Search code examples
datedartcountdown

Dart get date of next friday

Im trying to make an app that counts down the time untill the next friday, but therefore I need the date of the next friday. Any help is deeply appreciated!

Solution

  • Solution

    extension DateTimeExtension on DateTime {
  DateTime next(int day) {
    return this.add(
      Duration(
        days: (day - this.weekday) % DateTime.daysPerWeek,
      ),
    );
  }
}

    Testing

    void main() {
  var today = DateTime.now();
  print(today);
 
  print(today.next(DateTime.friday));
  print(today.next(DateTime.friday).weekday == DateTime.friday);
  
  // Works as expected when the next day is after sunday
  print(today.next(DateTime.monday));
  print(today.next(DateTime.monday).weekday == DateTime.monday);
}

    Output

    2020-06-24 18:47:40.318
2020-06-26 18:47:40.318
true
2020-06-29 18:47:40.318
true

    See this for more information on DateTime.