/// <summary>
/// Async searching of similar tracks on spotify via default track model.
/// </summary>
/// <param name="tracks">Tracks models</param>
/// <param name="ct">Cancellation token.</param>
/// <param name="progress">Callback to inform about current progress.</param>
/// <returns>Dictionary of default models and spotify tracks.</returns>
public async Task <IEnumerable <SpotifyTrack> > FindTracksPairsAsync(IEnumerable <TIn> tracks,
CancellationToken ct, Action <float> progress = null)
{
Guarantee.IsEnumerableNotNullOrEmpty(tracks, nameof(tracks));
var songPairs = new List <SpotifyTrack>();
try
{
//to avoid enumeration if it isn't necessary
var tracksCount = progress == null ? 0 : tracks.Count();
var processed = 0;
foreach (var track in tracks)
{
ct.ThrowIfCancellationRequested();
SpotifyTrack spotifyTrack;
try
{
spotifyTrack = await FindTrackPairAsync(track, new CancellationToken());
}
catch (APITooManyRequestsException tooManyRequestsException)
{
await Task.Delay(tooManyRequestsException.RetryAfter + TimeSpan.FromSeconds(1), ct);
spotifyTrack = await FindTrackPairAsync(track, new CancellationToken());
}
if (spotifyTrack != null)
{
songPairs.Add(spotifyTrack);
}
progress?.Invoke(100f / tracksCount * ++processed);
}
return(songPairs);
}
catch
{
return(songPairs);
}
}
/// <summary>
/// Async saving of tracks into the library of user.
/// </summary>
/// <param name="spotifyTracks">Spotify tracks which is gonna be added.</param>
/// <param name="ct">Token to cancel.</param>
/// <returns></returns>
public async Task <bool> SaveTracksAsync(IEnumerable <SpotifyTrack> spotifyTracks, CancellationToken ct)
{
Guarantee.IsEnumerableNotNullOrEmpty(spotifyTracks, nameof(spotifyTracks));
foreach (var list in CommonUtils.SplitOnLists(spotifyTracks, 50))
{
ct.ThrowIfCancellationRequested();
try
{
return(await SaveTracks(list));
}
catch (APITooManyRequestsException tooManyRequestsException)
{
await Task.Delay(tooManyRequestsException.RetryAfter + TimeSpan.FromSeconds(1), ct);
return(await SaveTracks(list));
}
}
return(true);
}