public void AcceptPayment(Customer customer, IEnumerable<Product> products, decimal payment)
{
decimal subTotal = CalculateSubtotal();
subTotal = SubtractDiscounts(subTotal);
decimal grandTotal = AddTax(subTotal);
SubtractFromCustomerBalance(customer, grandTotal);
}
public decimal ProcessOrder(Customer customer, IEnumerable<Product> products)
{
// do some processing of order
decimal orderTotal = products.Sum(p => p.Price);
Type customerType = customer.GetType();
if (customerType == typeof(Employee))
{
orderTotal -= orderTotal * 0.15m;
}
else if (customerType == typeof(NonEmployee))
{
orderTotal -= orderTotal * 0.05m;
}
return orderTotal;
}
private void SubtractFromCustomerBalance(Customer customer, decimal grandTotal)
{
customer.DeductFromAccountBalance(grandTotal);
}