public CardPaymentResponse DoPayment(CardPaymentRequest request)
{
var paymentStatus = _paymentRepository.GetPaymentStatus(request.RequestId);
if (paymentStatus != null)
{
throw new RequestAlreadyProcessedException(paymentStatus.Status, paymentStatus.RequestId);
}
var currentPaymentStatus = new PaymentStatus()
{
RequestId = request.RequestId, Status = PaymentStatusEnum.Scheduled
};
_paymentRepository.AddPaymentStatus(currentPaymentStatus);
var cards = _cardRepository.GetAllCards();
if (!cards.Contains(request.GetCard()))
{
return new CardPaymentResponse {
TransactionStatus = TransactionStatus.Declined, Message = "Wrong card details", RequestId = request.RequestId
}
}
;
var bankAccounts = _bankAccountRepository.GetAllBankAccounts();
if (!bankAccounts.Contains(request.GetBankAccount()))
{
return new CardPaymentResponse {
TransactionStatus = TransactionStatus.Declined, Message = "Wrong bank account details", RequestId = request.RequestId
}
}
;
try
{
// here the bank performs the transaction
currentPaymentStatus.TransactionId = Guid.NewGuid().ToString();
// transaction ok
currentPaymentStatus.Status = PaymentStatusEnum.Completed;
_paymentRepository.UpdatePaymentStatus(currentPaymentStatus);
}
catch (Exception e)
{
currentPaymentStatus.Status = PaymentStatusEnum.Error;
_paymentRepository.UpdatePaymentStatus(currentPaymentStatus);
throw;
}
// return the status
return(new CardPaymentResponse {
TransactionStatus = TransactionStatus.Succeeded, RequestId = request.RequestId, TransactionId = currentPaymentStatus.TransactionId
});
}
}
}
