public async Task <TracksSource> Source(string tempo, string genres, [FromServices] ITracksSourcesRepository sourcesRepository)
{
TracksSource src = await sourcesRepository.GetRandomTracksSource(new TracksCriteria(tempo, genres));
return(src == null ? new TracksSource {
Id = -10000
} : src);
}
public async Task <List <Track> > GrabAndSaveTracks(TracksCriteria criteria)
{
TracksSource tracksSource = await _tracksSourceRepository.GetRandomTracksSource(criteria);
List <Track> tracks = await _grabber.GrabRandomTracks(tracksSource);
await _tracksRepository.SaveTracks(tracks);
return(tracks);
}
public Task <List <Track> > GrabRandomTracks(TracksSource tracksSource)
{
switch (tracksSource.SourceType)
{
case TracksSourceType.YandexTracks:
return(GrabTracksFromList(tracksSource.Value));
default:
throw new NotSupportedException($"Source {tracksSource.SourceType.ToString()} is not supported by YandexTracksGrabber.");
}
}
public async Task <List <Track> > GrabRandomTracks(TracksSource tracksSource)
{
SemaphoreSlim semaphore = _semaphores.GetSemaphoreForService(tracksSource.Service);
await semaphore.WaitAsync();
try {
IServiceTracksGrabber grabber = _grabbersProvider(tracksSource.Service);
DateTime expirationDatetime = DateTime.Now.Add(grabber.LinkLifeTime);
List <Track> tracks = await grabber.GrabRandomTracks(tracksSource);
foreach (var track in tracks)
{
track.TracksSource = tracksSource;
track.ExpirationDatetime = expirationDatetime;
}
return(tracks);
} finally {
semaphore.Release();
}
}