/// <summary>
/// Creates new file and folder placeholders in the user file system in this folder.
/// </summary>
/// <param name="newItemsInfo">Array of new files and folders.</param>
/// <returns>Number of items created.</returns>
public async Task <uint> CreateAsync(IFileSystemItemMetadata[] newItemsInfo)
{
string userFileSystemParentPath = userFileSystemPath;
try
{
// Because of the on-demand population the file or folder placeholder may not exist in the user file system.
// Here we also check that the folder content was loaded into user file system (the folder is not offline).
if (Directory.Exists(userFileSystemParentPath) &&
!new DirectoryInfo(userFileSystemParentPath).Attributes.HasFlag(System.IO.FileAttributes.Offline))
{
// Here we save current user file system path inside file/folder.
// If the file/folder is moved or renamed while this app is not running,
// we extract the saved path when this app starts and sync the file/folder to the remote storage.
foreach (var newItemInfo in newItemsInfo)
{
string userFileSystemPath = Path.Combine(userFileSystemParentPath, newItemInfo.Name);
newItemInfo.CustomData = new CustomData
{
OriginalPath = userFileSystemPath
}.Serialize();
}
// Create placeholders.
uint created = await virtualDrive.Engine.ServerNotifications(userFileSystemParentPath).CreateAsync(newItemsInfo);
// Create ETags.
foreach (IFileSystemItemMetadata newItemInfo in newItemsInfo)
{
FileSystemItemMetadataExt newItemInfoExt = newItemInfo as FileSystemItemMetadataExt ?? throw new NotImplementedException($"{nameof(FileSystemItemMetadataExt)}");
string userFileSystemNewItemPath = Path.Combine(userFileSystemParentPath, newItemInfoExt.Name);
await virtualDrive.GetETagManager(userFileSystemNewItemPath).SetETagAsync(newItemInfoExt.ETag);
// Set the read-only attribute and all custom columns data.
UserFileSystemRawItem newUserFileSystemRawItem = virtualDrive.GetUserFileSystemRawItem(userFileSystemNewItemPath, logger);
await newUserFileSystemRawItem.SetLockedByAnotherUserAsync(newItemInfoExt.LockedByAnotherUser);
await newUserFileSystemRawItem.SetCustomColumnsDataAsync(newItemInfoExt.CustomProperties);
}
return(created);
}
}
catch (ExistsException ex)
{
// "Cannot create a file when that file already exists."
//await new UserFileSystemItem(userFileSystemParentPath).ShowDownloadErrorAsync(ex);
// Rethrow the exception preserving stack trace of the original exception.
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Capture(ex).Throw();
}
return(0);
}
/// <summary>
/// Creates instance of this class.
/// </summary>
/// <param name="userFileSystemPath">File or folder path in the user file system.</param>
/// <param name="logger">Logger.</param>
internal RemoteStorageRawItem(string userFileSystemPath, VirtualDriveBase virtualDrive, ILogger logger)
{
if (string.IsNullOrEmpty(userFileSystemPath))
{
throw new ArgumentNullException(nameof(userFileSystemPath));
}
this.virtualDrive = virtualDrive ?? throw new ArgumentNullException(nameof(virtualDrive));
this.logger = logger ?? throw new ArgumentNullException(nameof(logger));
this.userFileSystemPath = userFileSystemPath;
this.lockManager = virtualDrive.LockManager(userFileSystemPath, logger);
this.userFileSystemRawItem = virtualDrive.GetUserFileSystemRawItem(userFileSystemPath, logger);
}
/// <summary>
/// Recursively synchronizes all files and folders from server to client.
/// Synchronizes only folders already loaded into the user file system.
/// </summary>
/// <param name="userFileSystemFolderPath">Folder path in user file system.</param>
internal async Task SyncronizeFolderAsync(string userFileSystemFolderPath)
{
// In case of on-demand loading the user file system contains only a subset of the server files and folders.
// Here we sync folder only if its content already loaded into user file system (folder is not offline).
// The folder content is loaded inside IFolder.GetChildrenAsync() method.
if (new DirectoryInfo(userFileSystemFolderPath).Attributes.HasFlag(System.IO.FileAttributes.Offline))
{
// LogMessage("Folder offline, skipping:", userFileSystemFolderPath);
return;
}
IEnumerable <string> userFileSystemChildren = Directory.EnumerateFileSystemEntries(userFileSystemFolderPath, "*");
//LogMessage("Synchronizing:", userFileSystemFolderPath);
IVirtualFolder userFolder = await virtualDrive.GetItemAsync <IVirtualFolder>(userFileSystemFolderPath, this);
IEnumerable <FileSystemItemMetadataExt> remoteStorageChildrenItems = await userFolder.EnumerateChildrenAsync("*");
// Create new files/folders in the user file system.
foreach (FileSystemItemMetadataExt remoteStorageItem in remoteStorageChildrenItems)
{
string userFileSystemPath = Path.Combine(userFileSystemFolderPath, remoteStorageItem.Name);
try
{
// We do not want to sync MS Office temp files, etc. from remote storage.
// We also do not want to create MS Office files during transactional save in user file system.
if (!FsPath.AvoidSync(remoteStorageItem.Name) && !FsPath.AvoidSync(userFileSystemPath))
{
if (!FsPath.Exists(userFileSystemPath))
{
LogMessage($"Creating", userFileSystemPath);
await virtualDrive.GetUserFileSystemRawItem(userFileSystemFolderPath, this).CreateAsync(new[] { remoteStorageItem });
LogMessage($"Created succesefully", userFileSystemPath);
}
}
}
catch (Exception ex)
{
LogError("Creation failed", userFileSystemPath, null, ex);
}
}
// Update files/folders in user file system and sync subfolders.
userFileSystemChildren = Directory.EnumerateFileSystemEntries(userFileSystemFolderPath, "*");
foreach (string userFileSystemPath in userFileSystemChildren)
{
try
{
string itemName = Path.GetFileName(userFileSystemPath);
FileSystemItemMetadataExt remoteStorageItem = remoteStorageChildrenItems.FirstOrDefault(x => x.Name.Equals(itemName, StringComparison.InvariantCultureIgnoreCase));
if (!FsPath.AvoidSync(userFileSystemPath))
{
UserFileSystemRawItem userFileSystemRawItem = virtualDrive.GetUserFileSystemRawItem(userFileSystemPath, this);
if (remoteStorageItem == null)
{
if (PlaceholderItem.GetItem(userFileSystemPath).GetInSync()
//&& !PlaceholderItem.GetItem(userFileSystemPath).IsNew(virtualDrive) // Extra check to protect from deletion files that were deleted becuse of incorrect folder merging operation.
)
{
// Delete the file/folder in user file system.
LogMessage("Deleting item", userFileSystemPath);
await userFileSystemRawItem.DeleteAsync();
LogMessage("Deleted succesefully", userFileSystemPath);
}
}
else
{
if (PlaceholderItem.GetItem(userFileSystemPath).GetInSync() &&
!await virtualDrive.GetETagManager(userFileSystemPath).ETagEqualsAsync(remoteStorageItem))
{
// User file system <- remote storage update.
LogMessage("Remote item modified", userFileSystemPath);
await userFileSystemRawItem.UpdateAsync(remoteStorageItem);
LogMessage("Updated succesefully", userFileSystemPath);
}
// Set the read-only attribute and all custom columns data.
if (PlaceholderItem.GetItem(userFileSystemPath).GetInSync())
{
await userFileSystemRawItem.SetLockedByAnotherUserAsync(remoteStorageItem.LockedByAnotherUser);
await userFileSystemRawItem.SetCustomColumnsDataAsync(remoteStorageItem.CustomProperties);
}
// Hydrate / dehydrate the file.
if (userFileSystemRawItem.HydrationRequired())
{
LogMessage("Hydrating", userFileSystemPath);
try
{
new PlaceholderFile(userFileSystemPath).Hydrate(0, -1);
LogMessage("Hydrated succesefully", userFileSystemPath);
}
catch (FileLoadException)
{
// Typically this happens if another thread already hydrating the file.
LogMessage("Failed to hydrate. The file is blocked.", userFileSystemPath);
}
}
else if (userFileSystemRawItem.DehydrationRequired())
{
LogMessage("Dehydrating", userFileSystemPath);
new PlaceholderFile(userFileSystemPath).Dehydrate(0, -1);
LogMessage("Dehydrated succesefully", userFileSystemPath);
}
}
}
}
catch (Exception ex)
{
LogError("Update failed", userFileSystemPath, null, ex);
}
// Synchronize subfolders.
try
{
if (Directory.Exists(userFileSystemPath))
{
await SyncronizeFolderAsync(userFileSystemPath);
}
}
catch (Exception ex)
{
LogError("Folder sync failed:", userFileSystemPath, null, ex);
}
}
}