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 {
        string createNewCart();
        Cart addToCart(in ProductOrder productOrder);
        Cart removeFromCart(in ProductOrder productOrder);
        Cart checkOutCart();
    };
};