SpotiFLAC-Mobile/lib/screens/main_shell.dart

import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:spotiflac_android/providers/download_queue_provider.dart';
import 'package:spotiflac_android/screens/home_tab.dart';
import 'package:spotiflac_android/screens/queue_tab.dart';
import 'package:spotiflac_android/screens/settings_tab.dart';

class MainShell extends ConsumerStatefulWidget {
  const MainShell({super.key});

  @override
  ConsumerState<MainShell> createState() => _MainShellState();
}

class _MainShellState extends ConsumerState<MainShell> {
  int _currentIndex = 0;
  late PageController _pageController;

  @override
  void initState() {
    super.initState();
    _pageController = PageController(initialPage: _currentIndex);
  }

  @override
  void dispose() {
    _pageController.dispose();
    super.dispose();
  }

  void _onNavTap(int index) {
    setState(() => _currentIndex = index);
    _pageController.animateToPage(
      index,
      duration: const Duration(milliseconds: 300),
      curve: Curves.easeInOut,
    );
  }

  void _onPageChanged(int index) {
    setState(() => _currentIndex = index);
  }

  @override
  Widget build(BuildContext context) {
    final queueState = ref.watch(downloadQueueProvider);

    return Scaffold(
      appBar: AppBar(
        leading: Padding(
          padding: const EdgeInsets.all(8.0),
          child: ClipRRect(
            borderRadius: BorderRadius.circular(20),
            child: Image.asset(
              'assets/images/logo.png',
              width: 40,
              height: 40,
            ),
          ),
        ),
        title: const Text('SpotiFLAC'),
      ),
      body: PageView(
        controller: _pageController,
        onPageChanged: _onPageChanged,
        physics: const BouncingScrollPhysics(),
        children: const [
          HomeTab(),
          QueueTab(),
          SettingsTab(),
        ],
      ),
      bottomNavigationBar: NavigationBar(
        selectedIndex: _currentIndex,
        onDestinationSelected: _onNavTap,
        animationDuration: const Duration(milliseconds: 300),
        destinations: [
          const NavigationDestination(
            icon: Icon(Icons.home_outlined),
            selectedIcon: Icon(Icons.home),
            label: 'Home',
          ),
          NavigationDestination(
            icon: Badge(
              isLabelVisible: queueState.queuedCount > 0,
              label: Text('${queueState.queuedCount}'),
              child: const Icon(Icons.download_outlined),
            ),
            selectedIcon: Badge(
              isLabelVisible: queueState.queuedCount > 0,
              label: Text('${queueState.queuedCount}'),
              child: const Icon(Icons.download),
            ),
            label: 'Downloads',
          ),
          const NavigationDestination(
            icon: Icon(Icons.settings_outlined),
            selectedIcon: Icon(Icons.settings),
            label: 'Settings',
          ),
        ],
      ),
    );
  }
}