prosappweb/lib/utils/time_of_day_extension.dart

import 'package:flutter/material.dart';

extension TimeOfDayExtension on TimeOfDay {
  TimeOfDay add({int hour = 0, int minute = 0}) {
    return replacing(hour: this.hour + hour, minute: this.minute + minute);
  }

  int compareTo(TimeOfDay other) {
    if (hour < other.hour) return -1;
    if (hour > other.hour) return 1;
    if (minute < other.minute) return -1;
    if (minute > other.minute) return 1;
    return 0;
  }

  bool isBefore(TimeOfDay other) {
    return compareTo(other) == -1;
  }
}