public static bool CardAmountIsEnough(CardAccount account, decimal requestedAmount)
{
var cardAmount = account.CardCash;
if (cardAmount < requestedAmount)
{
return(false);
}
return(true);
}
public static bool CardNumberAndPinAreValid(CardAccount account, string pin, string number)
{
var cardPin = account.CardPIN;
var cardNumber = account.CardNumber;
if (pin == cardPin && number == cardNumber)
{
return(true);
}
return(false);
}
public static void WithdrawMoney(CardAccount account, string pin, string cardNumber, decimal requestedAmount)
{
var context = new ATMEntities();
var transaction = context.Database.BeginTransaction();
if (!CardNumberAndPinAreValid(account, pin, cardNumber))
{
transaction.Rollback();
throw new InvalidOperationException("Card PIN and number are invalid!");
}
if (!CardAmountIsEnough(account, requestedAmount))
{
transaction.Rollback();
throw new InvalidOperationException("Not enough amount!");
}
account.CardCash -= requestedAmount;
LogTransaction(cardNumber, requestedAmount);
transaction.Commit();
Console.WriteLine("Withdrawal complete.");
}