public static CreditCard Create(Customer customer, string name, long cardNum, DateTime expiry)
{
if (customer == null)
throw new Exception("Customer object can't be null");
if (string.IsNullOrEmpty(name))
throw new Exception("Name can't be empty");
if (cardNum < 6)
throw new Exception("Card number length is incorrect");
if (DateTime.Now > expiry)
throw new Exception("Credit card expiry can't be in the past");
CreditCard creditCard = new CreditCard
{
Customer = customer,
NameOnCard = name,
CardNumber = cardNum,
Expiry = expiry,
Active = true,
Created = DateTime.Today
};
if(customer.CreditCards.Contains(creditCard))
throw new Exception("Can't add same card to the collection");
return creditCard;
}
public virtual void Add(CreditCard creditCard)
{
this.creditCards.Add(creditCard);
}