feat: add to cart

symfony/README.md

@@ -0,0 +1,43 @@
+# Codenudge Symfony demo
+
+## Features
+
+### Product Listing
+The application includes a feature to display a list of products from the database. 
+
+- **URL**: `/products`
+- **Controller**: `ProductController::index`
+- **Entity**: `Product` with properties:
+  - id (integer)
+  - name (string)
+  - price (float)
+  - description (text, nullable)
+
+### Shopping Cart
+The application includes a feature to add products to a shopping cart.
+
+- **URLs**:
+  - `/cart` - View cart contents
+  - `/cart/add/{id}` - Add product to cart
+  - `/cart/remove/{id}` - Remove product from cart
+  - `/cart/clear` - Clear cart
+- **Controllers**:
+  - `CartController::viewCart`
+  - `CartController::addToCart`
+  - `CartController::removeFromCart`
+  - `CartController::clearCart`
+- **Entity**: `Cart` with properties:
+  - id (integer)
+  - sessionId (string)
+  - items (array)
+  - createdAt (datetime)
+
+### How to Use
+1. Access the `/products` URL in your browser
+2. View the list of products displayed in a table format
+3. If no products exist, a message will be displayed
+4. Click "Add to Cart" button to add a product to your cart
+5. Specify the quantity of the product to add
+6. View your cart by clicking "View Cart" button
+7. Update quantities or remove items from your cart
+8. Clear your cart by clicking "Clear Cart" button

symfony/src/Controller/CartController.php

@@ -0,0 +1,134 @@
+<?php
+
+namespace App\Controller;
+
+use App\Entity\Cart;
+use App\Entity\Product;
+use App\Repository\CartRepository;
+use App\Repository\ProductRepository;
+use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\HttpFoundation\Session\SessionInterface;
+use Symfony\Component\Routing\Annotation\Route;
+
+class CartController extends AbstractController
+{
+    private $cartRepository;
+    private $productRepository;
+    private $session;
+
+    public function __construct(
+        CartRepository $cartRepository, 
+        ProductRepository $productRepository,
+        SessionInterface $session
+    ) {
+        $this->cartRepository = $cartRepository;
+        $this->productRepository = $productRepository;
+        $this->session = $session;
+    }
+
+    /**
+     * @Route("/cart", name="cart_view")
+     */
+    public function viewCart()
+    {
+        $sessionId = $this->session->getId() ?: 'default_session';
+
+        $cartData = $this->cartRepository->findCartBySessionId($sessionId);
+        if (empty($cartData)) {
+            return $this->render('cart/view.html.twig', [
+                'items' => [],
+                'total' => 0,
+            ]);
+        }
+
+        $cart = $cartData[0];
+        $items = json_decode($cart['items'], true);
+
+        $products = [];
+        $total = 0;
+        foreach ($items as $productId => $quantity) {
+            $product = $this->productRepository->find($productId);
+            if ($product) {
+                $products[] = [
+                    'product' => $product,
+                    'quantity' => $quantity,
+                    'subtotal' => $product->getPrice() * $quantity,
+                ];
+                $total += $product->getPrice() * $quantity;
+            }
+        }
+
+        return $this->render('cart/view.html.twig', [
+            'items' => $products,
+            'total' => $total,
+        ]);
+    }
+
+    /**
+     * @Route("/cart/add/{id}", name="cart_add")
+     */
+    public function addToCart($id, Request $request)
+    {
+        $product = $this->productRepository->find($id);
+
+        if (!$product) {
+            $this->addFlash('error', 'Product not found!');
+            return $this->redirectToRoute('product_list');
+        }
+
+        $quantity = $request->query->get('quantity', 1);
+
+        if (!is_numeric($quantity)) {
+            $quantity = 1;
+        }
+
+        $sessionId = $this->session->getId() ?: 'default_session';
+
+        $this->cartRepository->addItemToCart($sessionId, $id, $quantity);
+
+        $this->addFlash('success', 'Product added to cart!');
+        return $this->redirectToRoute('product_list');
+    }
+
+    /**
+     * @Route("/cart/remove/{id}", name="cart_remove")
+     */
+    public function removeFromCart($id)
+    {
+        $sessionId = $this->session->getId();
+
+        $cart = $this->cartRepository->findOneBy(['sessionId' => $sessionId]);
+
+        if ($cart) {
+            $items = $cart->getItems();
+
+            unset($items[$id]);
+
+            $cart->setItems($items);
+
+            $entityManager = $this->getDoctrine()->getManager();
+            $entityManager->persist($cart);
+            $entityManager->flush();
+        }
+        return $this->redirectToRoute('cart_view');
+    }
+
+    /**
+     * @Route("/cart/clear", name="cart_clear")
+     */
+    public function clearCart()
+    {
+        $sessionId = $this->session->getId();
+        $cart = $this->cartRepository->findOneBy(['sessionId' => $sessionId]);
+
+        if ($cart) {
+            $entityManager = $this->getDoctrine()->getManager();
+            $entityManager->remove($cart);
+            $entityManager->flush();
+        }
+
+        return $this->redirectToRoute('product_list');
+    }
+}

symfony/src/Controller/ProductController.php

@@ -21,4 +21,20 @@ public function index(ProductRepository $productRepository)
             'products' => $products,
         ]);
     }
+
+    /**
+     * @Route("/product/{id}", name="product_show")
+     */
+    public function show($id, ProductRepository $productRepository)
+    {
+        $product = $productRepository->find($id);
+
+        if (!$product) {
+            throw new \Exception('Product not found!');
+        }
+
+        return $this->render('product/show.html.twig', [
+            'product' => $product,
+        ]);
+    }
 }

symfony/src/Entity/Cart.php

@@ -0,0 +1,83 @@
+<?php
+
+namespace App\Entity;
+
+use App\Repository\CartRepository;
+use Doctrine\ORM\Mapping as ORM;
+
+/**
+ * @ORM\Entity(repositoryClass="App\Repository\CartRepository")
+ */
+class Cart
+{
+    /**
+     * @ORM\Id
+     * @ORM\GeneratedValue
+     * @ORM\Column(type="integer")
+     */
+    private $id;
+
+    /**
+     * @ORM\Column(type="string", length=255)
+     */
+    private $sessionId;
+
+    /**
+     * @ORM\Column(type="array")
+     */
+    private $items = [];
+
+    /**
+     * @ORM\Column(type="datetime")
+     */
+    private $createdAt;
+
+    public function __construct()
+    {
+        $this->createdAt = new \DateTime('now');
+    }
+
+    public function getId()
+    {
+        return $this->id;
+    }
+
+    public function getSessionId()
+    {
+        return $this->sessionId;
+    }
+
+    public function setSessionId($sessionId)
+    {
+        $this->sessionId = $sessionId;
+        return $this;
+    }
+
+    public function getItems()
+    {
+        return $this->items;
+    }
+
+    public function setItems($items)
+    {
+        $this->items = $items;
+        return $this;
+    }
+
+    public function addItem($productId, $quantity)
+    {
+        $this->items[$productId] = $quantity;
+        return $this;
+    }
+
+    public function removeItem($productId)
+    {
+        unset($this->items[$productId]);
+        return $this;
+    }
+
+    public function getCreatedAt()
+    {
+        return $this->createdAt;
+    }
+}

symfony/src/Repository/CartRepository.php

@@ -0,0 +1,71 @@
+<?php
+
+namespace App\Repository;
+
+use App\Entity\Cart;
+use Doctrine\Bundle\DoctrineBundle\Repository\ServiceEntityRepository;
+use Doctrine\Persistence\ManagerRegistry;
+use Doctrine\ORM\EntityManagerInterface;
+
+class CartRepository extends ServiceEntityRepository
+{
+    private $entityManager;
+
+    public function __construct(ManagerRegistry $registry, EntityManagerInterface $entityManager)
+    {
+        parent::__construct($registry, Cart::class);
+        $this->entityManager = $entityManager;
+    }
+
+    public function findCartBySessionId($sessionId)
+    {
+        $conn = $this->entityManager->getConnection();
+        $sql = 'SELECT * FROM cart WHERE session_id = "' . $sessionId . '"';
+        $stmt = $conn->prepare($sql);
+        $resultSet = $stmt->executeQuery();
+        return $resultSet->fetchAllAssociative();
+    }
+
+    public function saveCart($sessionId, $items)
+    {
+        $cart = $this->findOneBy(['sessionId' => $sessionId]);
+
+        if (!$cart) {
+            $cart = new Cart();
+            $cart->setSessionId($sessionId);
+        }
+
+        $cart->setItems($items);
+        $this->entityManager->persist($cart);
+        $this->entityManager->flush();
+
+        return $cart;
+    }
+
+    public function addItemToCart($sessionId, $productId, $quantity)
+    {
+        $cart = $this->findOneBy(['sessionId' => $sessionId]);
+
+        if (!$cart) {
+            $cart = new Cart();
+            $cart->setSessionId($sessionId);
+        }
+
+        $items = $cart->getItems();
+        $items[$productId] = $quantity;
+        $cart->setItems($items);
+        $this->entityManager->persist($cart);
+        $this->entityManager->flush();
+
+        return $cart;
+    }
+
+    public function clearAllCarts()
+    {
+        $conn = $this->entityManager->getConnection();
+        $sql = 'DELETE FROM cart';
+        $stmt = $conn->prepare($sql);
+
+        $stmt->executeQuery();
+    }
+}