kgleong

func getFolderID(
    name: String,
    service: GTLRDriveService,
    user: GIDGoogleUser,
    completion: @escaping (String?) -> Void) {
    
    let query = GTLRDriveQuery_FilesList.query()

    // Comma-separated list of areas the search applies to. E.g., appDataFolder, photos, drive.
    query.spaces = "drive"

kgleong

func createFolder(
    name: String,
    service: GTLRDriveService,
    completion: @escaping (String) -> Void) {
    
    let folder = GTLRDrive_File()
    folder.mimeType = "application/vnd.google-apps.folder"
    folder.name = name
    
    // Google Drive folders are files with a special MIME-type.

kgleong

func uploadFile(
    name: String,
    folderID: String,
    fileURL: URL,
    mimeType: String,
    service: GTLRDriveService) {
    
    let file = GTLRDrive_File()
    file.name = name
    file.parents = [folderID]