/// <summary>
/// Given a trackID, gets its audio features then passes that
/// to the Machine Learning Web Service
/// </summary>
/// <param name="id"></param>
/// <returns></returns>
public async Task <JsonResult> GetPrediction(string id)
{
Task <JObject> audioFeatures = SpotifyAPIs.GetSpotifyAudioFeaturesAsync(id);
Task <int> trackYear = SpotifyAPIs.GetTrackReleaseYear(id);
await Task.WhenAll(audioFeatures, trackYear);
string response;
if (audioFeatures.Result != null && trackYear.Result != 0)
{
var scoreRequest = PredictionRequest.CreateRequest(audioFeatures.Result, trackYear.Result);
response = await CallMlService(scoreRequest);
}
else
{
response = "Try again: Spotify Web APIs returned an error";
}
return(Json(response, JsonRequestBehavior.AllowGet));
}
public override ViewResult Index()
{
SpotifyAPIs.GetSpotifyAccessToken(); //loads access token into runtime cache
return(View("Index", "_Layout"));
}
