) // Async could add list before mediasource is added.
{
media = await LibraryRegistry <MediaSource, Uri> .Get(song.LibraryProvider).GetMediaSource(song.MediaId, default);
}
else
{
oldProperties = oldMedia.GetDisplayProperties();
}
}
else
{
list = new List <PlayingSong>();
this.mediaItemLookup.Add(song, list);
media = await LibraryRegistry <MediaSource, Uri> .Get(song.LibraryProvider).GetMediaSource(song.MediaId, default);
}
if (media is null)
{
return(null);
}
var mediaItem = new MediaPlaybackItem(media);
var viewModel = new PlayingSong(mediaItem, song);
this.playbackItemLookup.Add(mediaItem, viewModel);
list.Add(viewModel);
if (oldProperties is null)
{
var displayProperties = mediaItem.GetDisplayProperties();
displayProperties.Type = Windows.Media.MediaPlaybackType.Music;
displayProperties.MusicProperties.AlbumTitle = song.AlbumName;
displayProperties.MusicProperties.TrackNumber = (uint)song.Track;
displayProperties.MusicProperties.Title = song.Title;
displayProperties.MusicProperties.Genres.Clear();
foreach (var genre in song.Genres)
{
displayProperties.MusicProperties.Genres.Add(genre);
}
displayProperties.MusicProperties.Artist = string.Join(", ", song.Interpreters);
mediaItem.ApplyDisplayProperties(displayProperties);
var coverTask = song.GetCover(300, default);
getCover = coverTask.ContinueWith(t =>
{
var coverStreamReferance = t.Result;
displayProperties.Thumbnail = coverStreamReferance;
mediaItem.ApplyDisplayProperties(displayProperties);
});
}
else
{
getCover = null;
}
this.mediaPlaybackList.Items.Add(mediaItem);
int indexAdded;
if (this.mediaPlaybackList.ShuffleEnabled)
{
indexAdded = this.mediaPlaybackList.ShuffledItems.Select((value, index) => (value, index)).First(x => x.value == mediaItem).index;
}
else
{
indexAdded = this.mediaPlaybackList.Items.Count - 1;
}
this.currentPlaylist.Insert(indexAdded, viewModel);
if (getCover != null)
{
await getCover;
}
return(viewModel);
}