示例#1
0
        public async Task <IStorageHistory> RestoreFromTrashAsync(IStorageItemWithPath source, string destination, IProgress <float> progress, IProgress <FileSystemStatusCode> errorCode, CancellationToken cancellationToken)
        {
            var connection = await AppServiceConnectionHelper.Instance;

            if (connection == null || string.IsNullOrWhiteSpace(source.Path) || source.Path.StartsWith(@"\\?\") || string.IsNullOrWhiteSpace(destination) || destination.StartsWith(@"\\?\"))
            {
                // Fallback to builtin file operations
                return(await filesystemOperations.RestoreFromTrashAsync(source, destination, progress, errorCode, cancellationToken));
            }

            var operationID = Guid.NewGuid().ToString();

            using var _ = cancellationToken.Register(CancelOperation, operationID, false);

            EventHandler <Dictionary <string, object> > handler = (s, e) => OnProgressUpdated(s, e, progress);

            connection.RequestReceived += handler;

            var(status, response) = await connection.SendMessageForResponseAsync(new ValueSet()
            {
                { "Arguments", "FileOperation" },
                { "fileop", "MoveItem" },
                { "operationID", operationID },
                { "filepath", source.Path },
                { "destpath", destination },
                { "overwrite", false }
            });

            var result = (FilesystemResult)(status == AppServiceResponseStatus.Success &&
                                            response.Get("Success", false));

            if (connection != null)
            {
                connection.RequestReceived -= handler;
            }

            if (result)
            {
                progress?.Report(100.0f);
                var movedItems = JsonConvert.DeserializeObject <IEnumerable <string> >(response["MovedItems"] as string);
                errorCode?.Report(FileSystemStatusCode.Success);
                if (movedItems != null && movedItems.Count() == 1)
                {
                    // Recycle bin also stores a file starting with $I for each item
                    await DeleteAsync(StorageItemHelpers.FromPathAndType(
                                          Path.Combine(Path.GetDirectoryName(source.Path), Path.GetFileName(source.Path).Replace("$R", "$I")), source.ItemType),
                                      null, null, true, cancellationToken);

                    return(new StorageHistory(FileOperationType.Restore, source,
                                              StorageItemHelpers.FromPathAndType(movedItems.Single(), source.ItemType)));
                }
                return(null); // Cannot undo overwrite operation
            }
            else
            {
                // Retry failed operations
                return(await filesystemOperations.RestoreFromTrashAsync(source, destination, progress, errorCode, cancellationToken));
            }
        }
        public async Task <IStorageHistory> RestoreFromTrashAsync(IStorageItemWithPath source, string destination, IProgress <float> progress, IProgress <FileSystemStatusCode> errorCode, CancellationToken cancellationToken)
        {
            var connection = await AppServiceConnectionHelper.Instance;

            if (connection == null || string.IsNullOrWhiteSpace(source.Path) || source.Path.StartsWith(@"\\?\", StringComparison.Ordinal) || string.IsNullOrWhiteSpace(destination) || destination.StartsWith(@"\\?\", StringComparison.Ordinal) || FtpHelpers.IsFtpPath(destination))
            {
                // Fallback to builtin file operations
                return(await filesystemOperations.RestoreFromTrashAsync(source, destination, progress, errorCode, cancellationToken));
            }

            var operationID = Guid.NewGuid().ToString();

            using var r = cancellationToken.Register(CancelOperation, operationID, false);

            EventHandler <Dictionary <string, object> > handler = (s, e) => OnProgressUpdated(s, e, operationID, progress);

            connection.RequestReceived += handler;

            var moveResult = new ShellOperationResult();

            var(status, response) = await connection.SendMessageForResponseAsync(new ValueSet()
            {
                { "Arguments", "FileOperation" },
                { "fileop", "MoveItem" },
                { "operationID", operationID },
                { "filepath", source.Path },
                { "destpath", destination },
                { "overwrite", false },
                { "HWND", NativeWinApiHelper.CoreWindowHandle.ToInt64() }
            });

            var result = (FilesystemResult)(status == AppServiceResponseStatus.Success &&
                                            response.Get("Success", false));
            var shellOpResult = JsonConvert.DeserializeObject <ShellOperationResult>(response.Get("Result", ""));

            moveResult.Items.AddRange(shellOpResult?.Items ?? Enumerable.Empty <ShellOperationItemResult>());

            if (connection != null)
            {
                connection.RequestReceived -= handler;
            }

            result &= (FilesystemResult)moveResult.Items.All(x => x.Succeeded);

            if (result)
            {
                progress?.Report(100.0f);
                errorCode?.Report(FileSystemStatusCode.Success);
                var movedSources = moveResult.Items.Where(x => new[] { source }.Select(s => s.Path).Contains(x.Source)).Where(x => x.Succeeded && x.Destination != null && x.Source != x.Destination);
                if (movedSources.Any())
                {
                    // Recycle bin also stores a file starting with $I for each item
                    await DeleteItemsAsync(movedSources.Select(src => StorageHelpers.FromPathAndType(
                                                                   Path.Combine(Path.GetDirectoryName(src.Source), Path.GetFileName(src.Source).Replace("$R", "$I", StringComparison.Ordinal)),
                                                                   new[] { source }.Single(s => s.Path == src.Source).ItemType)), null, null, true, cancellationToken);

                    return(new StorageHistory(FileOperationType.Restore, source,
                                              StorageHelpers.FromPathAndType(movedSources.Single().Destination, source.ItemType)));
                }
                return(null); // Cannot undo overwrite operation
            }
            else
            {
                // Retry failed operations
                return(await filesystemOperations.RestoreFromTrashAsync(source, destination, progress, errorCode, cancellationToken));
            }
        }