Get only files or only folders in a directory with Swiftydropbox

Shades

How would I go about to get a list with only files or only folders in a directory. As far as I know, I can get the metadata with the client.files.getMetaData, but that seems like a backwards way of doing it by first getting all files and then getting all metadata. Especially if I have basically two closures in each other to set for example an array to use as a datasource for a tableview.

Shades

For example, this won't work, since the completion will be called too early:

 

 

func getSubDirectory(path: String, completion: @escaping ([String]) -> ()) {
        var directories: [String] = []
        if let client = DropboxClientsManager.authorizedClient {
            client.files.listFolder(path: path).response { response, error in
                if let result = response {
                    print("Folder contents:")
                    for entry in result.entries {
                        client.files.getMetadata(path: (entry.pathLower)!).response { response, error in
                            if let metadata = response {
                                if let folder = metadata as? Files.FolderMetadata {
                                    print(folder.name)
                                    directories.append(folder.name)
                                }
                            }
                        }
                    }
                    completion(directories)
                } else {
                    print(error!)
                }
            }
        }
    }