public void Submit(ProductEnum productEnum, string CreditCardNumber, string expiryDate)
{
// Step-1 => check product stock
if (!_productStockRepository.IsInStock(productEnum))
{
throw new Exception($"{productEnum.ToString()} not in stock");
}
// Step-2 => payment
_paymentProcessor.ChargeCreditCard(CreditCardNumber, expiryDate);
//Step-3 => shiping the product
_shippingProcessor.MailProduct(productEnum);
}
