public void ChargeCustomer(CustomerId customerId,
IList <Product> products)
{
var customer
= customerRepository.GetCustomer(customerId);
var invoice
= purchaseRepository.CreateInvoice(customer, products);
mailService.SendInvoice(customer, invoice);
}
public Invoice MakePurchase(Customer customer,
Product product, Discount discount)
{
var purchase
= purchaseRepository.CreatePurchase(customer);
purchaseRepository.AddProduct(purchase, product);
var invoice
= purchaseRepository.CreateInvoice(purchase);
if (discount != null)
{
invoice.ApplyDiscount(discount);
}
return(invoice);
}
