/// <summary>
/// Возвращает сохраненный перемешанный плейлист.
/// </summary>
public async Task <IEnumerable <IAudioTrack> > GetShuffledPlaylist()
{
var file = await FileHelper.GetLocalFileFromName(AppConstants.ShuffledPlaylistFileName);
if (file == null)
{
return(null);
}
string json = await FileHelper.ReadTextFromFile(file);
if (String.IsNullOrEmpty(json))
{
return(null);
}
return(JsonSerializationHelper.DeserializeFromJson <List <AudioTrack> >(json));
}
/// <summary>
/// Обновляет менеджер воспроизведения.
/// </summary>
public async Task Update(bool reset = false)
{
if (reset)
{
_tracks = null;
return;
}
StorageFile file = null;
if (_isShuffleMode)
{
file = await FileHelper.GetLocalFileFromName(AppConstants.ShuffledPlaylistFileName);
}
else
{
file = await FileHelper.GetLocalFileFromName(AppConstants.PlaylistFileName);
}
if (file == null)
{
#if DEBUG
if (_isShuffleMode)
{
Debug.WriteLine("PlaybackManager cant find shuffled playlist file.");
}
else
{
Debug.WriteLine("PlaybackManager cant find normal playlist file.");
}
#endif
return;
}
string json = await FileHelper.ReadTextFromFile(file);
if (String.IsNullOrEmpty(json))
{
#if DEBUG
Debug.WriteLine("Playlist file is empty.");
#endif
return;
}
_tracks = JsonSerializationHelper.DeserializeFromJson <List <AudioTrack> >(json);
}
/// <summary>
/// Возвращает список кэшированных сообщений указанной беседы.
/// </summary>
/// <param name="convID">Идентификатор беседы.</param>
public async Task <CachedConversationOld> GetConversationFromCache(long convID)
{
var file = await GetCachedFile(GetConversationFileName(convID));
if (file == null)
{
return(null);
}
string content = await FileHelper.ReadTextFromFile(file);
if (String.IsNullOrEmpty(content))
{
return(null);
}
var result = JsonSerializationHelper.DeserializeFromJson <CachedConversationOld>(content);
return(result);
}
/// <summary>
/// Возвращает список кэшированных диалогов.
/// </summary>
public async Task <List <VKDialog> > GetDialogsFromCache()
{
var file = await GetCachedFile(GetDialogsFileName());
if (file == null)
{
return(null);
}
string content = await FileHelper.ReadTextFromFile(file);
if (String.IsNullOrEmpty(content))
{
return(null);
}
var result = JsonSerializationHelper.DeserializeFromJson <List <VKDialog> >(content);
return(result);
}