flutter - How to calculate every other weeks with DateTime?

Question

I have chat app. I want allow user message other user only every other week. For example:

• Week 1 (allowed
• Week 2 (not allowed)
• Week 3 (allowed)
• Week 4 (not allowed) ...

How I can do this? I want write conditional so can say:

if (allowedWeek) {
sendMessage
}

Maybe can use something like this?

DateTime.now().isAfter(X) && DateTime.now().isBefore(Y)

How I can tell DateTime this?

Answer 1

May be you can get week of the year by this package, week_of_year, and decide which week to talk which is not:

import 'package:week_of_year/week_of_year.dart';

void main() {
  final date = DateTime.now();
  print(date.weekOfYear); // Get the iso week of year
  print(date.ordinalDate); // Get the ordinal date
  print(date.isLeapYear); // Is this a leap year?
}