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});
}