update checkout logic

Author: Dang

e_shoppe/lib/features/checkout/checkout_page.dart

@@ -43,6 +43,22 @@ class _CheckoutPageState extends ConsumerState<CheckoutPage> {
         }
       }
     });
+
+    // Listen for draft changes and keep CartBloc in sync
+    ref.listen<OrderDraft>(orderDraftProvider, (prev, next) {
+      final cartBloc = context.read<CartBloc>();
+      // Rebuild cart state to mirror draft exactly.
+      cartBloc.add(const CartCleared());
+      for (final item in next.items) {
+        for (var i = 0; i < item.quantity; i++) {
+          cartBloc.add(CartItemAdded(item.product));
+        }
+        if (item.discountValue > 0) {
+          cartBloc.add(CartItemDiscountChanged(
+              productId: item.product.id, discount: item.discountValue));
+        }
+      }
+    });
   }
 
   @override

e_shoppe/lib/features/checkout/payment_page.dart

@@ -1,23 +1,27 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
 
 import '../../shared/widgets/blue_header.dart';
 import '../../shared/widgets/section_card.dart';
 import '../../theme/app_theme.dart';
 import '../cart/bloc/cart_bloc.dart';
 import 'order_success_page.dart';
 import '../../shared/responsive.dart';
+import '../order/riverpod/order_draft_provider.dart';
+import '../../services/api_client.dart';
+import '../../data/models/user.dart';
 
-class PaymentPage extends StatefulWidget {
+class PaymentPage extends ConsumerStatefulWidget {
   const PaymentPage({super.key});
 
   @override
-  State<PaymentPage> createState() => _PaymentPageState();
+  ConsumerState<PaymentPage> createState() => _PaymentPageState();
 }
 
 enum PayMethod { cod, vnpay }
 
-class _PaymentPageState extends State<PaymentPage> {
+class _PaymentPageState extends ConsumerState<PaymentPage> {
   PayMethod _method = PayMethod.cod;
 
   @override
@@ -80,13 +84,42 @@ class _PaymentPageState extends State<PaymentPage> {
               padding: const EdgeInsets.symmetric(vertical: 14),
               child: Center(
                 child: GestureDetector(
-                  onTap: () {
-                    context.read<CartBloc>().add(const CartCleared());
-                    Navigator.of(context).pushAndRemoveUntil(
-                      MaterialPageRoute(
-                          builder: (_) => const OrderSuccessPage()),
-                      (route) => route.isFirst,
-                    );
+                  onTap: () async {
+                    final draft = ref.read(orderDraftProvider);
+                    if (draft.items.isEmpty) return;
+                    final api = ref.read(apiProvider);
+                    ScaffoldMessenger.of(context).showSnackBar(
+                        const SnackBar(content: Text('Đang gửi đơn hàng...')));
+                    try {
+                      final customer = draft.customer ??
+                          const User(id: 'guest', name: 'Guest', email: '');
+                      await api.post('/orders', {
+                        'customer': {
+                          'id': customer.id,
+                          'name': customer.name,
+                          'email': customer.email,
+                        },
+                        'items': draft.items
+                            .map((e) => {
+                                  'productId': e.product.id,
+                                  'quantity': e.quantity,
+                                })
+                            .toList(),
+                      });
+
+                      // Clear local state
+                      context.read<CartBloc>().add(const CartCleared());
+                      ref.read(orderDraftProvider.notifier).clear();
+
+                      Navigator.of(context).pushAndRemoveUntil(
+                        MaterialPageRoute(
+                            builder: (_) => const OrderSuccessPage()),
+                        (route) => route.isFirst,
+                      );
+                    } catch (e) {
+                      ScaffoldMessenger.of(context).showSnackBar(SnackBar(
+                          content: Text('Gửi đơn thất bại: $e')));
+                    }
                   },
                   child: const Text('Xác nhận',
                       style: TextStyle(