public void WithdrawMoney(TransactionRequest transactionRequest)
{
using (var transaction = new AtmDbContext().Database.BeginTransaction())
{
try
{
if (!this.validator.IsValidCardNumber(transactionRequest.CardNumber))
{
throw new ArgumentException("Invalid card number. Current transaction is aborted!");
}
if (!this.validator.IsValidCardPin(transactionRequest.CardPin))
{
throw new ArgumentException("Invalid Card PIN Code. Current transaction is aborted!");
}
var cardAccount = this.atmDbContext.CardAccounts
.FirstOrDefault(ca => ca.CardNumber == transactionRequest.CardNumber &&
ca.CardPin == transactionRequest.CardPin);
if (cardAccount == null)
{
throw new ArgumentException(
"There is no Card account with the given Card number. Current transaction is aborted!");
}
if (!this.validator.IsPinCodeMatches(transactionRequest.CardPin, cardAccount.CardPin))
{
throw new ArgumentException(
"Chosen Card PIN Code does not matches the actual PIN Code of the card account. Current transaction is aborted!");
}
if (
!this.validator.IsPermittedWithdrawalAmount(transactionRequest.RequestedAmount,
cardAccount.CardCash))
{
throw new ArgumentException(
"Invalid withdrawal money amount to retrieve. Current transaction is aborted!");
}
cardAccount.CardCash -= transactionRequest.RequestedAmount;
transaction.Commit();
this.atmDbContext.SaveChanges();
}
catch (Exception ex)
{
transaction.Rollback();
Console.WriteLine("\t" + ex.Message);
}
}
}
