public async Task <ResponseDto> MakePayment(PaymentRequestDto dto)
{
var result = new ResponseDto();
//validation of request data
var paymentProvider = _context.PaymentProviders
.SingleOrDefault(x => x.PaymentProviderUniqueToken == dto.PaymentProviderUniqueToken);
if (paymentProvider is null)
{
result.Status = PaymentStatus.Failed;
result.ResultCode = ResultCode.PaymentProviderError;
return(result);
}
var card = _context.Cards
.SingleOrDefault(x =>
string.Format("{0} {1}", x.Client.FirstName, x.Client.LastName) == dto.CardHolderName &&
x.CardNumber == x.CardNumber &&
x.ExpirationDate == x.ExpirationDate &&
x.Cvc == x.Cvc);
if (card is null)
{
result.Status = PaymentStatus.Failed;
result.ResultCode = ResultCode.CardError;
return(result);
}
else if (card.Balance < dto.Amount)
{
result.Status = PaymentStatus.Failed;
result.ResultCode = ResultCode.CardBalanceError;
return(result);
}
card.Balance -= dto.Amount;
//create and save new transaction in db
var transaction = new Transaction
{
PaymentProvider = dto.PaymentProviderUniqueToken,
TimeStamp = dto.TimeStamp,
Amount = dto.Amount,
PaymentProviderToken = dto.PaymentProviderUniqueToken,
CardId = card.Id,
Status = result.Status,
ResultCode = result.ResultCode
};
_context.Transactions.Add(transaction);
//update card data and save all changes in db
await _context.MockSaveChangesAsync();
//if all request data is valid, take paymeny amount from card's balance
result.Status = PaymentStatus.Paid;
result.ResultCode = ResultCode.Success;
result.OperationId = Guid.NewGuid();//Mock transactionId
return(result);
}