public async Task SyncTracksAsync(PlaylistGenerationContext context)
{
FullTrack[] toDelete = context.TargetTracks
.Where(t => !context.SourceTracks.Any(s => s.Id == t.Id))
.ToArray();
FullTrack[] toAdd = context.SourceTracks
.Where(s => !context.TargetTracks.Any(t => t.Id == s.Id))
.ToArray();
foreach (IEnumerable <FullTrack> batch in toDelete.Batch(100))
{
PlaylistRemoveItemsRequest req = new PlaylistRemoveItemsRequest
{
Tracks = batch.Select(o => new PlaylistRemoveItemsRequest.Item {
Uri = o.Uri
}).ToList()
};
SnapshotResponse res = await context.Client.Playlists.RemoveItems(context.TargetPlaylist.Id, req);
}
foreach (IEnumerable <FullTrack> batch in toAdd.Batch(100))
{
SnapshotResponse res = await context.Client.Playlists.AddItems(context.TargetPlaylist.Id, new PlaylistAddItemsRequest(batch.Select(o => o.Uri).ToList()));
}
context.TargetTracks = context.TargetTracks
.Except(toDelete)
.Concat(toAdd)
.ToList();
}
public async Task ExecuteGenerationAsync(PlaylistDefinition playlistDefinition)
{
PlaylistGenerationContext context = await _generationContextBuilder.CreateContextAsync(playlistDefinition);
await _syncWorker.SyncTracksAsync(context);
await _syncWorker.SyncSortingAsync(context);
}
public async Task SyncSortingAsync(PlaylistGenerationContext context)
{
for (int i = 0; i < context.SourceTracks.Count; i++)
{
FullTrack track = context.SourceTracks[i];
int curIndex = context.TargetTracks.FindIndex(o => o.Id == track.Id);
if (curIndex != i)
{
await context.Client.Playlists.ReorderItems(context.TargetPlaylist.Id, new PlaylistReorderItemsRequest(curIndex, i));
context.TargetTracks = context.TargetTracks.Move(curIndex, 1, i).ToList();
}
}
}
