ioutils.dart

  static Future<String> get _photoLibrary async {
    final base = await getApplicationDocumentsDirectory();
    final directory =
        await Directory("${base.path}/images/").create(recursive: true);
    return directory.path;
  }

  static Future<File> getFile(String name) async {
    final path = await _photoLibrary;
    return File('$path/$name');
  }

  static Future<File> copyFile(File src, File dest) async {
    return src.copySync(dest.path);
  }