GoRouter Setup

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import 'package:go_router/go_router.dart';
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final appRouter = GoRouter(
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  initialLocation: '/',
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  debugLogDiagnostics: true,
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  redirect: (context, state) {
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    final isLoggedIn = AuthService.isLoggedIn;
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    final isLoginRoute = state.matchedLocation == '/login';
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    if (!isLoggedIn && !isLoginRoute) return '/login';
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    if (isLoggedIn && isLoginRoute) return '/';
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    return null;
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  },
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  routes: [
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    GoRoute(
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      path: '/',
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      builder: (context, state) => const HomePage(),
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    ),
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    GoRoute(
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      path: '/login',
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      builder: (context, state) => const LoginPage(),
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    ),
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    ShellRoute(
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      builder: (context, state, child) => AppShell(child: child),
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      routes: [
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        GoRoute(
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          path: '/dashboard',
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          builder: (context, state) => const DashboardPage(),
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          routes: [
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            GoRoute(
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              path: 'settings',
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              builder: (context, state) => const SettingsPage(),
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            ),
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          ],
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        ),
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        GoRoute(
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          path: '/profile/:id',
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          builder: (context, state) {
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            final id = state.pathParameters['id']!;
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            return ProfilePage(userId: id);
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          },
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        ),
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      ],
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    ),
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  ],
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  errorBuilder: (context, state) => ErrorPage(error: state.error),
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);
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// Navigation helpers
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extension AppNavigation on BuildContext {
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  void goHome() => go('/');
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  void goLogin() => go('/login');
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  void goDashboard() => go('/dashboard');
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  void goProfile(String id) => go('/profile/$id');
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  void pushSettings() => push('/dashboard/settings');
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}