FortnightPeriod constructor

Implementation

FortnightPeriod({required super.start, required super.end})
    : assert(
        end.difference(start) <=
            const Duration(
              days: 15,
              hours: 23,
              minutes: 59,
              seconds: 59,
              milliseconds: 999,
              microseconds: 999,
            ),
        'The difference between start and end must be 15 days, 23 hours, '
        '59 minutes, 59 seconds, 999 milliseconds and 999 microseconds',
      ) {
  if ((duration > const Duration(days: 16, hours: 1)) ||
      (duration <
          const Duration(
            days: 12,
            hours: 22,
            minutes: 59,
            seconds: 59,
            milliseconds: 999,
            microseconds: 999,
          )) ||
      (start.exactTimeOfDay != Duration.zero) ||
      (end.exactTimeOfDay != end.endOfDay.exactTimeOfDay) ||
      !start.isAtSameMonthAs(end) ||
      ((start.firstDayOfMonth != start) &&
          (start != start.copyWith(day: 16))) ||
      ((end.lastDayOfMonth.endOfDay != end) &&
          (end != end.copyWith(day: 15).endOfDay))) {
    throw ArgumentError.value(
      end,
      'end',
      'End must be at the same fortnight as start and must be the last '
          'microsecond of the fortnight',
    );
  }
}