IFolder Interface

public interface IFolder : IFileSystemItem

Public Interface IFolder
	Inherits IFileSystemItem

public interface class IFolder : IFileSystemItem

type IFolder =  
    interface
        interface IFileSystemItem
    end

internal class VfsFolder : VfsFileSystemItem, IFolder
{
    public VfsFolder(string path, ILogger logger, VfsEngine engine) : base(path, logger, engine)
    {

    }

    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($"IFolder.GetChildrenAsync({pattern})", UserFileSystemPath);

        IEnumerable<FileSystemItemBasicInfo> children = await new UserFolder(UserFileSystemPath).EnumerateChildrenAsync(pattern);

        // Filtering existing files/folders. This is only required to avoid extra errors in the log.
        List<IFileSystemItemBasicInfo> newChildren = new List<IFileSystemItemBasicInfo>();
        foreach (IFileSystemItemBasicInfo child in children)
        {
            string userFileSystemItemPath = Path.Combine(UserFileSystemPath, child.Name);
            if (!FsPath.Exists(userFileSystemItemPath))
            {
                Logger.LogMessage("Creating", child.Name);
                newChildren.Add(child);
            }
        }

        // To signal that the children enumeration is completed 
        // always call ReturnChildren(), even if the folder is empty.
        resultContext.ReturnChildren(newChildren.ToArray(), newChildren.Count());


        // Create ETags.
        // 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.
        foreach (FileSystemItemBasicInfo child in children)
        {
            string userFileSystemItemPath = Path.Combine(UserFileSystemPath, child.Name);
            await ETag.SetETagAsync(userFileSystemItemPath, child.ETag);
        }
    }
}

internal class VfsFolder : VfsFileSystemItem, IFolder
{
    public VfsFolder(string path, ILogger logger, VfsEngine engine) : base(path, logger, engine)
    {

    }

    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($"IFolder.GetChildrenAsync({pattern})", UserFileSystemPath);

        IEnumerable<FileSystemItemBasicInfo> children = await new UserFolder(UserFileSystemPath).EnumerateChildrenAsync(pattern);

        // Filtering existing files/folders. This is only required to avoid extra errors in the log.
        List<IFileSystemItemBasicInfo> newChildren = new List<IFileSystemItemBasicInfo>();
        foreach (IFileSystemItemBasicInfo child in children)
        {
            string userFileSystemItemPath = Path.Combine(UserFileSystemPath, child.Name);
            if (!FsPath.Exists(userFileSystemItemPath))
            {
                Logger.LogMessage("Creating", child.Name);
                newChildren.Add(child);
            }
        }

        // To signal that the children enumeration is completed 
        // always call ReturnChildren(), even if the folder is empty.
        resultContext.ReturnChildren(newChildren.ToArray(), newChildren.Count());


        // Save ETags and set "locked by another user" icon.
        foreach (FileSystemItemBasicInfo child in children)
        {
            string userFileSystemItemPath = Path.Combine(UserFileSystemPath, child.Name);

            // Create ETags.
            // 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.
            ETag.SetETagAsync(userFileSystemItemPath, child.ETag);

            // Set the lock icon and read-only attribute, to indicate that the item is locked by another user.
            new UserFileSystemRawItem(userFileSystemItemPath).SetLockedByAnotherUserAsync(child.LockedByAnotherUser);
        }
    }
}