import 'package:flutter/material.dart';

void main() {
  runApp(const MainApp());
}

class MainApp extends StatelessWidget {
  const MainApp({super.key});

  @override
  Widget build(BuildContext context) {
    return const MaterialApp(
      home: MainPage(),
    );
  }
}

class Contact {
  final String address;
  final bool isOpen;

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

class MainPage extends StatelessWidget {
  const MainPage({super.key});

  final List<Contact> contacts = const [
    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),
  ];

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text("Contacts")),
      body: ListView.builder(
        itemCount: contacts.length,
        itemBuilder: (context, index) {
          final contact = contacts[index];
          return ContactTile(contact: contact);
        },
      ),
    );
  }
}

class ContactTile extends StatelessWidget {
  final Contact contact;

  const ContactTile({super.key, required this.contact});

  @override
  Widget build(BuildContext context) {
    return ListTile(
      leading: Icon(
        contact.isOpen ? Icons.meeting_room : Icons.door_front_door,
        color: contact.isOpen ? Colors.red : Colors.green,
      ),
      title: Text(contact.address),
    );
  }
}