toDuration method

Duration toDuration()

Implementation

Duration toDuration() {
  if (!RegExp(
          r"^(-|\+)?P(?:([-+]?[0-9,.]*)Y)?(?:([-+]?[0-9,.]*)M)?(?:([-+]?[0-9,.]*)W)?(?:([-+]?[0-9,.]*)D)?(?:T(?:([-+]?[0-9,.]*)H)?(?:([-+]?[0-9,.]*)M)?(?:([-+]?[0-9,.]*)S)?)?$")
      .hasMatch(this)) {
    throw ArgumentError("String does not follow correct format");
  }

  final weeks = _parseTime(this, "W");
  final days = _parseTime(this, "D");
  final hours = _parseTime(this, "H");
  final minutes = _parseTime(this, "M");
  final seconds = _parseTime(this, "S");

  return Duration(
    days: days + (weeks * 7),
    hours: hours,
    minutes: minutes,
    seconds: seconds,
  );
}