public AudioListItemModel(VKAudio item)
{
Contract.Requires(item != null);
this.item = item;
uriLazy = new Lazy <Uri>(() => new Uri(item.Url));
durationLazy = new Lazy <TimeSpan>(() => TimeSpan.FromSeconds(item.Duration));
}
private async Task Restore()
{
VKAudio restored = await VKApi.Audio.RestoreAsync(Item.Audio.Id, Item.Audio.OwnerId);
if (restored != null)
{
Item.Audio.Url = restored.Url;
Item.Audio.Id = restored.Id;
Item.Audio.OwnerId = restored.OwnerId;
IsDeleted = false;
}
}
private async Task AddItemToList(VKAudio item)
{
var audioWrapper = new AudioListItemModel(item);
if (this.currentItem != null && this.currentItem.Item == audioWrapper)
{
await AddItem(this.currentItem);
}
else
{
var itemVM = ServiceLocator.Current.GetInstance <IAudioListItemViewModel>();
itemVM.Item = audioWrapper;
await AddItem(itemVM);
}
}
public LyricsViewModel(VKAudio audio)
{
Contract.Requires(audio != null);
this.audio = audio;
}
/// <summary>
/// Конструктор по умолчанию.
/// </summary>
public PlayerViewModel()
{
#if DEBUG
if (IsInDesignModeStatic)
{
CurrentTrack = new VKAudio {
Title = "Poker Face", Artist = "Lady Gaga", LyricsID = 1
};
DurationStart = TimeSpan.FromSeconds(0);
DurationEnd = TimeSpan.FromSeconds(123);
ArtistImage = new BitmapImage(new Uri("http://userserve-ak.last.fm/serve/500/60890169/Lady+Gaga+Gaga.png"));
return;
}
#endif
NextTrack = new RelayCommand(() =>
{
if (Tracks == null || Tracks.Count == 0)
{
return;
}
ServiceHelper.PlayerService.NextTrack();
Duration = TimeSpan.Zero;
DurationStart = TimeSpan.Zero;
DurationEnd = TimeSpan.Zero;
if (_currentTrackID + 1 == Tracks.Count)
{
_currentTrackID = 0;
}
else
{
_currentTrackID++;
}
});
PreviousTrack = new RelayCommand(() =>
{
if (CurrentTrack == null || Tracks == null || Tracks.Count == 0)
{
return;
}
ServiceHelper.PlayerService.PreviousTrack();
DurationStart = TimeSpan.Zero;
DurationEnd = TimeSpan.Zero;
if (_currentTrackID - 1 == -1)
{
_currentTrackID = Tracks.Count - 1;
}
else
{
_currentTrackID--;
}
});
PlayTrack = new RelayCommand <IAudioTrack>(a => SetNewTrack(a));
PlayResume = new RelayCommand(() => ServiceHelper.PlayerService.ResumePause());
DownloadTrack = new RelayCommand(async() =>
{
var command = new VKSaverDownloadCommand();
//command.Downloads.Add(CoreHelper.GetDownload(CurrentTrack));
await command.TryExecute();
}, () => CurrentTrack != null && !String.IsNullOrEmpty(CurrentTrack.Source));
ShowTrackLyrics = new RelayCommand(() =>
{
NavigationHelper.Navigate(AppViews.TrackLyricsView, CurrentTrack);
},
() => CurrentTrack != null && CurrentTrack.LyricsID != 0);
_timer.Tick += (s, e) =>
{
if (ServiceHelper.PlayerService.CurrentState == PlayerState.Playing)
{
try
{
DurationStart = ServiceHelper.PlayerService.CurrentPosition;
DurationEnd = DurationStart - Duration;
}
catch (Exception) { }
}
};
_timer.Start();
Messenger.Default.Register <PlayTrackMessage>(this, OnPlayTrackMessageReceived);
}
