extension DurationFormat on Duration {
  /// formats the duration of the book as `10h 30m`
  ///
  /// will add up all the durations of the audio files first
  /// then convert them to the given format
  String get formattedBinary {
    final hours = inHours;
    final minutes = inMinutes.remainder(60);
    return '${hours}h ${minutes}m';
  }
}

extension OnlyTime on DateTime {
  // in format HH:MM:ss
  // padding with 0
  String get time =>
      '${hour.toString().padLeft(2, '0')}:${minute.toString().padLeft(2, '0')}:${second.toString().padLeft(2, '0')}';
}