Flutter/Dart - Range of Dates for today, current week, current month and current year in Shamsi/Persian/Jalali Calendar using shamsi_date package.

DartGist6.dart

//First you need install shamsi_date package from pub.dev and then import it.
import 'package:shamsi_date/shamsi_date.dart';

void main (){
  final JalaliRange todayRange =
      JalaliRange(start: Jalali.now(), end: Jalali.now());

  //Shamsi_date package doesn't support .add and .subtract (since this version)
  //So we use DateTime and convert it to Jalali
  final JalaliRange thisWeekRange = JalaliRange(
      start: Jalali.fromDateTime(
          DateTime.now().subtract(Duration(days: DateTime.now().weekday + 1))),
      end: Jalali.fromDateTime(DateTime.now().add(
          Duration(days: DateTime.daysPerWeek - DateTime.now().weekday - 2))));

  final JalaliRange thisMonthRange = JalaliRange(
      start: Jalali(Jalali.now().year, Jalali.now().month, 1),
      end: Jalali(
          Jalali.now().year, Jalali.now().month, Jalali.now().monthLength));

  final JalaliRange thisYearRange = JalaliRange(
      start: Jalali(Jalali.now().year, 1, 1),
      end: Jalali(
          Jalali.now().year, 12, Jalali(Jalali.now().year, 12).monthLength));
}