/// <summary>
/// Sets or removes icon.
/// </summary>
/// <param name="set">True to display the icon. False - to remove the icon.</param>
private async Task SetIconAsync(bool set, int id, string iconFile = null, string description = null)
{
if (set)
{
string iconFilePath = Path.Combine(iconsFolderPath, iconFile);
FileSystemItemPropertyData propData = new FileSystemItemPropertyData((int)id, description, iconFilePath);
await SetCustomColumnsAsync(new [] { propData });
}
else
{
FileSystemItemPropertyData propData = new FileSystemItemPropertyData((int)id, null);
await RemoveCustomColumnsAsync(new [] { propData });
}
}
/// <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);
IEnumerable <FileSystemInfo> remoteStorageChildren = new DirectoryInfo(RemoteStoragePath).EnumerateFileSystemInfos(pattern);
List <IFileSystemItemMetadata> userFileSystemChildren = new List <IFileSystemItemMetadata>();
foreach (FileSystemInfo remoteStorageItem in remoteStorageChildren)
{
IFileSystemItemMetadata itemInfo = Mapping.GetUserFileSysteItemMetadata(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;
// Save ETag on the client side, to be sent to the remote storage as part of the update.
await customDataManager.ETagManager.SetETagAsync("1234567890");
}
// To signal that the children enumeration is completed
// always call ReturnChildren(), even if the folder is empty.
resultContext.ReturnChildren(userFileSystemChildren.ToArray(), userFileSystemChildren.Count());
// Show some custom column in file manager for demo purposes.
foreach (IFileSystemItemMetadata itemInfo in userFileSystemChildren)
{
string userFileSystemItemPath = Path.Combine(UserFileSystemPath, itemInfo.Name);
FileSystemItemPropertyData eTagColumn = new FileSystemItemPropertyData((int)CustomColumnIds.ETag, "1234567890");
await Engine.CustomDataManager(userFileSystemItemPath).SetCustomColumnsAsync(new [] { eTagColumn });
}
}
