SRP_spagheti.ts

class OrderManager {
    public async createOrder(orderData) {

        if (!orderData.items.length) {
            throw new ValidationError("Cannot create an order: cart is empty");
        }
        orderData.items.forEach((orderItem) => {
            if (orderItem.productId === undefined || orderItem.quantity === undefined || orderItem.price === undefined) {
                throw new ValidationError("Cannot create an order: product ID is missing");
            }
        })

        let totalPrice = orderData.items.reduce( (totalPrice, orderItem) => totalPrice + (orderItem.price *  orderItem.quantity));
        totalPrice = totalPrice + totalPrice * 0.05;    // add service commission

        const paymentGateway = new MyPaymentGateway(process.env.STRIPE_KEY);
        paymentGateway.pay(totalPrice, orderData.paymentInfo);

        const order = new Order(orderData);
        await orderRepository.save(orderData);
        
        return order;
    }
}