Function addToCart

manual-testing-sandbox/next-edit/next-edit-5-3.ts:56–96

(productId: number, quantity: number = 1)

// Add product to cart
function addToCart(productId: number, quantity: number = 1) {
  // Check if product exists
  if (!PRODUCTS[productId]) {
    console.error("Product not found!");
    return false;
  }

  // Check if enough stock
  if (PRODUCTS[productId].stock < quantity) {
    console.error("Not enough stock!");
    return false;
  }

  // Check if product already in cart
  let existingItem = false;
  for (let i = 0; i < cartItems.length; i++) {
    if (cartItems[i].productId === productId) {
      // Update quantity
      cartItems[i].quantity += quantity;
      existingItem = true;
      break;
    }
  }

  // Add new item if not already in cart
  if (!existingItem) {
    cartItems.push({
      productId,
      quantity,
      price: PRODUCTS[productId].price,
    });
  }

  // Update stock
  PRODUCTS[productId].stock -= quantity;

  // Recalculate cart total
  calculateCartTotal();

  return true;
}

// Remove product from cart
function removeFromCart(productId: number, quantity: number = 1) {