/// <summary>
/// Mock validator that checks the passed in credentials against hard-coded values.
/// Not for production use!
/// </summary>
/// <param name="data"></param>
/// <returns></returns>
public static bool ValidateRequestCredentials(NVPCodec data)
{
bool validated = false;
// Our hard-coded authentication values:
string APIUsername = "******";
string APIPassword = "******";
string APISignature = "ABCDEFGHIJKLMNOP1234567890";
if (data[NVPProperties.Properties.USER] == APIUsername &&
data[NVPProperties.Properties.PWD] == APIPassword &&
data[NVPProperties.Properties.SIGNATURE] == APISignature)
{
validated = true;
}
return validated;
}
/// <summary>
/// Authorize the requested payment amount (first step).
/// </summary>
/// <param name="data"></param>
/// <param name="transactionId"></param>
/// <returns></returns>
public static bool AuthorizePayment(NVPCodec data, ref string token)
{
bool status = false;
// TODO: Match up the token in the data parameter to the stored token from the
// payment authorization step.
// TODO: Write output to a log file.
Debug.WriteLine("Authorizing payment amount: " + data[NVPProperties.Properties.PAYMENTREQUEST_AMT]);
// Generate an Id for this transaction.
token = new Randomizer().GetRandomString(16);
status = true;
Debug.WriteLine("Authorization token: " + token);
return status;
}
public ActionResult Review(CheckoutViewModel data)
{
if (ModelState.IsValid)
{
try
{
NVPAPICaller gatewayCaller = new NVPAPICaller();
string token = "";
NVPCodec decoder = new NVPCodec();
// Call the gateway payment authorization API:
bool ret = gatewayCaller.DoCheckoutAuth(data.Order, ref token, ref decoder);
// If authorizaton is successful:
if (ret)
{
// Hydrate a new Order model from our OrderViewModel.
var myOrder = Mapper.Map<Data.Models.Order>(data.Order);
// Timestamp with a UTC date.
myOrder.OrderDate = DateTime.UtcNow;
// Get DB context.
ProductContext _db = new ProductContext();
// Add order to DB.
_db.Orders.Add(myOrder);
_db.SaveChanges();
// Get the shopping cart items and process them.
using (ShoppingCartActions usersShoppingCart = new ShoppingCartActions(cartId))
{
List<CartItem> myOrderList = usersShoppingCart.GetCartItems();
// Add OrderDetail information to the DB for each product purchased.
for (int i = 0; i < myOrderList.Count; i++)
{
// Create a new OrderDetail object.
var myOrderDetail = new OrderDetail();
myOrderDetail.OrderId = myOrder.OrderId;
myOrderDetail.ProductId = myOrderList[i].ProductId;
myOrderDetail.Quantity = myOrderList[i].Quantity;
myOrderDetail.UnitPrice = myOrderList[i].Product.UnitPrice;
// Add OrderDetail to DB.
_db.OrderDetails.Add(myOrderDetail);
_db.SaveChanges();
}
// Set OrderId.
Session["currentOrderId"] = myOrder.OrderId;
Session["Token"] = token;
// Report successful event to Application Insights.
var eventProperties = new Dictionary<string, string>();
eventProperties.Add("CustomerEmail", data.Order.Email);
eventProperties.Add("NumberOfItems", myOrderList.Count.ToString());
eventProperties.Add("OrderTotal", data.Order.Total.ToString("C2"));
eventProperties.Add("OrderId", myOrder.OrderId.ToString());
TelemetryHelper.TrackEvent("SuccessfulPaymentAuth", eventProperties);
data.Order.OrderId = myOrder.OrderId;
if (data.Order.CreditCardNumber.Length > 4)
{
// Only show the last 4 digits of the credit card number:
data.Order.CreditCardNumber = "xxxxxxxxxxx" + data.Order.CreditCardNumber.Substring(data.Order.CreditCardNumber.Length - 4);
}
}
}
else
{
var error = gatewayCaller.PopulateGatewayErrorModel(decoder);
// Report failed event to Application Insights.
Exception ex = new Exception(error.ToString());
ex.Source = "Contoso.Apps.SportsLeague.Web.CheckoutController.cs";
TelemetryHelper.TrackException(ex);
// Redirect to the checkout error view:
return RedirectToAction("Error", error);
}
}
catch (WebException wex)
{
ExceptionUtility.LogException(wex, "CheckoutController.cs Complete Action");
var error = new CheckoutErrorViewModel
{
ErrorCode = wex.Message
};
if (wex.Response != null && wex.Response.GetType() == typeof(HttpWebResponse))
{
// Extract the response body from the WebException's HttpWebResponse:
error.LongMessage = ((HttpWebResponse)wex.Response).StatusDescription;
}
// Redirect to the checkout error view:
return RedirectToAction("Error", error);
}
catch (Exception ex)
{
ExceptionUtility.LogException(ex, "CheckoutController.cs Review Action");
var error = new CheckoutErrorViewModel
{
ErrorCode = ex.Message
};
// Redirect to the checkout error view:
return RedirectToAction("Error", error);
}
}
return View(data);
}
public async Task<ActionResult> Complete(OrderViewModel order)
{
try
{
// TODO: Complete the payment processing via the gateway and update the order...
NVPAPICaller gatewayCaller = new NVPAPICaller();
string token = "";
string finalPaymentAmount = "";
NVPCodec decoder = new NVPCodec();
token = Session["token"].ToString();
//PayerID = Session["payerId"].ToString();
//finalPaymentAmount = Session["payment_amt"].ToString();
finalPaymentAmount = order.Total.ToString("C2");
bool ret = gatewayCaller.DoCheckoutPayment(finalPaymentAmount, token, ref decoder);
if (ret)
{
// Retrieve PayPal confirmation value.
string PaymentConfirmation = decoder[NVPProperties.Properties.TRANSACTIONID].ToString();
order.PaymentTransactionId = PaymentConfirmation;
ProductContext _db = new ProductContext();
// Get the current order id.
int currentOrderId = -1;
if (Session["currentOrderId"] != null && Session["currentOrderId"].ToString() != string.Empty)
{
currentOrderId = Convert.ToInt32(Session["currentOrderID"]);
}
Order myCurrentOrder;
if (currentOrderId >= 0)
{
// Get the order based on order id.
myCurrentOrder = _db.Orders.Single(o => o.OrderId == currentOrderId);
// Update the order to reflect payment has been completed.
myCurrentOrder.PaymentTransactionId = PaymentConfirmation;
// Save to DB.
_db.SaveChanges();
// Queue up a receipt generation request, asynchronously.
await new AzureQueueHelper().QueueReceiptRequest(currentOrderId);
// Report successful event to Application Insights.
var eventProperties = new Dictionary<string, string>();
eventProperties.Add("CustomerEmail", order.Email);
eventProperties.Add("OrderTotal", finalPaymentAmount);
eventProperties.Add("PaymentTransactionId", PaymentConfirmation);
TelemetryHelper.TrackEvent("OrderCompleted", eventProperties);
}
// Clear shopping cart.
using (ShoppingCartActions usersShoppingCart =
new ShoppingCartActions(cartId))
{
usersShoppingCart.EmptyCart();
}
// Clear order id.
Session["currentOrderId"] = string.Empty;
}
else
{
var error = gatewayCaller.PopulateGatewayErrorModel(decoder);
// Report failed event to Application Insights.
Exception ex = new Exception(error.ToString());
ex.Source = "Contoso.Apps.SportsLeague.Web.CheckoutController.cs";
TelemetryHelper.TrackException(ex);
// Redirect to the checkout error view:
return RedirectToAction("Error", error);
}
}
catch (WebException wex)
{
ExceptionUtility.LogException(wex, "CheckoutController.cs Complete Action");
var error = new CheckoutErrorViewModel
{
ErrorCode = wex.Message
};
if (wex.Response != null && wex.Response.GetType() == typeof(HttpWebResponse))
{
// Extract the response body from the WebException's HttpWebResponse:
error.LongMessage = ((HttpWebResponse)wex.Response).StatusDescription;
}
// Redirect to the checkout error view:
return RedirectToAction("Error", error);
}
catch (Exception ex)
{
ExceptionUtility.LogException(ex, "CheckoutController.cs Complete Action");
var error = new CheckoutErrorViewModel
{
ErrorCode = ex.Message
};
// Redirect to the checkout error view:
return RedirectToAction("Error", error);
}
return View(order);
}
public HttpResponseMessage PerformAction([FromBody] string data)
{
string response = string.Empty;
HttpResponseMessage resp = new HttpResponseMessage();
var encoder = new NVPCodec();
try
{
// Deserialize the string data into a key value pair collection.
var decoder = new NVPCodec();
decoder.Decode(data);
// Perform mock validation:
var isAuthorized = ProcessorMethods.ValidateRequestCredentials(decoder);
if (isAuthorized)
{
// Determine which method is being called:
string method = decoder[NVPProperties.Properties.METHOD];
if (!string.IsNullOrWhiteSpace(method))
{
if (method.ToLower().Trim() == NVPProperties.Methods.AuthorizePayment.ToLower())
{
// Conduct the payment authorization (first step).
string token = string.Empty;
var status = ProcessorMethods.AuthorizePayment(decoder, ref token);
if (status)
{
// Success!
encoder[NVPProperties.Properties.ACK] = "success";
encoder[NVPProperties.Properties.TOKEN] = token;
}
}
else if (method.ToLower().Trim() == NVPProperties.Methods.ProcessPayment.ToLower())
{
// Conduct a final processing of the payment.
string transactionId = string.Empty;
var status = ProcessorMethods.ProcessPayment(decoder, ref transactionId);
if (status)
{
// Success!
encoder[NVPProperties.Properties.ACK] = "success";
encoder[NVPProperties.Properties.TRANSACTIONID] = transactionId;
}
}
else
{
// Invalid method requested. Throw implementation error.
throw new InvalidOperationException("The specified transaction method was invalid.");
}
}
}
else
{
// Throw unauthorized response.
resp.StatusCode = HttpStatusCode.Unauthorized;
resp.Content = new StringContent("You are unauthorized to use this API. Check your credentials and try again.", Encoding.UTF8, "text/plain");
return resp;
}
}
catch (Exception ex)
{
// TODO: Log exception; catch other exception types first
encoder[NVPProperties.Properties.ERRORCODE] = ex.Source;
encoder[NVPProperties.Properties.LONGMESSAGE] = ex.Message;
encoder[NVPProperties.Properties.ACK] = "failure";
}
finally
{
// Serialize our response.
response = encoder.Encode();
}
resp.StatusCode = HttpStatusCode.OK;
resp.Content = new StringContent(response, Encoding.UTF8, "text/plain");
return resp;
}
