private async void Enqueue(Uri uri, string namebase, Mediatype type, string extension = null)
{
DebugUtil.Log(() => "ContentsDownloader: Enqueue " + uri.AbsolutePath);
if (extension == null)
{
var split = uri.AbsolutePath.Split('.');
if (split.Length > 0)
{
extension = "." + split[split.Length - 1].ToLower();
DebugUtil.Log(() => "detected file extension: " + extension);
}
}
await SystemUtil.GetCurrentDispatcher().RunAsync(CoreDispatcherPriority.Low, () =>
{
var req = new DownloadRequest
{
Uri = uri,
NameBase = namebase,
Completed = OnFetched,
Error = OnFailed,
Mediatype = type,
extension = extension
};
DownloadQueue.Enqueue(req);
QueueStatusUpdated?.Invoke(DownloadQueue.Count);
ProcessQueueSequentially();
});
}
private async Task Enqueue(Uri uri, string namebase, Mediatype type, CancellationTokenSource cts, string extension = null)
{
DebugUtil.LogSensitive(() => "ContentsDownloader: Enqueue {0}", uri.AbsolutePath);
if (extension == null)
{
var split = uri.AbsolutePath.Split('.');
if (split.Length > 0)
{
extension = "." + split[split.Length - 1].ToLower();
DebugUtil.Log(() => "detected file extension: " + extension);
}
}
var tcs = new TaskCompletionSource <bool>();
await SystemUtil.GetCurrentDispatcher().RunAsync(CoreDispatcherPriority.Low, () =>
{
var req = new DownloadRequest
{
Uri = uri,
NameBase = namebase,
Completed = OnFetched,
Error = OnFailed,
Mediatype = type,
FileExtension = extension,
CompletionSource = tcs,
CancellationTokenSource = cts,
};
DownloadQueue.Enqueue(req);
QueueStatusUpdated?.Invoke(DownloadQueue.Count);
ProcessQueueSequentially();
});
await tcs.Task;
}
private async Task DownloadToSave(DownloadRequest req)
{
DebugUtil.Log(() => "Download picture: " + req.Uri.OriginalString);
try
{
var geoResult = GeotaggingResult.Result.NotRequested;
var task = HttpClient.GetAsync(req.Uri, HttpCompletionOption.ResponseContentRead);
HttpResponseMessage res;
try
{
res = await task;
}
catch (Exception)
{
req.Error?.Invoke(DownloaderError.Network, geoResult);
return;
}
var imageStream = (await res.Content.ReadAsInputStreamAsync()).AsStreamForRead();
if (req.Mediatype == Mediatype.Image)
{
if (ApplicationSettings.GetInstance().GeotagEnabled)
{
var position = await GeolocatorManager.INSTANCE.GetLatestPosition();
if (position == null)
{
geoResult = GeotaggingResult.Result.FailedToAcquireLocation;
}
else
{
var result = await GeopositionUtil.AddGeotag(imageStream, position);
imageStream = result.Image;
geoResult = result.OperationResult;
}
}
}
using (imageStream)
{
StorageFolder rootFolder;
switch (req.Mediatype)
{
case Mediatype.Image:
rootFolder = KnownFolders.PicturesLibrary;
break;
case Mediatype.Video:
rootFolder = KnownFolders.PicturesLibrary;
// Use Pictures folder according to the behavior of built-in Camera apps
// rootFolder = KnownFolders.VideosLibrary;
break;
default:
return;
}
var folder = await rootFolder.CreateFolderAsync(DIRECTORY_NAME, CreationCollisionOption.OpenIfExists);
var filename = string.Format(req.NameBase + "_{0:yyyyMMdd_HHmmss}" + req.extension, DateTime.Now);
var file = await folder.CreateFileAsync(filename, CreationCollisionOption.GenerateUniqueName);
using (var outStream = await file.OpenStreamForWriteAsync())
{
await imageStream.CopyToAsync(outStream);
}
req.Completed?.Invoke(folder, file, geoResult);
return;
}
}
catch (Exception e)
{
DebugUtil.Log(() => e.Message);
DebugUtil.Log(() => e.StackTrace);
req.Error?.Invoke(DownloaderError.Unknown, GeotaggingResult.Result.NotRequested); // TODO
}
}