示例#1
0
        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 })));
        }