lib/data.dart


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import 'dart:async';

import 'package:flutter/foundation.dart';

class AppState with ChangeNotifier {
  List<Contact> contacts = <Contact>[
    Contact(address: "Living Room Window", isOpen: false),
    Contact(address: "Front Door", isOpen: true),
    Contact(address: "Back Door", isOpen: false),
    Contact(address: "Garage Window", isOpen: true),
  ];

  Timer? _timer;

  AppState() {
    _timer = Timer.periodic(const Duration(seconds: 1), (_) {
      toggleFirstContact();
    });
  }

  void toggleFirstContact() {
    if (contacts.isEmpty) {
      return;
    }

    contacts[0].isOpen = !contacts[0].isOpen;
    notifyListeners();
  }

  @override
  void dispose() {
    _timer?.cancel();
    super.dispose();
  }
}

class Contact {
  final String address;
  bool isOpen;

  Contact({required this.address, required this.isOpen});
}