private async Task <IEnumerable <LastArtist> > LoadTopArtists()
{
if (TopArtistsLF.Any())
{
return(new List <LastArtist>());
}
int itemsPerPage = 8;
#if WINDOWS_UWP
itemsPerPage = 11;
#endif
var response = await _lfClient.Chart.GetTopArtistsAsync(itemsPerPage : itemsPerPage);
if (response.Success)
{
#if WINDOWS_UWP
var artists = new List <LastArtist>(response.Content);
artists.Add(new LastArtist
{
Name = VKSAVER_SEE_ALSO_TEXT
});
return(artists);
#else
TryLoadTopArtistBackground(response.First());
return(response);
#endif
}
else
{
throw new Exception("LFChartArtistsResponse isn't valid.");
}
}
public override async void OnNavigatedTo(NavigatedToEventArgs e, Dictionary <string, object> viewModelState)
{
_backgroundLoaded = false;
if (viewModelState.Count > 0)
{
#if !WINDOWS_UWP
FirstTrack = JsonConvert.DeserializeObject <VKAudioWithImage>(
viewModelState[nameof(FirstTrack)].ToString());
#endif
UserTracks = JsonConvert.DeserializeObject <SimpleStateSupportCollection <Audio> >(
viewModelState[nameof(UserTracks)].ToString());
TopArtistsLF = JsonConvert.DeserializeObject <SimpleStateSupportCollection <LastArtist> >(
viewModelState[nameof(TopArtistsLF)].ToString(), _lastImageSetConverter);
RecommendedTracksVK = JsonConvert.DeserializeObject <SimpleStateSupportCollection <Audio> >(
viewModelState[nameof(RecommendedTracksVK)].ToString());
UserTracks.LoadItems = LoadUserTracks;
TopArtistsLF.LoadItems = LoadTopArtists;
RecommendedTracksVK.LoadItems = LoadRecommendedTracks;
}
else
{
UserTracks = new SimpleStateSupportCollection <Audio>(LoadUserTracks);
TopArtistsLF = new SimpleStateSupportCollection <LastArtist>(LoadTopArtists);
RecommendedTracksVK = new SimpleStateSupportCollection <Audio>(LoadRecommendedTracks);
}
UserTracks.Load();
TopArtistsLF.Load();
RecommendedTracksVK.Load();
#if !WINDOWS_UWP
TryLoadBackground(FirstTrack);
#endif
base.OnNavigatedTo(e, viewModelState);
await Task.Delay(2000);
_adsService.ActivateAds();
}
public override void OnNavigatingFrom(NavigatingFromEventArgs e, Dictionary <string, object> viewModelState, bool suspending)
{
if (e.NavigationMode == NavigationMode.New)
{
#if !WINDOWS_UWP
viewModelState[nameof(FirstTrack)] = JsonConvert.SerializeObject(FirstTrack);
#endif
viewModelState[nameof(UserTracks)] = JsonConvert.SerializeObject(UserTracks.ToList());
viewModelState[nameof(TopArtistsLF)] = JsonConvert.SerializeObject(TopArtistsLF.ToList(), _lastImageSetConverter);
viewModelState[nameof(RecommendedTracksVK)] = JsonConvert.SerializeObject(RecommendedTracksVK.ToList());
}
base.OnNavigatingFrom(e, viewModelState, suspending);
}
