main.dart

import 'package:flutter/material.dart';

void main() => runApp(const MyApp());

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

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Web3 News',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        colorSchemeSeed: Colors.indigo,
      ),
      home: const NewsPage(),
    );
  }
}

class NewsPage extends StatefulWidget {
  const NewsPage({super.key});

  @override
  State<NewsPage> createState() => _NewsPageState();
}

class _NewsPageState extends State<NewsPage> {
  int _currentIndex = 0;
  List<Community> _communities = [
    Community(name: 'Blockchain', content: 'Blockchain news'),
    Community(name: 'DeFi', content: 'DeFi news'),
    Community(name: 'NFT', content: 'NFT news'),
  ];

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Web3 News'),
        bottom: TabBar(
          onTap: (index) {
            setState(() {
              _currentIndex = index;
            });
          },
          tabs: _communities.map((community) => Tab(text: community.name)).toList(),
        ),
      ),
      body: GridView.count(
        crossAxisCount: 2,
        childAspectRatio: 3,
        children: _communities[_currentIndex].newsItems,
      ),
    );
  }
}

class Community {
  final String name;
  final String content;
  final List<NewsItem> newsItems;

  Community({required this.name, required this.content, newsItems})
      : newsItems = newsItems ?? [
          NewsItem(title: 'News 1', content: 'This is news 1'),
          NewsItem(title: 'News 2', content: 'This is news 2'),
          NewsItem(title: 'News 3', content: 'This is news 3'),
        ];
}

class NewsItem {
  final String title;
  final String content;

  NewsItem({required this.title, required this.content});
}