I'll continue with the remaining files for the Flutter delivery app. Here's the comprehensive solution: import 'package:flutter/material.dart'; import 'package:provider/provider.dart'; import '../../providers/auth_provider.dart'; import '../../widgets/custom_text_field.dart'; class LoginScreen extends StatefulWidget { const LoginScreen({Key? key}) : super(key: key); @override State createState() => _LoginScreenState(); } class _LoginScreenState extends State { final _formKey = GlobalKey(); final _emailController = TextEditingController(); final _passwordController = TextEditingController(); bool _isLoading = false; bool _obscureText = true; @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar(title: const Text('Login')), body: Padding( padding: const EdgeInsets.all(16.0), child: Form( key: _formKey, child: Column( children: [ CustomTextField( controller: _emailController, label: 'Email', validator: (value) { if (value == null || value.isEmpty) { return 'Please enter your email'; } if (!value.contains('@')) { return 'Please enter a valid email'; } return null; }, ), const SizedBox(height: 16), CustomTextField( controller: _passwordController, label: 'Password', obscureText: _obscureText, suffixIcon: IconButton( icon: Icon( _obscureText ? Icons.visibility : Icons.visibility_off, ), onPressed: () { setState(() { _obscureText = !_obscureText; }); }, ), validator: (value) { if (value == null || value.isEmpty) { return 'Please enter your password'; } if (value.length < 6) { return 'Password must be at least 6 characters'; } return null; }, ), const SizedBox(height: 24), ElevatedButton( onPressed: _isLoading ? null : _login, child: _isLoading ? const CircularProgressIndicator() : const Text('Login'), ), TextButton( onPressed: () { Navigator.pushNamed(context, '/signup'); }, child: const Text('Create an account'), ), ], ), ), ), ); } Future _login() async { if (!_formKey.currentState!.validate()) return; setState(() => _isLoading = true); try { await Provider.of(context, listen: false).signInWithEmailAndPassword( _emailController.text.trim(), _passwordController.text.trim(), ); _navigateBasedOnRole(); } catch (e) { ScaffoldMessenger.of(context).showSnackBar( SnackBar(content: Text('Login failed: ${e.toString()}')), ); } finally { setState(() => _isLoading = false); } } void _navigateBasedOnRole() { final user = Provider.of(context, listen: false).user; if (user?.role == 'admin') { Navigator.pushReplacementNamed(context, '/admin/dashboard'); } else { Navigator.pushReplacementNamed(context, '/user/home'); } } @override void dispose() { _emailController.dispose(); _passwordController.dispose(); super.dispose(); } } import 'package:flutter/material.dart'; import 'package:provider/provider.dart'; import '../../providers/auth_provider.dart'; import '../../widgets/custom_text_field.dart'; class SignupScreen extends StatefulWidget { const SignupScreen({Key? key}) : super(key: key); @override State createState() => _SignupScreenState(); } class _SignupScreenState extends State { final _formKey = GlobalKey(); final _emailController = TextEditingController(); final _passwordController = TextEditingController(); final _nameController = TextEditingController(); final _roleController = TextEditingController(text: 'user'); bool _isLoading = false; bool _obscureText = true; @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar(title: const Text('Sign Up')), body: Padding( padding: const EdgeInsets.all(16.0), child: Form( key: _formKey, child: Column( children: [ CustomTextField( controller: _nameController, label: 'Full Name', validator: (value) { if (value == null || value.isEmpty) { return 'Please enter your name'; } return null; }, ), const SizedBox(height: 16), CustomTextField( controller: _emailController, label: 'Email', validator: (value) { if (value == null || value.isEmpty) { return 'Please enter your email'; } if (!value.contains('@')) { return 'Please enter a valid email'; } return null; }, ), const SizedBox(height: 16), CustomTextField( controller: _passwordController, label: 'Password', obscureText: _obscureText, suffixIcon: IconButton( icon: Icon( _obscureText ? Icons.visibility : Icons.visibility_off, ), onPressed: () { setState(() { _obscureText = !_obscureText; }); }, ), validator: (value) { if (value == null || value.isEmpty) { return 'Please enter your password'; } if (value.length < 6) { return 'Password must be at least 6 characters'; } return null; }, ), const SizedBox(height: 16), DropdownButtonFormField( value: _roleController.text, items: const [ DropdownMenuItem(value: 'user', child: Text('User')), DropdownMenuItem(value: 'admin', child: Text('Admin')), ], onChanged: (value) { setState(() { _roleController.text = value!; }); }, decoration: const InputDecoration( labelText: 'Role', border: OutlineInputBorder(), ), ), const SizedBox(height: 24), ElevatedButton( onPressed: _isLoading ? null : _signup, child: _isLoading ? const CircularProgressIndicator() : const Text('Sign Up'), ), TextButton( onPressed: () { Navigator.pushNamed(context, '/login'); }, child: const Text('Already have an account? Login'), ), ], ), ), ), ); } Future _signup() async { if (!_formKey.currentState!.validate()) return; setState(() => _isLoading = true); try { await Provider.of(context, listen: false).signUpWithEmailAndPassword( _emailController.text.trim(), _passwordController.text.trim(), _nameController.text.trim(), _roleController.text.trim(), ); _navigateBasedOnRole(); } catch (e) { ScaffoldMessenger.of(context).showSnackBar( SnackBar(content: Text('Signup failed: ${e.toString()}')), ); } finally { setState(() => _isLoading = false); } } void _navigateBasedOnRole() { final user = Provider.of(context, listen: false).user; if (user?.role == 'admin') { Navigator.pushReplacementNamed(context, '/admin/dashboard'); } else { Navigator.pushReplacementNamed(context, '/user/home'); } } @override void dispose() { _emailController.dispose(); _passwordController.dispose(); _nameController.dispose(); _roleController.dispose(); super.dispose(); } } import 'package:flutter/material.dart'; import 'package:provider/provider.dart'; import '../../providers/auth_provider.dart'; class UserHomeScreen extends StatelessWidget { const UserHomeScreen({Key? key}) : super(key: key); @override Widget build(BuildContext context) { final user = Provider.of(context).user; return Scaffold( appBar: AppBar( title: const Text('Home'), actions: [ IconButton( icon: const Icon(Icons.logout), onPressed: () { Provider.of(context, listen: false).signOut(); Navigator.pushReplacementNamed(context, '/login'); }, ), ], ), body: Center( child: Column( mainAxisAlignment: MainAxisAlignment.center, children: [ Text('Welcome, ${user?.name ?? 'User'}'), const SizedBox(height: 20), ElevatedButton( onPressed: () { Navigator.pushNamed(context, '/user/place-order'); }, child: const Text('Place New Order'), ), const SizedBox(height: 20), ElevatedButton( onPressed: () { Navigator.pushNamed(context, '/user/orders'); }, child: const Text('My Orders'), ), ], ), ), ); } } import 'package:flutter/material.dart'; import 'package:provider/provider.dart'; import '../../providers/auth_provider.dart'; class AdminDashboardScreen extends StatelessWidget { const AdminDashboardScreen({Key? key}) : super(key: key); @override Widget build(BuildContext context) { final user = Provider.of(context).user; return Scaffold( appBar: AppBar( title: const Text('Admin Dashboard'), actions: [ IconButton( icon: const Icon(Icons.logout), onPressed: () { Provider.of(context, listen: false).signOut(); Navigator.pushReplacementNamed(context, '/login'); }, ), ], ), body: Center( child: Column( mainAxisAlignment: MainAxisAlignment.center, children: [ Text('Welcome Admin, ${user?.name ?? ''}'), const SizedBox(height: 20), ElevatedButton( onPressed: () { Navigator.pushNamed(context, '/admin/orders'); }, child: const Text('Manage Orders'), ), ], ), ), ); } } import 'package:flutter/material.dart'; import 'package:provider/provider.dart'; import '../../models/order_model.dart'; import '../../services/order_service.dart'; class PlaceOrderScreen extends StatefulWidget { const PlaceOrderScreen({Key? key}) : super(key: key); @override State createState() => _PlaceOrderScreenState(); } class _PlaceOrderScreenState extends State { final _formKey = GlobalKey(); final _addressController = TextEditingController(); final List> _items = []; bool _isLoading = false; @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar(title: const Text('Place Order')), body: Padding( padding: const EdgeInsets.all(16.0), child: Form( key: _formKey, child: Column( children: [ TextFormField( controller: _addressController, decoration: const InputDecoration(labelText: 'Delivery Address'), validator: (value) { if (value == null || value.isEmpty) { return 'Please enter delivery address'; } return null; }, ), const SizedBox(height: 20), const Text('Items:', style: TextStyle(fontSize: 18)), ..._items.map((item) => ListTile( title: Text(item['name']), subtitle: Text('\$${item['price']} x ${item['quantity']}'), trailing: IconButton( icon: const Icon(Icons.delete), onPressed: () { setState(() { _items.remove(item); }); }, ), )), ElevatedButton( onPressed: _addItem, child: const Text('Add Item'), ), const SizedBox(height: 20), ElevatedButton( onPressed: _isLoading ? null : _placeOrder, child: _isLoading ? const CircularProgressIndicator() : const Text('Place Order'), ), ], ), ), ), ); } void _addItem() { showDialog( context: context, builder: (context) => AlertDialog( title: const Text('Add Item'), content: Column( mainAxisSize: MainAxisSize.min, children: [ TextFormField( decoration: const InputDecoration(labelText: 'Item Name'), onChanged: (value) => _currentItem['name'] = value, ), TextFormField( decoration: const InputDecoration(labelText: 'Price'), keyboardType: TextInputType.number, onChanged: (value) => _currentItem['price'] = double.parse(value), ), TextFormField( decoration: const InputDecoration(labelText: 'Quantity'), keyboardType: TextInputType.number, onChanged: (value) => _currentItem['quantity'] = int.parse(value), ), ], ), actions: [ TextButton( onPressed: () => Navigator.pop(context), child: const Text('Cancel'), ), TextButton( onPressed: () { setState(() { _items.add(Map.from(_currentItem)); _currentItem.clear(); }); Navigator.pop(context); }, child: const Text('Add'), ), ], ), ); } final Map _currentItem = {}; Future _placeOrder() async { if (!_formKey.currentState!.validate() || _items.isEmpty) { ScaffoldMessenger.of(context).showSnackBar( const SnackBar(content: Text('Please add at least one item and provide address')), ); return; } setState(() => _isLoading = true); try { final order = OrderModel( id: DateTime.now().millisecondsSinceEpoch.toString(), userId: Provider.of(context, listen: false).user!.uid, items: _items, totalPrice: _items.fold(0.0, (sum, item) => sum + (item['price'] * item['quantity'])), status: 'pending', createdAt: DateTime.now(), deliveryAddress: _addressController.text, ); await OrderService().placeOrder(order); Navigator.pop(context); } catch (e) { ScaffoldMessenger.of(context).showSnackBar( SnackBar(content: Text('Failed to place order: ${e.toString()}')), ); } finally { setState(() => _isLoading = false); } } @override void dispose() { _addressController.dispose(); super.dispose(); } } import 'package:flutter/material.dart'; import 'package:provider/provider.dart'; import 'package:cloud_firestore/cloud_firestore.dart'; import '../../models/order_model.dart'; import '../../providers/auth_provider.dart'; class MyOrdersScreen extends StatelessWidget { const MyOrdersScreen({Key? key}) : super(key: key); @override Widget build(BuildContext context) { final userId = Provider.of(context).user?.uid; if (userId == null) { return const Scaffold( body: Center(child: Text('User not authenticated')), ); } return Scaffold( appBar: AppBar(title: const Text('My Orders')), body: StreamBuilder( stream: FirebaseFirestore.instance .collection('orders') .where('userId', isEqualTo: userId) .orderBy('createdAt', descending: true) .snapshots(), builder: (context, snapshot) { if (snapshot.hasError) { return Center(child: Text('Error: ${snapshot.error}')); } if (snapshot.connectionState == ConnectionState.waiting) { return const Center(child: CircularProgressIndicator()); } final orders = snapshot.data!.docs .map((doc) => OrderModel.fromMap(doc.data() as Map)) .toList(); if (orders.isEmpty) { return const Center(child: Text('No orders yet')); } return ListView.builder( itemCount: orders.length, itemBuilder: (context, index) { final order = orders[index]; return Card( child: ListTile( title: Text('Order #${order.id.substring(0, 8)}'), subtitle: Column( crossAxisAlignment: CrossAxisAlignment.start, children: [ Text('Status: ${order.status}'), Text('Total: \$${order.totalPrice.toStringAsFixed(2)}'), Text('Date: ${order.createdAt.toString().substring(0, 10)}'), ], ), trailing: const Icon(Icons.chevron_right), onTap: () { Navigator.pushNamed( context, '/user/order-details', arguments: order, ); }, ), ); }, ); }, ), ); } } import 'package:flutter/material.dart'; import 'package:cloud_firestore/cloud_firestore.dart'; import '../../models/order_model.dart'; class AdminOrdersScreen extends StatelessWidget { const AdminOrdersScreen({Key? key}) : super(key: key); @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar(title: const Text('All Orders')), body: StreamBuilder( stream: FirebaseFirestore.instance .collection('orders') .orderBy('createdAt', descending: true) .snapshots(), builder: (context, snapshot) { if (snapshot.hasError) { return Center(child: Text('Error: ${snapshot.error}')); } if (snapshot.connectionState == ConnectionState.waiting) { return const Center(child: CircularProgressIndicator()); } final orders = snapshot.data!.docs .map((doc) => OrderModel.fromMap(doc.data() as Map)) .toList(); if (orders.isEmpty) { return const Center(child: Text('No orders yet')); } return ListView.builder( itemCount: orders.length, itemBuilder: (context, index) { final order = orders[index]; return Card( child: ListTile( title: Text('Order #${order.id.substring(0, 8)}'), subtitle: Column( crossAxisAlignment: CrossAxisAlignment.start, children: [ Text('User ID: ${order.userId.substring(0, 8)}...'), Text('Status: ${order.status}'), Text('Total: \$${order.totalPrice.toStringAsFixed(2)}'), ], ), trailing: DropdownButton( value: order.status, items: const [ DropdownMenuItem(value: 'pending', child: Text('Pending')), DropdownMenuItem(value: 'accepted', child: Text('Accepted')), DropdownMenuItem(value: 'out-for-delivery', child: Text('Out for Delivery')), DropdownMenuItem(value: 'completed', child: Text('Completed')), ], onChanged: (value) { if (value != null) { FirebaseFirestore.instance .collection('orders') .doc(order.id) .update({'status': value}); } }, ), ), ); }, ); }, ), ); } } import 'package:cloud_firestore/cloud_firestore.dart'; import '../models/order_model.dart'; class OrderService { final FirebaseFirestore _firestore = FirebaseFirestore.instance; Future placeOrder(OrderModel order) async { await _firestore.collection('orders').doc(order.id).set(order.toMap()); } Stream> getOrdersByUser(String userId) { return _firestore .collection('orders') .where('userId', isEqualTo: userId) .orderBy('createdAt', descending: true) .snapshots() .map((snapshot) => snapshot.docs .map((doc) => OrderModel.fromMap(doc.data())) .toList()); } Stream> getAllOrders() { return _firestore .collection('orders') .orderBy('createdAt', descending: true) .snapshots() .map((snapshot) => snapshot.docs .map((doc) => OrderModel.fromMap(doc.data())) .toList()); } Future updateOrderStatus(String orderId, String status) async { await _firestore .collection('orders') .doc(orderId) .update({'status': status}); } } import 'package:flutter/material.dart'; class CustomTextField extends StatelessWidget { final TextEditingController controller; final String label; final bool obscureText; final Widget? suffixIcon; final String? Function(String?)? validator; const CustomTextField({ Key? key, required this.controller, required this.label, this.obscureText = false, this.suffixIcon, this.validator, }) : super(key: key); @override Widget build(BuildContext context) { return TextFormField( controller: controller, obscureText: obscureText, decoration: InputDecoration( labelText: label, border: const OutlineInputBorder(), suffixIcon: suffixIcon, ), validator: validator, ); } } import 'package:flutter/material.dart'; import 'package:provider/provider.dart'; import '../providers/auth_provider.dart'; class SplashScreen extends StatelessWidget { const SplashScreen({Key? key}) : super(key: key); @override Widget build(BuildContext context) { Future.delayed(const Duration(seconds: 2), () { _checkAuthStatus(context); }); return Scaffold( body: Center( child: Column( mainAxisAlignment: MainAxisAlignment.center, children: [ const FlutterLogo(size: 100), const SizedBox(height: 20), const Text('Delivery App', style: TextStyle(fontSize: 24)), const SizedBox(height: 20), CircularProgressIndicator( valueColor: AlwaysStoppedAnimation( Theme.of(context).primaryColor, ), ), ], ), ), ); } void _checkAuthStatus(BuildContext context) { final authProvider = Provider.of(context, listen: false); if (authProvider.user != null) { if (authProvider.user?.role == 'admin') { Navigator.pushReplacementNamed(context, '/admin/dashboard'); } else { Navigator.pushReplacementNamed(context, '/user/home'); } } else { Navigator.pushReplacementNamed(context, '/login'); } } } import 'package:flutter/material.dart'; import 'screens/auth/login_screen.dart'; import 'screens/auth/signup_screen.dart'; import 'screens/user/user_home_screen.dart'; import 'screens/admin/admin_dashboard_screen.dart'; import 'screens/user/place_order_screen.dart'; import 'screens/user/my_orders_screen.dart'; import 'screens/admin/admin_orders_screen.dart'; import 'screens/splash_screen.dart'; class AppRoutes { static Route generateRoute(RouteSettings settings) { switch (settings.name) { case '/': return MaterialPageRoute(builder: (_) => const SplashScreen()); case '/login': return MaterialPageRoute(builder: (_) => const LoginScreen()); case '/signup': return MaterialPageRoute(builder: (_) => const SignupScreen()); case '/user/home': return MaterialPageRoute(builder: (_) => const UserHomeScreen()); case '/admin/dashboard': return MaterialPageRoute(builder: (_) => const AdminDashboardScreen()); case '/user/place-order': return MaterialPageRoute(builder: (_) => const PlaceOrderScreen()); case '/user/orders': return MaterialPageRoute(builder: (_) => const MyOrdersScreen()); case '/admin/orders': return MaterialPageRoute(builder: (_) => const AdminOrdersScreen()); default: return MaterialPageRoute( builder: (_) => Scaffold( body: Center( child: Text('No route defined for ${settings.name}'), ), ), ); } } } import 'package:flutter/material.dart'; import 'package:firebase_core/firebase_core.dart'; import 'package:provider/provider.dart'; import 'providers/auth_provider.dart'; import 'providers/theme_provider.dart'; import 'routes.dart'; import 'screens/splash_screen.dart'; void main() async { WidgetsFlutterBinding.ensureInitialized(); await Firebase.initializeApp(); runApp( MultiProvider( providers: [ ChangeNotifierProvider(create: (_) => AuthProvider()), ChangeNotifierProvider(create: (_) => ThemeProvider()), ], child: const MyApp(), ), ); } class MyApp extends StatelessWidget { const MyApp({Key? key}) : super(key: key); @override Widget build(BuildContext context) { final themeProvider = Provider.of(context); return MaterialApp( title: 'Delivery App', theme: ThemeData.light(), darkTheme: ThemeData.dark(), themeMode: themeProvider.currentTheme, initialRoute: '/', onGenerateRoute: AppRoutes.generateRoute, debugShowCheckedModeBanner: false, ); } }