protected async Task <bool> DeleteCacheFile()
{
using (var releaser = await _Lock.LockAsync())
{
if (NowPlaying && IsCached)
{
_DeleteRequestedOnPlaying = true;
return(false);
}
}
var result = await VideoDownloadManager.RemoveCacheRequest(NicoVideo.RawVideoId, Quality);
var file = await GetCacheFile();
if (file != null)
{
await file.DeleteAsync();
}
using (var releaser = await _Lock.LockAsync())
{
CacheState = NicoVideoCacheState.NotCacheRequested;
CacheFilePath = null;
VideoFileCreatedAt = default(DateTime);
IsCacheRequested = false;
return(result);
}
}
public async Task RequestCache(bool forceUpdate = false)
{
if (!CanDownload)
{
return;
}
var isCacheFileExist = false;
using (var releaser = await _Lock.LockAsync())
{
isCacheFileExist = !forceUpdate && (IsCached || NowCacheDonwloading);
}
if (isCacheFileExist)
{
// update cached time
await GetCacheFile();
return;
}
using (var releaser = await _Lock.LockAsync())
{
VideoDownloadManager.DownloadStarted += VideoDownloadManager_DownloadStarted;
IsCacheRequested = true;
CacheState = NicoVideoCacheState.Pending;
VideoFileCreatedAt = DateTime.Now;
await VideoDownloadManager.AddCacheRequest(NicoVideo.RawVideoId, Quality, forceUpdate);
await NicoVideo.OnCacheRequested();
}
}
private async Task Initialize()
{
// キャッシュ完了したアイテムを検索
await RetrieveCacheCompletedVideos();
// ダウンロード中の情報を復元
await VideoDownloadManager.Initialize();
IsInitialized = true;
Completed?.Invoke(this);
}
private NiconicoMediaManager(HohoemaApp app)
{
_HohoemaApp = app;
VideoDownloadManager = new VideoDownloadManager(_HohoemaApp, this);
VideoDownloadManager.Requested += VideoDownloadManager_Requested;
VideoDownloadManager.RequestCanceled += VideoDownloadManager_RequestCanceled;
VideoDownloadManager.DownloadStarted += VideoDownloadManager_DownloadStarted;
VideoDownloadManager.DownloadCompleted += VideoDownloadManager_DownloadCompleted;
VideoDownloadManager.DownloadCanceled += VideoDownloadManager_DownloadCanceled;
_VideoIdToNicoVideo = new Dictionary <string, NicoVideo>();
_CacheVideos = new ObservableCollection <NicoVideo>();
CacheVideos = new ReadOnlyObservableCollection <NicoVideo>(_CacheVideos);
_HohoemaApp.OnSignin += _HohoemaApp_OnSignin;
}
public async Task <StorageFile> GetCacheFile()
{
using (var releaser = await _Lock.LockAsync())
{
if (IsCached)
{
if (string.IsNullOrEmpty(CacheFilePath))
{
throw new Exception();
}
var file = await StorageFile.GetFileFromPathAsync(CacheFilePath);
VideoFileCreatedAt = file.DateCreated.DateTime;
return(file);
}
else if (NowCacheDonwloading)
{
var downloadOp = await VideoDownloadManager.GetDownloadingVideoOperation(this.RawVideoId, this.Quality);
if (downloadOp != null)
{
VideoFileCreatedAt = downloadOp.ResultFile.DateCreated.DateTime;
return(downloadOp.ResultFile as StorageFile);
}
else
{
return(null);
}
}
else
{
return(null);
}
}
}