protected async Task ProcessDownloadedFilesAsync()
{
// Back up existing file
foreach (var item in InputSources)
{
ThrowIfCancellationRequested();
// Get the absolute output path
FileSystemPath file = OutputDirectory + Path.GetFileName(item.AbsolutePath);
// Check if it's a file conflict
if (!file.FileExists)
{
continue;
}
// Move the file to temp
await Task.Run(() => FileManager.MoveFile(file, LocalTempDir.TempPath + file.Name, false));
}
// Move downloaded files to output
foreach (var item in InputSources)
{
ThrowIfCancellationRequested();
// Get the absolute path
var file = ServerTempDir.TempPath + Path.GetFileName(item.AbsolutePath);
var outputPath = OutputDirectory + Path.GetFileName(item.AbsolutePath);
// Move the downloaded file from temp to the output
FileManager.MoveFile(file, outputPath, false);
// Flag the file as processed
ProcessedPaths.Add(outputPath);
}
}
public async Task StartAsync()
{
if (OperationRunning)
{
throw new InvalidOperationException("The downloader can not start while running");
}
CurrentDownloadState = DownloadState.Running;
// Flag the operation as running
OperationRunning = true;
// Reset the progress counter
CurrentStep = 0;
using (LocalTempDir = new TempDirectory(true))
{
using (ServerTempDir = new TempDirectory(true))
{
try
{
// Download files to temp
await DownloadFromServerToTempAsync();
// Create directory if it doesn't exist
if (!OutputDirectory.DirectoryExists)
{
Directory.CreateDirectory(OutputDirectory);
ProcessedPaths.Add(OutputDirectory);
}
// Process the download
if (IsCompressed)
{
await ProcessCompressedDownloadAsync();
}
else
{
await ProcessDownloadedFilesAsync();
}
}
catch (Exception ex)
{
if (CancellationRequested)
{
Logger.Debug(ex, "Downloading files");
await Services.MessageUI.DisplayMessageAsync(Resources.Download_Canceled, Resources.Download_CanceledHeader, MessageType.Information);
}
else
{
Logger.Error(ex, "Downloading files");
await Services.MessageUI.DisplayMessageAsync(Resources.Download_Failed, Resources.Download_FailedHeader, MessageType.Error);
}
// Restore the stopped download
await RestoreStoppedDownloadAsync();
// Flag that the operation is no longer running
OperationRunning = false;
CurrentDownloadState = CancellationRequested ? DownloadState.Canceled : DownloadState.Failed;
OnDownloadComplete();
return;
}
}
}
// Max out the progress
ItemCurrentProgress = ItemMaxProgress;
TotalCurrentProgress = TotalMaxProgress;
OnStatusUpdated(new Progress(TotalCurrentProgress, TotalMaxProgress));
CurrentDownloadState = DownloadState.Succeeded;
Logger.Info("The download operation has completed");
await Services.MessageUI.DisplayMessageAsync(Resources.Download_Success, Resources.Download_SuccessHeader, MessageType.Success);
// Flag the operation as complete
OperationRunning = false;
OnDownloadComplete();
}
protected async Task ProcessCompressedDownloadAsync()
{
await Task.Run(async() =>
{
// Handle each input source
foreach (var inputSource in InputSources)
{
// Reset file progress
ItemCurrentProgress = 0;
// Get the absolute output path
FileSystemPath file = ServerTempDir.TempPath + Path.GetFileName(inputSource.AbsolutePath);
DisplayInputSource = file;
// Open the zip file
using (var zip = ZipFile.OpenRead(file))
{
// Set file progress to its entry count
ItemMaxProgress = zip.Entries.Count;
// Extract each entry
foreach (var entry in zip.Entries)
{
ThrowIfCancellationRequested();
// Get the full entry name
var entryName = entry.FullName.Replace('/', '\\');
// Get the absolute output path
var outputPath = OutputDirectory + entryName;
DisplayOutputSource = outputPath;
// Check if the entry is a directory
if (entryName.EndsWith("\\") && entry.Name == String.Empty)
{
// Create directory if it doesn't exist
if (!outputPath.DirectoryExists)
{
Directory.CreateDirectory(outputPath);
ProcessedPaths.Add(outputPath);
}
continue;
}
// Backup conflict file
if (outputPath.FileExists)
{
await Task.Run(() => FileManager.MoveFile(outputPath, LocalTempDir.TempPath + entryName, false));
}
// Create directory if it doesn't exist
if (!outputPath.Parent.DirectoryExists)
{
Directory.CreateDirectory(outputPath.Parent);
}
// Extract the compressed file
entry.ExtractToFile(outputPath);
// Flag the file as processed
ProcessedPaths.Add(outputPath);
// Increase file progress
ItemCurrentProgress++;
// Set total progress
TotalCurrentProgress = (int)Math.Floor(100 * InputSources.Count + ((ItemCurrentProgress / ItemMaxProgress) * 10));
OnStatusUpdated(new Progress(TotalCurrentProgress, TotalMaxProgress));
}
}
// Delete the zip file
FileManager.DeleteFile(file);
}
DisplayInputSource = null;
DisplayOutputSource = null;
});
}
