/// <summary>
/// Loads image data from a local file and set it to current image data.
/// </summary>
/// <param name="item">Target item</param>
internal async Task LoadSetAsync(FileItemViewModel item)
{
_tokenSourceLoading?.TryCancel(); // Canceling already canceled source will be simply ignored.
try
{
_tokenSourceLoading = new CancellationTokenSourcePlus();
byte[] data = null;
if (item.IsAvailableLocal && item.CanLoadDataLocal)
{
data = await FileAddition.ReadAllBytesAsync(ComposeLocalPath(item), _tokenSourceLoading.Token);
}
CurrentItem = item;
CurrentImageData = data;
}
catch (OperationCanceledException)
{
// None.
}
catch (FileNotFoundException)
{
item.Status = FileStatus.NotCopied;
item.IsAliveLocal = false;
}
catch (IOException)
{
item.IsAvailableLocal = false;
}
catch (Exception ex)
{
Debug.WriteLine($"Failed to load image data from local file.\r\n{ex}");
throw new UnexpectedException("Failed to load image data from local file.", ex);
}
finally
{
_tokenSourceLoading?.Dispose();
}
}
/// <summary>
/// Checks files in FlashAir card.
/// </summary>
private async Task CheckFileBaseAsync()
{
OperationStatus = Resources.OperationStatus_Checking;
try
{
using (var manager = new FileManager())
{
_tokenSourceWorking = new CancellationTokenSourcePlus();
// Check firmware version.
_card.FirmwareVersion = await manager.GetFirmwareVersionAsync(_tokenSourceWorking.Token);
// Check CID.
if (_card.CanGetCid)
{
_card.Cid = await manager.GetCidAsync(_tokenSourceWorking.Token);
}
// Check SSID and check if PC is connected to FlashAir card by a wireless connection.
_card.Ssid = await manager.GetSsidAsync(_tokenSourceWorking.Token);
_card.IsWirelessConnected = NetworkChecker.IsWirelessNetworkConnected(_card.Ssid);
// Get all items.
var fileListNew = (await manager.GetFileListRootAsync(_card, _tokenSourceWorking.Token))
.Select(fileItem => new FileItemViewModel(fileItem))
.ToList();
fileListNew.Sort();
// Record time stamp of write event.
if (_card.CanGetWriteTimeStamp)
{
_card.WriteTimeStamp = await manager.GetWriteTimeStampAsync(_tokenSourceWorking.Token);
}
await Task.Run(() =>
{
// Check if any sample is in old items.
var isSample = FileListCore.Any(x => x.Size == 0);
// Check if FlashAir card is changed.
bool isChanged;
if (_card.IsChanged.HasValue)
{
isChanged = _card.IsChanged.Value;
}
else
{
var signaturesOld = new HashSet <string>(FileListCore.Select(x => x.Signature));
isChanged = !fileListNew.Select(x => x.Signature).Any(x => signaturesOld.Contains(x));
}
if (isSample || isChanged)
{
FileListCore.Clear();
}
// Check old items.
foreach (var itemOld in FileListCore)
{
var itemSameIndex = fileListNew.IndexOf(x =>
x.FilePath.Equals(itemOld.FilePath, StringComparison.OrdinalIgnoreCase) &&
(x.Size == itemOld.Size));
if (itemSameIndex >= 0)
{
itemOld.IsAliveRemote = true;
itemOld.FileItem = fileListNew[itemSameIndex].FileItem;
fileListNew.RemoveAt(itemSameIndex);
continue;
}
itemOld.IsAliveRemote = false;
}
// Add new items (This operation may be heavy).
var isLeadOff = true;
foreach (var itemNew in fileListNew)
{
if (isLeadOff)
{
InvokeSafely(() => FileListCoreViewIndex = FileListCoreView.IndexOf(itemNew));
isLeadOff = false;
}
itemNew.IsAliveRemote = true;
FileListCore.Insert(itemNew); // Customized Insert method
}
// Check all local files.
foreach (var item in FileListCore)
{
var info = GetFileInfoLocal(item);
item.IsAliveLocal = IsAliveLocal(info, item.Size);
item.IsAvailableLocal = IsAvailableLocal(info);
item.Status = item.IsAliveLocal ? FileStatus.Copied : FileStatus.NotCopied;
}
// Manage deleted items.
var itemDeletedPairs = FileListCore
.Select((x, Index) => !x.IsAliveRemote ? new { Item = x, Index } : null)
.Where(x => x != null)
.OrderByDescending(x => x.Index)
.ToArray();
foreach (var itemDeletedPair in itemDeletedPairs)
{
var item = itemDeletedPair.Item;
if (Settings.Current.MovesFileToRecycle &&
item.IsDescendant &&
(item.Status == FileStatus.Copied))
{
try
{
Recycle.MoveToRecycle(ComposeLocalPath(item));
item.Status = FileStatus.Recycled;
}
catch (Exception ex)
{
Debug.WriteLine($"Failed to move a file to Recycle.\r\n{ex}");
item.Status = FileStatus.NotCopied;
}
}
if (!item.IsDescendant ||
((item.Status != FileStatus.Copied) && (item.Status != FileStatus.Recycled)))
{
FileListCore.RemoveAt(itemDeletedPair.Index);
}
}
});
// Get thumbnails (from local).
foreach (var item in FileListCore.Where(x => x.IsTarget && !x.HasThumbnail))
{
if (!item.IsAliveLocal || !item.IsAvailableLocal || !item.CanLoadDataLocal)
{
continue;
}
_tokenSourceWorking.Token.ThrowIfCancellationRequested();
try
{
if (item.CanReadExif)
{
item.Thumbnail = await ImageManager.ReadThumbnailAsync(ComposeLocalPath(item));
}
else if (item.CanLoadDataLocal)
{
item.Thumbnail = await ImageManager.CreateThumbnailAsync(ComposeLocalPath(item));
}
}
catch (FileNotFoundException)
{
item.Status = FileStatus.NotCopied;
item.IsAliveLocal = false;
}
catch (IOException)
{
item.IsAvailableLocal = false;
}
catch (ImageNotSupportedException)
{
item.CanLoadDataLocal = false;
}
}
// Get thumbnails (from remote).
foreach (var item in FileListCore.Where(x => x.IsTarget && !x.HasThumbnail))
{
if (!item.IsAliveRemote || !item.CanGetThumbnailRemote)
{
continue;
}
_tokenSourceWorking.Token.ThrowIfCancellationRequested();
try
{
item.Thumbnail = await manager.GetThumbnailAsync(item.FilePath, _card, _tokenSourceWorking.Token);
}
catch (RemoteFileThumbnailFailedException)
{
item.CanGetThumbnailRemote = false;
}
}
}
OperationStatus = Resources.OperationStatus_CheckCompleted;
}
finally
{
FileListCoreViewIndex = -1; // No selection
_tokenSourceWorking?.Dispose();
}
}
/// <summary>
/// Copies files from FlashAir card.
/// </summary>
/// <param name="progress">Progress</param>
private async Task CopyFileBaseAsync(IProgress <ProgressInfo> progress)
{
CopyStartTime = DateTime.Now;
_copyFileCount = 0;
if (!FileListCore.Any(x => x.IsTarget && (x.Status == FileStatus.ToBeCopied)))
{
OperationStatus = Resources.OperationStatus_NoFileToBeCopied;
return;
}
OperationStatus = Resources.OperationStatus_Copying;
try
{
using (var manager = new FileManager())
{
_tokenSourceWorking = new CancellationTokenSourcePlus();
// Check CID.
if (_card.CanGetCid)
{
if (await manager.GetCidAsync(_tokenSourceWorking.Token) != _card.Cid)
{
throw new CardChangedException();
}
}
// Check if upload.cgi is disabled.
if (Settings.Current.DeleteOnCopy && _card.CanGetUpload)
{
_card.Upload = await manager.GetUploadAsync(_tokenSourceWorking.Token);
if (_card.IsUploadDisabled)
{
throw new CardUploadDisabledException();
}
}
while (true)
{
var item = FileListCore.FirstOrDefault(x => x.IsTarget && (x.Status == FileStatus.ToBeCopied));
if (item == null)
{
break; // Copy completed.
}
_tokenSourceWorking.Token.ThrowIfCancellationRequested();
try
{
item.Status = FileStatus.Copying;
FileListCoreViewIndex = FileListCoreView.IndexOf(item);
var localPath = ComposeLocalPath(item);
var localDirectory = Path.GetDirectoryName(localPath);
if (!string.IsNullOrEmpty(localDirectory) && !Directory.Exists(localDirectory))
{
Directory.CreateDirectory(localDirectory);
}
var data = await manager.GetSaveFileAsync(item.FilePath, localPath, item.Size, item.Date, item.CanReadExif, progress, _card, _tokenSourceWorking.Token);
CurrentItem = item;
CurrentImageData = data;
if (!item.HasThumbnail)
{
try
{
if (item.CanReadExif)
{
item.Thumbnail = await ImageManager.ReadThumbnailAsync(CurrentImageData);
}
else if (item.CanLoadDataLocal)
{
item.Thumbnail = await ImageManager.CreateThumbnailAsync(CurrentImageData);
}
}
catch (ImageNotSupportedException)
{
item.CanLoadDataLocal = false;
}
}
item.CopiedTime = DateTime.Now;
item.IsAliveLocal = true;
item.IsAvailableLocal = true;
item.Status = FileStatus.Copied;
_copyFileCount++;
}
catch (RemoteFileNotFoundException)
{
item.IsAliveRemote = false;
}
catch (RemoteFileInvalidException)
{
item.Status = FileStatus.Weird;
}
catch
{
item.Status = FileStatus.ToBeCopied; // Revert to status before copying.
throw;
}
if (Settings.Current.DeleteOnCopy &&
!item.IsReadOnly && IsAliveLocal(item))
{
await manager.DeleteFileAsync(item.FilePath, _tokenSourceWorking.Token);
}
}
}
OperationStatus = string.Format(Resources.OperationStatus_CopyCompleted, _copyFileCount, (int)(DateTime.Now - CopyStartTime).TotalSeconds);
}
finally
{
FileListCoreViewIndex = -1; // No selection
_tokenSourceWorking?.Dispose();
}
}
