cpd_2022_zi/lib/providers/timer_provider.dart

import 'dart:async';

import 'package:flutter/material.dart';

class TimerProvider extends ChangeNotifier {
  Timer? _timer;
  bool started = false;
  int get elapsedSeconds => _timer != null ? _timer!.tick : 0;

  void startTimer(Duration duration) {
    print('started');
    started = true;
    _timer = Timer.periodic(const Duration(seconds: 1), ((timer) {
      if (timer.tick >= duration.inSeconds) {
        timer.cancel();
        started = false;
      }
      notifyListeners();
    }));
  }

  void stopTimer() {
    started = false;
    _timer?.cancel();
    _timer = null;
  }

  @override
  void dispose() {
    print('disposed');
    started = false;
    _timer?.cancel();
    _timer = null;
    super.dispose();
  }
}