/// <summary>
/// Starts resizing the image operation
/// </summary>
/// <param name="action">Determine whether the image files should be saved as, or updated or resize image is used from sharing</param>
/// <param name="processedImageAction">Action method which retrievs the resized image. Can be used for sharing.</param>
/// <returns>Task which indicates if the current resize operation was successfull</returns>
public async Task <bool> ResizeImages(ImageAction action, Action <ImageFile, String> processedImageAction = null)
{
IProgressBarDialogService progressBarDialog = !IsShareTarget?_progressBarDialogService.ProgressBarDialogFactory() : null;
try
{
Resizing = true;
//if no file is selected open file picker
if (ImageFiles == null || ImageFiles.Count == 0)
{
await OpenFilePicker();
}
#pragma warning disable CS4014 // Because this call is not awaited, execution of the current method continues before the call is completed
progressBarDialog?.StartAsync(ImageFiles.Count);
#pragma warning restore CS4014 // Because this call is not awaited, execution of the current method continues before the call is completed
String suggestedFileName = String.Empty;
String targetStorageFolder = Settings.DefaultSaveAsTargetFolder;
Exception lastException = null;
if (ImageFiles != null)
{
foreach (ImageFile currentImage in ImageFiles)
{
try
{
SelectedFile = currentImage;
suggestedFileName = _imageFileService.GenerateResizedFileName(currentImage, currentImage.NewWidth, currentImage.NewHeight);
if (progressBarDialog != null)
{
progressBarDialog.CurrentItem = suggestedFileName;
}
//if the stream is disposed CanSeek and CanRead is false
if (currentImage.Stream == null || !currentImage.Stream.CanSeek && !currentImage.Stream.CanRead)
{
var imageFile = (await _imageFileService.LoadImageFileAsync(currentImage.Path));
if (imageFile?.Stream != null)
{
currentImage.Stream = imageFile.Stream;
}
else
{
_loggerService.LogEvent("Could not load stream.", new Dictionary <string, string>()
{
{ nameof(currentImage.Path), currentImage.Path }
});
continue;
}
}
TaskCompletionSource <MemoryStream> taskMemoryStreamCompletionSource = new TaskCompletionSource <MemoryStream>();
if (!IsShareTarget)
{
//do the resizing in a seperate thread using Task.Run
try
{
var ms = await Task.Run(() => _resizeService.ResizeAsync(currentImage.Stream, currentImage.NewWidth, currentImage.NewHeight, suggestedFileName, _localSettings.Settings.ImageQuality));
taskMemoryStreamCompletionSource.SetResult(ms);
}
catch (Exception e)
{
taskMemoryStreamCompletionSource.SetException(e);
}
}
else
{
//do the resizing on the main thread in share target to avoid issues see #53
var ms = await _resizeService.ResizeAsync(currentImage.Stream, currentImage.NewWidth, currentImage.NewHeight, suggestedFileName, _localSettings.Settings.ImageQuality);
taskMemoryStreamCompletionSource.SetResult(ms);
}
using (MemoryStream resizedImageFileStream = await taskMemoryStreamCompletionSource.Task)
{
//log image size
_loggerService?.LogEvent(nameof(IResizeService.ResizeAsync), new Dictionary <String, String>()
{
{ $"{nameof(ImageFile)}{nameof(Width)}", $"{currentImage?.Width}" },
{ $"{nameof(ImageFile)}{nameof(Height)}", $"{currentImage?.Height}" },
{ nameof(Width), $"{currentImage?.NewHeight }" },
{ nameof(Height), $"{currentImage?.NewHeight}" },
{ nameof(ImageAction), $"{action}" }
});
//overwrite current ImageStoreage
if (action.Equals(ImageAction.Save))
{
try
{
await _imageFileService.WriteBytesAsync(currentImage, resizedImageFileStream.ToArray());
LastFile = currentImage;
}
catch (Contract.Exceptions.UnauthorizedAccessException)
{
//log the UnauthorizedAccessException
_loggerService?.LogEvent(nameof(ResizeImages), new Dictionary <String, String>()
{
{ nameof(Contract.Exceptions.UnauthorizedAccessException), $"{true}" },
});
//we can't override the current file try for the next files saveAs
action = ImageAction.SaveAs;
await ShowPermissionDeniedDialog(progressBarDialog);
ImageFile File = await _imageFileService.PickSaveFileAsync(currentImage.Path, suggestedFileName);
if (null != File)
{
//try to apply the new storagefolder (if the user selected a new location)
targetStorageFolder = Path.GetDirectoryName(File.Path);
await _imageFileService.WriteBytesAsync(File, resizedImageFileStream.ToArray());
LastFile = File;
}
}
} //create new ImageStoreage
else if (action.Equals(ImageAction.SaveAs))
{
ImageFile imageFile = null;
try
{
//if the user enabled the option "save images to same folder"
if (Settings.SaveFilesForSaveAsInSameFolder && !AppStartType.AppIsShareTarget.Equals(_appStartType))
{
targetStorageFolder = Path.GetDirectoryName(currentImage.Path);
}
if (String.IsNullOrEmpty(targetStorageFolder))
{
if (SingleFile)
{
//get default path
imageFile = await _imageFileService.PickSaveFileAsync(currentImage.Path, suggestedFileName);
}
else
{
imageFile = await _imageFileService.PickSaveFolderAsync(currentImage.Path, suggestedFileName);
}
if (imageFile == null)
{
//if user canceled dialog try again
imageFile = await _imageFileService.PickSaveFileAsync(currentImage.Path, suggestedFileName);
}
//File can be null when user aborted picksavefile dialog
if (imageFile != null)
{
targetStorageFolder = Path.GetDirectoryName(imageFile.Path);
await _imageFileService.WriteBytesAsync(imageFile, resizedImageFileStream.ToArray());
LastFile = imageFile;
}
}
else
{
await _imageFileService.WriteBytesAsync(targetStorageFolder, suggestedFileName, resizedImageFileStream.ToArray());
}
}
catch (FileNotFoundException)
{
//happens if the targetStorageFolder from the settings was removed (or renamed) meanwhile
_loggerService?.LogEvent(nameof(ResizeImages), new Dictionary <String, String>()
{
{ nameof(FileNotFoundException), true.ToString() },
});
//happens if the targetStorageFolder was removed meanwhile
Settings.DefaultSaveAsTargetFolder = String.Empty;
//tell the user to save the file in an other location
imageFile = await _imageFileService.PickSaveFileAsync(currentImage.Path, suggestedFileName);
//try to apply the new storagefolder (if the user selected a new location)
if (imageFile != null && Path.GetDirectoryName(targetStorageFolder) != Path.GetDirectoryName(imageFile.Path))
{
targetStorageFolder = Path.GetDirectoryName(imageFile.Path);
await _imageFileService.WriteBytesAsync(imageFile, resizedImageFileStream.ToArray());
}
}
catch (Contract.Exceptions.UnauthorizedAccessException)
{
//log the UnauthorizedAccessException
_loggerService?.LogEvent(nameof(ResizeImages), new Dictionary <String, String>()
{
{ nameof(Contract.Exceptions.UnauthorizedAccessException), true.ToString() },
});
//tell the user to save the file in an other location
imageFile = await _imageFileService.PickSaveFileAsync(currentImage.Path, suggestedFileName);
//try to apply the new storagefolder (if the user selected a new location)
if (imageFile != null && Path.GetDirectoryName(targetStorageFolder) != Path.GetDirectoryName(imageFile.Path))
{
targetStorageFolder = Path.GetDirectoryName(imageFile.Path);
await _imageFileService.WriteBytesAsync(imageFile, resizedImageFileStream.ToArray());
}
await ShowPermissionDeniedDialog(progressBarDialog);
}
if (null != imageFile)
{
LastFile = imageFile;
}
_loggerService?.LogEvent(nameof(ResizeImages), new Dictionary <String, String>()
{
{ nameof(currentImage.Path), $"{currentImage.Path}" }
});
}
else if (action.Equals(ImageAction.Process))
{
String TempFolder = _applicationService.GetTemporaryFolderPath();
ImageFile temp = await _imageFileService.WriteBytesAsync(TempFolder, suggestedFileName, resizedImageFileStream.ToArray());
processedImageAction?.Invoke(temp, $"{suggestedFileName}");
}
//open resized image depending whether only one image is resized and the user enabled this option
if (SingleFile && LastFile != null && action != ImageAction.Process &&
_localSettings.Settings.EnabledOpenSingleFileAfterResize)
{
OpenFileCommand.Execute(LastFile);
}
}
currentImage?.Stream?.Dispose();
}
catch (NotSupportedException e)
{
_loggerService?.LogException($"{nameof(ResizeImages)}{nameof(ImageFiles)}", e,
new Dictionary <string, string>()
{
{ nameof(suggestedFileName), suggestedFileName }
});
await _pageDialogService?.ShowAsync(_resourceLoader.GetString("ImageTypNotSupported"));
}
catch (InvalidOperationException e)
{
//for example when enterted width and height is zero. 'Target width 0 and height 0 must be greater than zero.'
lastException = e;
}
catch (FileLoadException e)
{
//for example The process cannot access the file because it is being used by another process.
lastException = e;
}
catch (UnknownImageFormatException e)
{
lastException = e;
}
catch (Exception e)
{
lastException = e;
_loggerService?.LogException($"{nameof(ResizeImages)}{nameof(ImageFiles)}", e);
}
if (progressBarDialog != null)
{
progressBarDialog.ProcessedItems++;
if (progressBarDialog.AbortedClicked())
{
_loggerService?.LogEvent(nameof(IResizeService.ResizeAsync), new Dictionary <String, String>()
{
{ nameof(progressBarDialog.AbortedClicked), Boolean.TrueString }
});
return(false);
}
}
}
if (_localSettings != null && _localSettings.Settings.ShowSuccessMessage && LastFile != null)
{
await _pageDialogService?.ShowAsync(GenerateSuccess(LastFile));
}
if (IsShareTarget)
{
_shareService.EndShareTargetOperation();
}
Resizing = false;
if (lastException != null)
{
if (lastException is InvalidOperationException || lastException is FileLoadException)
{
await _pageDialogService.ShowAsync(lastException.Message);
}
if (lastException is UnknownImageFormatException)
{
String message = _resourceLoader.GetString("UnknownImageFormatException");
if (!String.IsNullOrEmpty(message))
{
message = String.Format(message, string.Join(", ", _imageFileService.FileTypeFilter));
await _pageDialogService.ShowAsync(message);
}
}
}
}
}
catch (Exception e)
{
_loggerService?.LogException(nameof(ResizeImages), e);
_loggerService?.LogEvent(nameof(IResizeService.ResizeAsync), new Dictionary <String, String>()
{
{ "ResizeFinished", "false" }
});
return(false);
}
finally
{
progressBarDialog?.Stop();
Resizing = false;
}
//log image size
_loggerService?.LogEvent(nameof(IResizeService.ResizeAsync), new Dictionary <String, String>()
{
{ "ResizeFinished", "true" }
});
return(true);
}