public async Task <int> InitialiseAsync(FulfillRequest request, string merchantId)
{
var existing = await _context.Payments.FirstOrDefaultAsync(x => x.CorrelationId == request.CorrelationId);
if (existing is null)
{
var payment = new Payment
{
Amount = request.Amount,
CardNumber = request.CardNumber,
CreatedDate = DateTime.Now,
CorrelationId = request.CorrelationId,
CurrencyCode = request.CurrencyCode,
CVV = request.CVV,
ExpiryMonthYear = request.ExpiryMonthYear,
MerchantId = merchantId,
Status = PaymentStatus.Pending
};
_context.Add(payment);
await _context.SaveChangesAsync();
_logger.LogInformation($"Payment Initilised | Correlation Id: {request.CorrelationId}");
return(payment.Id);
}
else if (existing.Status != PaymentStatus.Pending)
{
_logger.LogCritical($"Payment has already been completed | Correlation Id: {request.CorrelationId}");
throw new Exception("Payment has already been completed");
}
return(existing.Id);
}
public async Task <ActionResult <FulfillResponse> > Fulfill(FulfillRequest request)
{
var detector = new CreditCardDetector(request.CardNumber);
if (!detector.IsValid())
{
_logger.LogError($"Invalid Card Number | Correlation Id: {request.CorrelationId}");
return(BadRequest("Invalid card number"));
}
var merchantId = HttpContext.User.Identity.Name;
var id = await _paymentService.InitialiseAsync(request, merchantId);
var bankRequest = new BankFulfillRequest
{
ExpiryMonthYear = request.ExpiryMonthYear,
CardNumber = request.CardNumber,
Amount = request.Amount,
CurrencyCode = request.CurrencyCode,
CVV = request.CVV,
MerchantId = merchantId
};
var result = await _clientFactory.GetClient(request.CardNumber).FulfillAsync(bankRequest);
var status = GetStatus(result.Status);
await _paymentService.FulfillAsync(id, status, result.TransactionId);
return(Ok(new FulfillResponse
{
BankTransactionId = result.TransactionId,
Status = status
}));
}
public FulFillResponse Fulfill(FulfillRequest request)
{
return(new FulFillResponse
{
TransactionId = Guid.NewGuid(),
Status = request.Amount % 5 == 0 ? Status.Failure : Status.Success
});
}
public async Task <FulfillResponse> Fulfill(FulfillRequest request)
{
var content = new StringContent(JsonSerializer.Serialize(request), Encoding.UTF8, "application/json");
var response = await _client.PostAsync("Payment", content);
response.EnsureSuccessStatusCode();
using var responseStream = await response.Content.ReadAsStreamAsync();
return(await JsonSerializer.DeserializeAsync <FulfillResponse>(responseStream));
}
