/// <summary>
/// Component Initialized
/// </summary>
protected override async Task OnInitializedAsync()
{
try
{
var cursorPage = await SpotifyService.GetArtists(AuthenticationService.AuthenticationToken);
Artists.AddRange(cursorPage.Items);
while (cursorPage != null && cursorPage.Next != null)
{
cursorPage = await SpotifyService.GetArtists(AuthenticationService.AuthenticationToken, cursorPage);
Artists.AddRange(cursorPage.Items);
StateHasChanged();
}
await BindPlaylist();
}
catch (Exception ex)
{
this.PageException = ex;
}
Loaded = true;
StateHasChanged();
}
public async Task <IEnumerable <Place> > GetRecommendedEstablishmentsForPlaylist(string playlistId, double lat, double lon, double distance)
{
string userId = HttpContext.User.Identity.Name;
var client = new HttpClient();
//Get his spotify token
var user = await _userService.GetUser(userId);
var token = user.CurrentToken;
//Get playlist songs from spotify
var songs = await _spotify.GetSongsFromPlaylist(client, token, playlistId);
//Match with storedSongs in Db for tags
var lastFmTagOccurrence = new ConcurrentDictionary <string, int>();
var spotifyGenreOccurrence = new ConcurrentDictionary <string, int>();
var artistsChecked = new ConcurrentDictionary <string, List <string> >();
//Call lastFm for the rest, if empty save with flag to not ask for it
Parallel.ForEach(songs.Items, async(song) =>
{
var lastFmTags = await _lastFm.GetTrackTags(client, song.Track.Name, song.Track.Artists[0]?.Name);
lastFmTags.Toptags.Tag.Sort(new TagComparer());
lastFmTags.Toptags.Tag.Take(5).ToList().ForEach(t =>
{
lastFmTagOccurrence.AddOrUpdate(t.Name, 1, (k, i) => i++);
});
var artists = song.Track.Artists.Select(a => a.Id)
.Where(a => !artistsChecked.ContainsKey(a));
artists.ToList().ForEach(a => artistsChecked.AddOrUpdate(a, new List <string>(), (k, l) => new List <string>()));
var stringArtists = artists.Aggregate((a, b) => a + "," + b);
var spotifyTags = await _spotify.GetArtists(client, token, stringArtists);
spotifyTags.ForEach(a =>
{
artistsChecked.AddOrUpdate(a.Id, a.Genres.ToList(), (k, l) => a.Genres.ToList());
a.Genres.ToList().ForEach(g =>
{
// Add Genre occurrence
spotifyGenreOccurrence.AddOrUpdate(g, 1, (k, l) => l++);
});
});
});
//Update tags
//Algorithm magic (Get every place surrounding that, apply the algorithm for those)
//With today's playlist
var places = _placesService.GetPlaces(0, 25, new Geolocation {
Latitude = lat, Longitude = lon
}, distance, true);
throw new NotImplementedException();
}
