public VideoDownloadManager(HohoemaApp hohoemaApp, VideoCacheManager mediaManager)
{
HohoemaApp = hohoemaApp;
MediaManager = mediaManager;
// ダウンロード完了をバックグラウンドで処理
CoreApplication.BackgroundActivated += CoreApplication_BackgroundActivated;
CoreApplication.Suspending += CoreApplication_Suspending;
}
public NicoVideo(string rawVideoid, NiconicoContentProvider contentProvider, NiconicoContext context, VideoCacheManager manager)
{
RawVideoId = rawVideoid;
_ContentProvider = contentProvider;
_Context = context;
CacheManager = manager;
CommentClient = new CommentClient(_Context, RawVideoId);
}
static internal async Task <VideoCacheManager> Create(HohoemaApp app)
{
var man = new VideoCacheManager(app);
await man.Initialize();
// await man.RetrieveCacheCompletedVideos();
return(man);
}
private async void OnDownloadProgress(object sender, DownloadOperation op)
{
Debug.WriteLine($"{op.RequestedUri}:{op.Progress.TotalBytesToReceive}");
var req = VideoCacheManager.CacheRequestInfoFromFileName(op.ResultFile);
var progress = await GetCacheProgress(req.RawVideoId, req.Quality);
progress.DownloadOperation = op;
DownloadProgress?.Invoke(this, progress);
UpdateProgressToast(req, op);
}
/// <summary>
/// キャッシュダウンロードのタスクから
/// ダウンロードの情報を復元します
/// </summary>
/// <returns></returns>
private async Task RestoreBackgroundDownloadTask()
{
// TODO: ユーザーのログイン情報を更新してダウンロードを再開する必要がある？
// ユーザー情報の有効期限が切れていた場合には最初からダウンロードし直す必要があるかもしれません
var tasks = await BackgroundDownloader.GetCurrentDownloadsForTransferGroupAsync(_NicoCacheVideoBGTransferGroup);
foreach (var task in tasks)
{
NicoVideoCacheProgress info = null;
try
{
var _info = VideoCacheManager.CacheRequestInfoFromFileName(task.ResultFile);
var nicoVideo = new NicoVideo(_info.RawVideoId, _HohoemaApp.ContentProvider, _HohoemaApp.NiconicoContext, _HohoemaApp.CacheManager);
var session = await nicoVideo.CreateVideoStreamingSession(_info.Quality, forceDownload : true);
if (session?.Quality == _info.Quality)
{
continue;
}
info = new NicoVideoCacheProgress(_info, task, session);
await RestoreDonloadOperation(info, task);
Debug.WriteLine($"実行中のキャッシュBGDLを補足: {info.RawVideoId} {info.Quality}");
}
catch
{
Debug.WriteLine(task.ResultFile + "のキャッシュダウンロード操作を復元に失敗しました");
continue;
}
try
{
task.Resume();
}
catch
{
if (task.Progress.Status != BackgroundTransferStatus.Running)
{
await RemoveDownloadOperation(info);
// ダウンロード再開に失敗したらキャッシュリクエストに積み直します
// 失敗の通知はここではなくバックグラウンドタスクの 後処理 として渡されるかもしれません
DownloadProgress?.Invoke(this, info);
}
}
}
}
public DmcQualityNicoVideo(NicoVideoQuality quality, NicoVideo nicoVideo, VideoCacheManager context)
: base(quality, nicoVideo, context)
{
}
public OriginalQualityNicoVideo(NicoVideo nicoVideo, VideoCacheManager context)
: base(NicoVideoQuality.Smile_Original, nicoVideo, context)
{
}
public LowQualityNicoVideo(NicoVideo nicoVideo, VideoCacheManager context)
: base(NicoVideoQuality.Smile_Low, nicoVideo, context)
{
}
// 次のキャッシュダウンロードを試行
// ダウンロード用の本数
private async Task TryNextCacheRequestedVideoDownload()
{
if (State != CacheManagerState.Running)
{
return;
}
NicoVideoCacheRequest nextDownloadItem = null;
using (var releaser = await _CacheRequestProcessingLock.LockAsync())
{
while (CanAddDownloadLine)
{
if (_DownloadOperations.Count == 0)
{
nextDownloadItem = _CacheDownloadPendingVideos
.FirstOrDefault();
}
if (nextDownloadItem == null)
{
break;
}
if (_DownloadOperations.Any(x => x.RawVideoId == nextDownloadItem.RawVideoId && x.Quality == nextDownloadItem.Quality))
{
_CacheDownloadPendingVideos.Remove(nextDownloadItem);
break;
}
Debug.WriteLine($"キャッシュ準備を開始: {nextDownloadItem.RawVideoId} {nextDownloadItem.Quality}");
// 動画ダウンロードURLを取得
var nicoVideo = new NicoVideo(nextDownloadItem.RawVideoId, _HohoemaApp.ContentProvider, _HohoemaApp.NiconicoContext, _HohoemaApp.CacheManager);
var videoInfo = await _HohoemaApp.ContentProvider.GetNicoVideoInfo(nextDownloadItem.RawVideoId);
// DownloadSessionを保持して、再生完了時にDisposeさせる必要がある
var downloadSession = await nicoVideo.CreateVideoStreamingSession(nextDownloadItem.Quality, forceDownload : true);
var uri = await downloadSession.GetDownloadUrlAndSetupDonwloadSession();
var downloader = new BackgroundDownloader()
{
TransferGroup = _NicoCacheVideoBGTransferGroup
};
downloader.SuccessToastNotification = MakeSuccessToastNotification(videoInfo);
downloader.FailureToastNotification = MakeFailureToastNotification(videoInfo);
// 保存先ファイルの確保
var filename = VideoCacheManager.MakeCacheVideoFileName(
videoInfo.Title,
nextDownloadItem.RawVideoId,
videoInfo.MovieType,
downloadSession.Quality
);
var videoFolder = await _HohoemaApp.GetVideoCacheFolder();
var videoFile = await videoFolder.CreateFileAsync(filename, CreationCollisionOption.OpenIfExists);
// ダウンロード操作を作成
var operation = downloader.CreateDownload(uri, videoFile);
var progress = new NicoVideoCacheProgress(nextDownloadItem, operation, downloadSession);
await AddDownloadOperation(progress);
Debug.WriteLine($"キャッシュ準備完了: {nextDownloadItem.RawVideoId} {nextDownloadItem.Quality}");
// ダウンロードを開始
/*
* if (Helpers.ApiContractHelper.IsFallCreatorsUpdateAvailable)
* {
* operation.IsRandomAccessRequired = true;
* }
*/
var action = operation.StartAsync();
action.Progress = OnDownloadProgress;
var task = action.AsTask();
TaskIdToCacheProgress.Add(task.Id, progress);
var _ = task.ContinueWith(OnDownloadCompleted);
VideoCacheStateChanged?.Invoke(this, new VideoCacheStateChangedEventArgs()
{
CacheState = NicoVideoCacheState.Downloading,
Request = progress
});
Debug.WriteLine($"キャッシュ開始: {nextDownloadItem.RawVideoId} {nextDownloadItem.Quality}");
SendUpdatableToastWithProgress(videoInfo.Title, nextDownloadItem);
// DL作業を作成できたらDL待ちリストから削除
_CacheDownloadPendingVideos.Remove(nextDownloadItem);
await SaveDownloadRequestItems();
}
}
}
private async Task RetrieveCacheCompletedVideos()
{
var videoFolder = await _HohoemaApp.GetVideoCacheFolder();
if (videoFolder != null)
{
var files = await videoFolder.GetFilesAsync();
foreach (var file in files)
{
if (!(file.FileType == ".mp4" || file.FileType == ".flv"))
{
continue;
}
// ファイル名の最後方にある[]の中身の文字列を取得
// (動画タイトルに[]が含まれる可能性に配慮)
var match = NicoVideoIdRegex.Match(file.Name);
var id = match.Groups[1]?.Value;
NicoVideoQuality quality = NicoVideoQuality.Unknown;
if (string.IsNullOrEmpty(id))
{
// 外部キャッシュとして取得可能かをチェック
match = ExternalCachedNicoVideoIdRegex.Match(file.Name);
if (match.Groups.Count > 0)
{
id = match.Groups[match.Groups.Count - 1].Value;
}
// 動画IDを抽出不可だった場合はスキップ
if (string.IsNullOrEmpty(id))
{
continue;
}
}
else
{
quality = VideoCacheManager.GetQualityFromFileName(file.Name);
}
var info = new NicoVideoCacheInfo()
{
RawVideoId = id,
Quality = quality,
FilePath = file.Path,
RequestAt = file.DateCreated.DateTime
};
_CacheVideos.AddOrUpdate(info.RawVideoId,
(x) =>
{
return(new List <NicoVideoCacheInfo>()
{
info
});
},
(x, y) =>
{
var tempinfo = y.FirstOrDefault(z => z.Quality == info.Quality);
if (tempinfo == null)
{
y.Add(info);
}
else
{
tempinfo.RequestAt = info.RequestAt;
tempinfo.FilePath = info.FilePath;
}
return(y);
});
VideoCacheStateChanged?.Invoke(this, new VideoCacheStateChangedEventArgs()
{
Request = info,
CacheState = NicoVideoCacheState.Cached
});
Debug.Write(".");
}
}
}
