/// <summary>
        /// Called when this folder is being copied.
        /// </summary>
        /// <param name="destFolder">Destination parent folder.</param>
        /// <param name="destName">New folder name.</param>
        /// <param name="deep">Whether children items shall be copied.</param>
        /// <param name="multistatus">Information about child items that failed to copy.</param>
        public override async Task CopyToAsync(IItemCollectionAsync destFolder, string destName, bool deep, MultistatusException multistatus)
        {
            if (!(destFolder is DavFolder))
            {
                throw new DavException("Target folder doesn't exist", DavStatus.CONFLICT);
            }
            DavFolder targetFolder = (DavFolder)destFolder;

            if (IsRecursive(targetFolder))
            {
                throw new DavException("Cannot copy to subfolder", DavStatus.FORBIDDEN);
            }

            // string newDirLocalPath = System.IO.Path.Combine(targetFolder.FullPath, destName);
            string targetPath = targetFolder.Path + EncodeUtil.EncodeUrlPart(destName);

            // Create folder at the destination.
            try
            {
                if (!await context.DataLakeStoreService.ExistsAsync(targetPath))
                {
                    await targetFolder.CreateFolderAsync(destName);
                }
            }
            catch (DavException ex)
            {
                // Continue, but report error to client for the target item.
                multistatus.AddInnerException(targetPath, ex);
            }

            // Copy children.
            IFolderAsync createdFolder = (IFolderAsync)await context.GetHierarchyItemAsync(targetPath);

            foreach (DavHierarchyItem item in (await GetChildrenAsync(new PropertyName[0], null, null, new List <OrderProperty>())).Page)
            {
                if (!deep && item is DavFolder)
                {
                    continue;
                }
                try
                {
                    await item.CopyToAsync(createdFolder, item.Name, deep, multistatus);
                }
                catch (DavException ex)
                {
                    // If a child item failed to copy we continue but report error to client.
                    multistatus.AddInnerException(item.Path, ex);
                }
            }
            await context.socketService.NotifyRefreshAsync(targetFolder.Path);
        }
        /// <summary>
        /// Called when this folder is being moved or renamed.
        /// </summary>
        /// <param name="destFolder">Destination folder.</param>
        /// <param name="destName">New name of this folder.</param>
        /// <param name="multistatus">Information about child items that failed to move.</param>
        public override async Task MoveToAsync(IItemCollectionAsync destFolder, string destName, MultistatusException multistatus)
        {
            await RequireHasTokenAsync();

            if (!(destFolder is DavFolder))
            {
                throw new DavException("Target folder doesn't exist", DavStatus.CONFLICT);
            }
            DavFolder targetFolder = (DavFolder)destFolder;

            if (IsRecursive(targetFolder))
            {
                throw new DavException("Cannot move folder to its subtree.", DavStatus.FORBIDDEN);
            }

            // string newDirPath = System.IO.Path.Combine(targetFolder.FullPath, destName);
            string targetPath = targetFolder.Path + EncodeUtil.EncodeUrlPart(destName);

            //
            try
            {
                // Remove item with the same name at destination if it exists.
                IHierarchyItemAsync item = await context.GetHierarchyItemAsync(targetPath);

                if (item != null)
                {
                    await item.DeleteAsync(multistatus);
                }

                await targetFolder.CreateFolderAsync(destName);
            }
            catch (DavException ex)
            {
                // Continue the operation but report error with destination path to client.
                multistatus.AddInnerException(targetPath, ex);
                return;
            }

            // Move child items.
            bool         movedSuccessfully = true;
            IFolderAsync createdFolder     = (IFolderAsync)await context.GetHierarchyItemAsync(targetPath);

            foreach (DavHierarchyItem item in (await GetChildrenAsync(new PropertyName[0], null, null, new List <OrderProperty>())).Page)
            {
                try
                {
                    await item.MoveToAsync(createdFolder, item.Name, multistatus);
                }
                catch (DavException ex)
                {
                    // Continue the operation but report error with child item to client.
                    multistatus.AddInnerException(item.Path, ex);
                    movedSuccessfully = false;
                }
            }

            if (movedSuccessfully)
            {
                await DeleteAsync(multistatus);
            }
            // Refresh client UI.
            await context.socketService.NotifyDeleteAsync(Path);

            await context.socketService.NotifyRefreshAsync(GetParentPath(targetPath));
        }