public async Task <IActionResult> ProcessPayment(PaymentDTO model)
{
if (ModelState.IsValid)
{
if (model.Amount < 1M)
{
return(BadRequest(Message.ResponseMessage("Error", errors: new { message = "Amount cannot be less than 1 pound" })));
}
if (model.ExpirationDate < DateTime.Today)
{
return(BadRequest(Message.ResponseMessage("Error", errors: new { message = "Sorry, your card has expired" })));
}
var paymentAmount = model.Amount;
string id;
PaymentModel payment;
bool changePaymentStatus;
//handling of cheap payments
if (paymentAmount < 21M)
{
do
{
id = Guid.NewGuid().ToString();
payment = await _cheapPaymentGateway.GetCheapPaymentById(id);
} while (payment != null);
var CheapPayment = new PaymentModel
{
PaymentId = id,
CreditCardNumber = model.CreditCardNumber,
CardHolder = model.CardHolder,
ExpirationDate = model.ExpirationDate,
SecurityCode = model.SecurityCode,
Amount = model.Amount
};
try
{
var result = await _cheapPaymentGateway.AddCheapPayment(CheapPayment);
//update the status of the payment
PaymentState status;
if (result)
{
var RecentlyAdded = await _cheapPaymentGateway.GetCheapPaymentById(id);
status = await _statusRepo.GetStatusByName("success");
RecentlyAdded.PaymentStateId = status.PaymentStateId; //error here
changePaymentStatus = await _cheapPaymentGateway.UpdateCheapPayment(RecentlyAdded);
if (changePaymentStatus)
{
paymentCounter = 0;
return(Ok(Message.ResponseMessage("Success", data: new { message = $"Payment of {(model.Amount > 1 ? model.Amount + " pounds" : model.Amount + " pound")} was successful" })));
}
//if update of status doesn't succeed perform a rollback to 'pending'
paymentCounter = 0;
status = await _statusRepo.GetStatusByName("failed");
RecentlyAdded.PaymentStateId = status.PaymentStateId;
changePaymentStatus = await _cheapPaymentGateway.UpdateCheapPayment(RecentlyAdded);
return(StatusCode(500, Message.ResponseMessage("Error", errors: new { message = $"Couldn't update payment status" })));
}
else
{
return(StatusCode(500, Message.ResponseMessage("Error", errors: new { message = $"Couldn't make payment of {(model.Amount > 1 ? model.Amount + " pounds" : model.Amount + " pound")}. Try again" })));
}
}
catch (Exception ex)
{
return(StatusCode(500, Message.ResponseMessage("Server Error", errors: new { message = ex.Message })));
}
}
//handling of expensive payments
if (paymentAmount >= 21M && paymentAmount <= 500M)
{
do
{
id = Guid.NewGuid().ToString();
payment = await _expensivePaymentGateway.GetExpensivePaymentById(id);
} while (payment != null);
var ExpensivePayment = new PaymentModel
{
PaymentId = id,
CreditCardNumber = model.CreditCardNumber,
CardHolder = model.CardHolder,
ExpirationDate = model.ExpirationDate,
SecurityCode = model.SecurityCode,
Amount = model.Amount
};
try
{
var result = await _expensivePaymentGateway.AddExpensivePayment(ExpensivePayment);
//update the status of the payment
PaymentState status;
if (result)
{
var RecentlyAdded = await _expensivePaymentGateway.GetExpensivePaymentById(id);
status = await _statusRepo.GetStatusByName("success");
RecentlyAdded.PaymentStateId = status.PaymentStateId;
changePaymentStatus = await _expensivePaymentGateway.UpdateExpensivePayment(RecentlyAdded);
if (changePaymentStatus)
{
paymentCounter = 0;
return(Ok(Message.ResponseMessage("Success", data: new { message = $"Payment of {model.Amount} pounds was successful" })));
}
//if update of status doesn't succeed perform a rollback to 'pending'
paymentCounter = 0;
status = await _statusRepo.GetStatusByName("failed");
RecentlyAdded.PaymentStateId = status.PaymentStateId;
changePaymentStatus = await _expensivePaymentGateway.UpdateExpensivePayment(RecentlyAdded);
return(StatusCode(500, Message.ResponseMessage("Error", errors: new { message = $"Couldn't update payment status" })));
}
else
{
return(StatusCode(500, Message.ResponseMessage("Error", errors: new { message = $"Couldn't make payment of {(model.Amount > 1 ? model.Amount + " pounds" : model.Amount + " pound")}. Try again" })));
}
}
catch (Exception ex)
{
//Execute the cheapPaymentGateway once if expensive payment fails
if (paymentCounter < 1)
{
var tryCheapPayment = await _cheapPaymentGateway.AddCheapPayment(ExpensivePayment);
if (tryCheapPayment)
{
paymentCounter++;
}
return(Ok(Message.ResponseMessage("Success", data: new { message = $"Payment of {model.Amount} pounds was successful" })));
}
return(StatusCode(500, Message.ResponseMessage("Server Error", errors: new { message = ex.Message })));
}
}
if (paymentAmount > 500)
{
//handling of premium payments
premiumPay:
do
{
id = Guid.NewGuid().ToString();
payment = await _expensivePaymentGateway.GetExpensivePaymentById(id);
} while (payment != null);
var PremiumPayment = new PaymentModel
{
PaymentId = id,
CreditCardNumber = model.CreditCardNumber,
CardHolder = model.CardHolder,
ExpirationDate = model.ExpirationDate,
SecurityCode = model.SecurityCode,
Amount = model.Amount
};
PaymentState status;
try
{
var result = await _premiumPaymentGateway.AddPremiumPayment(PremiumPayment);
//update the status of the payment
if (result)
{
var RecentlyAdded = await _premiumPaymentGateway.GetPremiumPaymentById(id);
status = await _statusRepo.GetStatusByName("success");
RecentlyAdded.PaymentStateId = status.PaymentStateId;
changePaymentStatus = await _premiumPaymentGateway.UpdatePremiumPayment(RecentlyAdded);
if (changePaymentStatus)
{
paymentCounter = 0;
return(Ok(Message.ResponseMessage("Success", data: new { message = $"Payment of {model.Amount} pounds was successful" })));
}
//if update of status doesn't succeed perform a rollback to 'pending'
paymentCounter = 0;
status = await _statusRepo.GetStatusByName("failed");
RecentlyAdded.PaymentStateId = status.PaymentStateId;
changePaymentStatus = await _premiumPaymentGateway.UpdatePremiumPayment(RecentlyAdded);
return(StatusCode(500, Message.ResponseMessage("Error", errors: new { message = $"Couldn't update payment status" })));
}
else
{
return(StatusCode(500, Message.ResponseMessage("Error", errors: new { message = $"Couldn't make payment of {(model.Amount > 1 ? model.Amount + " pounds" : model.Amount + " pound")}. Try again" })));
}
}
catch (Exception ex)
{
while (paymentCounter < 3)
{
paymentCounter++;
goto premiumPay;
}
return(StatusCode(500, Message.ResponseMessage("Server Error", errors: new { message = ex.Message })));
}
}
}
return(BadRequest(Message.ResponseMessage("Error", errors: new { message = ModelState })));
}