of method

Implementation

@override
TrimesterPeriod of(DateTime date) {
  final octoberFirst = date.copyWith(month: DateTime.october, day: 1).date;
  if (date.isBefore(octoberFirst)) {
    final julyFirst = date.copyWith(month: DateTime.july, day: 1).date;
    if (date.isBefore(julyFirst)) {
      final aprilFirst = date.copyWith(month: DateTime.april, day: 1).date;
      if (date.isBefore(aprilFirst)) {
        return TrimesterPeriod(
          start: date.firstDayOfYear.date,
          end: aprilFirst.subtract(const Duration(microseconds: 1)),
        );
      }
      return TrimesterPeriod(
        start: aprilFirst,
        end: julyFirst.subtract(const Duration(microseconds: 1)),
      );
    }
    return TrimesterPeriod(
      start: julyFirst,
      end: octoberFirst.subtract(const Duration(microseconds: 1)),
    );
  }
  return TrimesterPeriod(
    start: octoberFirst,
    end: date.lastDayOfYear.endOfDay,
  );
}