/// <inheritdoc/>
public async Task GetChildrenAsync(string pattern, IOperationContext operationContext, IFolderListingResultContext resultContext)
{
// This method has a 60 sec timeout.
// To process longer requests and reset the timout timer call one of the following:
// - resultContext.ReturnChildren() method.
// - resultContext.ReportProgress() method.
Logger.LogMessage($"{nameof(IFolder)}.{nameof(GetChildrenAsync)}({pattern})", UserFileSystemPath);
IHierarchyItemAsync[] remoteStorageChildren = null;
// Retry the request in case the log-in dialog is shown.
try
{
remoteStorageChildren = await Program.DavClient.GetChildrenAsync(new Uri(RemoteStoragePath), false);
}
catch (ITHit.WebDAV.Client.Exceptions.Redirect302Exception)
{
remoteStorageChildren = await Program.DavClient.GetChildrenAsync(new Uri(RemoteStoragePath), false);
}
List <FileSystemItemMetadataExt> userFileSystemChildren = new List <FileSystemItemMetadataExt>();
foreach (IHierarchyItemAsync remoteStorageItem in remoteStorageChildren)
{
FileSystemItemMetadataExt itemInfo = Mapping.GetUserFileSystemItemMetadata(remoteStorageItem);
string userFileSystemItemPath = Path.Combine(UserFileSystemPath, itemInfo.Name);
// Filtering existing files/folders. This is only required to avoid extra errors in the log.
if (!FsPath.Exists(userFileSystemItemPath))
{
Logger.LogMessage("Creating", userFileSystemItemPath);
userFileSystemChildren.Add(itemInfo);
}
ExternalDataManager customDataManager = Engine.CustomDataManager(userFileSystemItemPath);
// Mark this item as not new, which is required for correct MS Office saving opertions.
customDataManager.IsNew = false;
}
// To signal that the children enumeration is completed
// always call ReturnChildren(), even if the folder is empty.
resultContext.ReturnChildren(userFileSystemChildren.ToArray(), userFileSystemChildren.Count());
// Save ETags, the read-only attribute and all custom columns data.
foreach (FileSystemItemMetadataExt child in userFileSystemChildren)
{
string userFileSystemItemPath = Path.Combine(UserFileSystemPath, child.Name);
ExternalDataManager customDataManager = Engine.CustomDataManager(userFileSystemItemPath);
// Save ETag on the client side, to be sent to the remote storage as part of the update.
// Setting ETag also marks an item as not new.
// ETags must correspond with a server file/folder, NOT with a client placeholder.
// It should NOT be moved/deleted/updated when a placeholder in the user file system is moved/deleted/updated.
// It should be moved/deleted when a file/folder in the remote storage is moved/deleted.
await customDataManager.ETagManager.SetETagAsync(child.ETag);
// Set the read-only attribute and all custom columns data.
await customDataManager.SetLockedByAnotherUserAsync(child.LockedByAnotherUser);
await customDataManager.SetCustomColumnsAsync(child.CustomProperties);
}
}
/// <summary>
/// Creates instance of this class.
/// </summary>
/// <param name="userFileSystemPath">Path of this file of folder in the user file system.</param>
/// <param name="logger">Logger.</param>
public VirtualFileSystemItem(string userFileSystemPath, ILogger logger)
{
this.UserFileSystemPath = userFileSystemPath;
this.RemoteStorageUri = Mapping.MapPath(userFileSystemPath);
this.Logger = logger;
}