module shoppingCart{
    struct Product{
        long productId;
        string productName;
        double productPrice;
        long productQuanity;
    };

    struct ProductOrder {
        long productOrderId;
        Product product;
        long productOrderQuanity;
    };

    typedef sequence<Product> ListOfProducts;
    typedef sequence<ProductOrder> Orders;
    struct Cart {
     Orders orders;
    };

    interface Shop {
        ListOfProducts showAvailableProducts();
        string createNewCart();
    };

    interface CartManager {
        Cart showCart(out Cart cart);
        Cart addToCart(in ProductOrder productOrder, out Cart cart);
        Cart removeFromCart(in ProductOrder productOrder, out Cart cart);
        Cart checkOutCart(out Cart cart);
    };
};