Implement shopping cart with localStorage persistence and checkout integration

api/nohup.out

@@ -0,0 +1,13 @@
+Configured CORS origins: [
+  'http://localhost:5137',
+  'http://localhost:3001',
+  /^https:\/\/.*\.app\.github\.dev$/
+]
+🚀 Initializing database...
+🚀 Initializing database...
+🚀 Starting database migration...
+✅ No pending migrations. Database is up to date.
+✅ Database initialization complete!
+✅ Database initialized successfully
+Server is running on port 3000
+API documentation is available at http://localhost:3000/api-docs

frontend/src/App.tsx

@@ -4,9 +4,11 @@ import Welcome from './components/Welcome';
 import About from './components/About';
 import Footer from './components/Footer';
 import Products from './components/entity/product/Products';
+import Cart from './components/entity/Cart';
 import Login from './components/Login';
 import { AuthProvider } from './context/AuthContext';
 import { ThemeProvider } from './context/ThemeContext';
+import { CartProvider } from './context/CartContext';
 import AdminProducts from './components/admin/AdminProducts';
 import { useTheme } from './context/ThemeContext';
 
@@ -25,6 +27,7 @@ function ThemedApp() {
             <Route path="/" element={<Welcome />} />
             <Route path="/about" element={<About />} />
             <Route path="/products" element={<Products />} />
+            <Route path="/cart" element={<Cart />} />
             <Route path="/login" element={<Login />} />
             <Route path="/admin/products" element={<AdminProducts />} />
           </Routes>
@@ -39,7 +42,9 @@ function App() {
   return (
     <AuthProvider>
       <ThemeProvider>
-        <ThemedApp />
+        <CartProvider>
+          <ThemedApp />
+        </CartProvider>
       </ThemeProvider>
     </AuthProvider>
   );

frontend/src/components/Navigation.tsx

@@ -1,11 +1,13 @@
 import { Link } from 'react-router-dom';
 import { useAuth } from '../context/AuthContext';
 import { useTheme } from '../context/ThemeContext';
+import { useCart } from '../context/CartContext';
 import { useState } from 'react';
 
 export default function Navigation() {
   const { isLoggedIn, isAdmin, logout } = useAuth();
   const { darkMode, toggleTheme } = useTheme();
+  const { totalItems } = useCart();
   const [adminMenuOpen, setAdminMenuOpen] = useState(false);
 
   return (
@@ -85,6 +87,31 @@ export default function Navigation() {
             </div>
           </div>
           <div className="flex items-center space-x-4">
+            <Link
+              to="/cart"
+              className="relative p-2 rounded-full focus:outline-none transition-colors"
+              aria-label={`Cart (${totalItems} items)`}
+            >
+              <svg
+                xmlns="http://www.w3.org/2000/svg"
+                className={`h-6 w-6 ${darkMode ? 'text-light' : 'text-gray-700'}`}
+                fill="none"
+                viewBox="0 0 24 24"
+                stroke="currentColor"
+              >
+                <path
+                  strokeLinecap="round"
+                  strokeLinejoin="round"
+                  strokeWidth="2"
+                  d="M3 3h2l.4 2M7 13h10l4-8H5.4M7 13L5.4 5M7 13l-2.293 2.293c-.63.63-.184 1.707.707 1.707H17m0 0a2 2 0 100 4 2 2 0 000-4zm-8 2a2 2 0 11-4 0 2 2 0 014 0z"
+                />
+              </svg>
+              {totalItems > 0 && (
+                <span className="absolute -top-1 -right-1 bg-primary text-white text-xs font-bold rounded-full h-5 w-5 flex items-center justify-center">
+                  {totalItems}
+                </span>
+              )}
+            </Link>
             <button
               onClick={toggleTheme}
               className="p-2 rounded-full focus:outline-none transition-colors"

frontend/src/components/entity/Cart.tsx

@@ -0,0 +1,210 @@
+import { useState } from 'react';
+import { Link, useNavigate } from 'react-router-dom';
+import axios from 'axios';
+import { useCart, effectivePrice } from '../../context/CartContext';
+import { useTheme } from '../../context/ThemeContext';
+import { api } from '../../api/config';
+
+const DEFAULT_BRANCH_ID = 1;
+
+export default function Cart() {
+  const { items, updateQuantity, removeFromCart, clearCart, totalPrice } = useCart();
+  const { darkMode } = useTheme();
+  const navigate = useNavigate();
+  const [isCheckingOut, setIsCheckingOut] = useState(false);
+
+  const handleCheckout = async () => {
+    if (items.length === 0) return;
+    setIsCheckingOut(true);
+    try {
+      const orderRes = await axios.post(`${api.baseURL}${api.endpoints.orders}`, {
+        branchId: DEFAULT_BRANCH_ID,
+        status: 'pending',
+        orderDate: new Date().toISOString(),
+        name: 'Cart Order',
+        description: 'Order placed via shopping cart',
+      });
+      const orderId: number = orderRes.data.orderId;
+
+      await Promise.all(
+        items.map((item) =>
+          axios.post(`${api.baseURL}${api.endpoints.orderDetails}`, {
+            orderId,
+            productId: item.productId,
+            quantity: item.quantity,
+            unitPrice: effectivePrice(item),
+          }),
+        ),
+      );
+
+      clearCart();
+      alert(`Order #${orderId} placed successfully!`);
+      navigate('/products');
+    } catch (error) {
+      console.error('Checkout failed:', error);
+      alert('Checkout failed. Please try again.');
+    } finally {
+      setIsCheckingOut(false);
+    }
+  };
+
+  if (items.length === 0) {
+    return (
+      <div
+        className={`min-h-screen ${darkMode ? 'bg-dark' : 'bg-gray-100'} pt-20 px-4 transition-colors duration-300`}
+      >
+        <div className="max-w-3xl mx-auto">
+          <h1
+            className={`text-3xl font-bold ${darkMode ? 'text-light' : 'text-gray-800'} mb-8 transition-colors duration-300`}
+          >
+            Your Cart
+          </h1>
+          <div
+            className={`flex flex-col items-center justify-center py-20 rounded-lg ${darkMode ? 'bg-gray-800' : 'bg-white'} shadow-sm border ${darkMode ? 'border-gray-700' : 'border-gray-200'}`}
+          >
+            <svg
+              xmlns="http://www.w3.org/2000/svg"
+              className={`h-16 w-16 mb-4 ${darkMode ? 'text-gray-400' : 'text-gray-400'}`}
+              fill="none"
+              viewBox="0 0 24 24"
+              stroke="currentColor"
+            >
+              <path
+                strokeLinecap="round"
+                strokeLinejoin="round"
+                strokeWidth="1.5"
+                d="M3 3h2l.4 2M7 13h10l4-8H5.4M7 13L5.4 5M7 13l-2.293 2.293c-.63.63-.184 1.707.707 1.707H17m0 0a2 2 0 100 4 2 2 0 000-4zm-8 2a2 2 0 11-4 0 2 2 0 014 0z"
+              />
+            </svg>
+            <p className={`text-lg font-medium ${darkMode ? 'text-light' : 'text-gray-800'}`}>
+              Your cart is empty
+            </p>
+            <Link
+              to="/products"
+              className="mt-4 px-6 py-2 bg-primary hover:bg-accent text-white rounded-lg transition-colors"
+            >
+              Browse Products
+            </Link>
+          </div>
+        </div>
+      </div>
+    );
+  }
+
+  return (
+    <div
+      className={`min-h-screen ${darkMode ? 'bg-dark' : 'bg-gray-100'} pt-20 pb-16 px-4 transition-colors duration-300`}
+    >
+      <div className="max-w-3xl mx-auto">
+        <h1
+          className={`text-3xl font-bold ${darkMode ? 'text-light' : 'text-gray-800'} mb-8 transition-colors duration-300`}
+        >
+          Your Cart
+        </h1>
+
+        <div
+          className={`rounded-lg shadow-sm overflow-hidden ${darkMode ? 'bg-gray-800 border-gray-700' : 'bg-white border-gray-200'} border mb-6`}
+        >
+          {items.map((item) => {
+            const itemPrice = effectivePrice(item);
+            return (
+              <div
+                key={item.productId}
+                className={`flex items-center justify-between p-4 border-b last:border-b-0 ${darkMode ? 'border-gray-700' : 'border-gray-200'}`}
+              >
+                <div className="flex-1 min-w-0 mr-4">
+                  <p className={`font-medium ${darkMode ? 'text-light' : 'text-gray-800'} truncate`}>
+                    {item.name}
+                  </p>
+                  <p className={`text-sm ${darkMode ? 'text-gray-400' : 'text-gray-500'}`}>
+                    ${itemPrice.toFixed(2)} each
+                    {item.discount && (
+                      <span className="ml-1 text-primary text-xs">
+                        ({Math.round(item.discount * 100)}% off)
+                      </span>
+                    )}
+                  </p>
+                </div>
+
+                <div className="flex items-center space-x-3 shrink-0">
+                  <div
+                    className={`flex items-center space-x-2 ${darkMode ? 'bg-gray-700' : 'bg-gray-100'} rounded-lg p-1`}
+                  >
+                    <button
+                      onClick={() => updateQuantity(item.productId, item.quantity - 1)}
+                      className={`w-7 h-7 flex items-center justify-center ${darkMode ? 'text-light' : 'text-gray-700'} hover:text-primary transition-colors`}
+                      aria-label={`Decrease quantity of ${item.name}`}
+                    >
+                      <span aria-hidden="true">-</span>
+                    </button>
+                    <span
+                      className={`min-w-[1.5rem] text-center text-sm ${darkMode ? 'text-light' : 'text-gray-800'}`}
+                      aria-label={`Quantity of ${item.name}: ${item.quantity}`}
+                    >
+                      {item.quantity}
+                    </span>
+                    <button
+                      onClick={() => updateQuantity(item.productId, item.quantity + 1)}
+                      className={`w-7 h-7 flex items-center justify-center ${darkMode ? 'text-light' : 'text-gray-700'} hover:text-primary transition-colors`}
+                      aria-label={`Increase quantity of ${item.name}`}
+                    >
+                      <span aria-hidden="true">+</span>
+                    </button>
+                  </div>
+
+                  <span
+                    className={`w-20 text-right font-medium ${darkMode ? 'text-light' : 'text-gray-800'}`}
+                  >
+                    ${(itemPrice * item.quantity).toFixed(2)}
+                  </span>
+
+                  <button
+                    onClick={() => removeFromCart(item.productId)}
+                    className={`${darkMode ? 'text-gray-400 hover:text-red-400' : 'text-gray-400 hover:text-red-500'} transition-colors`}
+                    aria-label={`Remove ${item.name} from cart`}
+                  >
+                    <svg className="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                      <path
+                        strokeLinecap="round"
+                        strokeLinejoin="round"
+                        strokeWidth="2"
+                        d="M6 18L18 6M6 6l12 12"
+                      />
+                    </svg>
+                  </button>
+                </div>
+              </div>
+            );
+          })}
+        </div>
+
+        <div
+          className={`rounded-lg p-6 ${darkMode ? 'bg-gray-800 border-gray-700' : 'bg-white border-gray-200'} border shadow-sm`}
+        >
+          <div className="flex justify-between items-center mb-6">
+            <span className={`text-xl font-bold ${darkMode ? 'text-light' : 'text-gray-800'}`}>
+              Total
+            </span>
+            <span className="text-2xl font-bold text-primary">${totalPrice.toFixed(2)}</span>
+          </div>
+
+          <div className="flex flex-col sm:flex-row gap-3">
+            <button
+              onClick={handleCheckout}
+              disabled={isCheckingOut}
+              className="flex-1 py-3 bg-primary hover:bg-accent text-white font-medium rounded-lg transition-colors disabled:opacity-50 disabled:cursor-not-allowed"
+            >
+              {isCheckingOut ? 'Placing Order…' : 'Place Order'}
+            </button>
+            <Link
+              to="/products"
+              className={`flex-1 py-3 text-center rounded-lg font-medium transition-colors ${darkMode ? 'bg-gray-700 text-light hover:bg-gray-600' : 'bg-gray-100 text-gray-700 hover:bg-gray-200'}`}
+            >
+              Continue Shopping
+            </Link>
+          </div>
+        </div>
+      </div>
+    </div>
+  );
+}

frontend/src/components/entity/product/Products.tsx

@@ -3,6 +3,7 @@ import axios from 'axios';
 import { useQuery } from 'react-query';
 import { api } from '../../../api/config';
 import { useTheme } from '../../../context/ThemeContext';
+import { useCart } from '../../../context/CartContext';
 
 interface Product {
   productId: number;
@@ -28,6 +29,7 @@ export default function Products() {
   const [showModal, setShowModal] = useState(false);
   const { data: products, isLoading, error } = useQuery('products', fetchProducts);
   const { darkMode } = useTheme();
+  const { addToCart } = useCart();
 
   const filteredProducts = products?.filter(
     (product) =>
@@ -42,14 +44,21 @@ export default function Products() {
     }));
   };
 
-  const handleAddToCart = (productId: number) => {
-    const quantity = quantities[productId] || 0;
+  const handleAddToCart = (product: Product) => {
+    const quantity = quantities[product.productId] || 0;
     if (quantity > 0) {
-      // TODO: Implement cart functionality
-      alert(`Added ${quantity} items to cart`);
+      addToCart(
+        {
+          productId: product.productId,
+          name: product.name,
+          price: product.price,
+          discount: product.discount,
+        },
+        quantity,
+      );
       setQuantities((prev) => ({
         ...prev,
-        [productId]: 0,
+        [product.productId]: 0,
       }));
     }
   };
@@ -228,7 +237,7 @@ export default function Products() {
                         </button>
                       </div>
                       <button
-                        onClick={() => handleAddToCart(product.productId)}
+                        onClick={() => handleAddToCart(product)}
                         className={`px-4 py-2 rounded-lg transition-colors ${
                           quantities[product.productId]
                             ? 'bg-primary hover:bg-accent text-white'