public async Task <IHttpActionResult> CompletePayment(WechatPaymentNotificationModel notification)
{
if (notification == null || !notification.IsValid())
{
return(Ok(GetErrorModel(ApiErrorCode.InvalidData)));
}
using (var context = new TasteContext())
{
var payment = context.Payments.FirstOrDefault(o => o.TransactionId == notification.TransactionId);
if (payment == null || payment.Success)
{
return(Ok());
}
var order = context.Orders.FirstOrDefault(o =>
o.OrderId == payment.OrderId && o.UserId == payment.UserId);
if (order == null)
{
return(Ok());
}
var restaurant = context.Restaurants.FirstOrDefault(r => r.Id == order.RestaurantId);
if (restaurant == null)
{
return(Ok());
}
var merchantId = ConfigurationManager.AppSettings.Get("WeChatMerchantId");
var merchantKey = ConfigurationManager.AppSettings.Get("WeChatMerchantKey");
var paymentMade = await WechatPayHttpClient.CheckIfPaymentIsPaidAsync(payment.TransactionId, ConfigurationManager.AppSettings.Get("WeChatMiniProgramAppId"), merchantId, merchantKey);
if (!paymentMade)
{
return(Ok(GetErrorModel(ApiErrorCode.PaymentNotMade)));
}
payment.Success = true;
order.Paid = true;
restaurant.OustandingBalance += Convert.ToInt32(notification.Total / restaurant.ExchangeRate);
context.SaveChanges();
return(Ok());
}
}
public async Task <IHttpActionResult> InitializePayment(PaymentRequestModel model)
{
using (var context = new TasteContext())
{
var order = context.Orders.FirstOrDefault(o => o.OrderId == model.OrderId && o.UserId == model.UserId);
if (order == null || order.Paid)
{
return(Ok(GetErrorModel(ApiErrorCode.OrderDoesNotExist)));
}
var restaurant = context.Restaurants.FirstOrDefault(r => r.Id == order.RestaurantId);
if (restaurant == null)
{
return(Ok(GetErrorModel(ApiErrorCode.RestaurantDoesNotExist)));
}
const string body = "豪吃";
const string signType = "MD5";
var appId = ConfigurationManager.AppSettings.Get("WeChatMiniProgramAppId");
var merchantId = ConfigurationManager.AppSettings.Get("WeChatMerchantId");
var merchantKey = ConfigurationManager.AppSettings.Get("WeChatMerchantKey");
var notifyUrl = $"{RequestBaseUrl}/api/v1/payment/complete";
var userAddress = HttpContext.Current.Request.UserHostAddress;
var nonce = Guid.NewGuid().ToString().Replace("-", "");
var timeStamp = DateTime.Now.SecondsSinceEpoch().ToString();
var transactionId = Guid.NewGuid().ToString().Replace("-", "");
double total = 0;
var orderItems = context.OrderedDishes.Where(o => o.OrderId == model.OrderId && o.UserId == model.UserId);
foreach (var od in orderItems)
{
var item = context.Dishes.FirstOrDefault(it => it.Id == od.DishId);
if (item == null)
{
continue;
}
total += item.Price * od.Quantity;
}
context.Payments.Add(new Payment
{
Success = false,
TransactionId = transactionId,
CreationDate = DateTimeExtensions.BeiJingNow(),
UserId = model.UserId,
OrderId = model.OrderId
});
order.TipInPennies = model.TipInPennies;
order.TotalInPennies = Convert.ToInt32(total * 100);
order.TaxInPennies = Convert.ToInt32(order.TotalInPennies * 0.0925);
context.SaveChanges();
var subTotalRmb = Convert.ToInt32(order.TotalInPennies * restaurant.ExchangeRate);
var tipRmb = Convert.ToInt32(model.TipInPennies * restaurant.ExchangeRate);
var taxInPenniesRmb = Convert.ToInt32(order.TaxInPennies * restaurant.ExchangeRate);
var orderTotalRmb = subTotalRmb + tipRmb + taxInPenniesRmb;
var result = await WechatPayHttpClient.GetPaymentInfo(userAddress, notifyUrl, appId, orderTotalRmb, WechatTradeType.JSAPI, transactionId, body, merchantId, model.UserId, merchantKey);
var paymentData = new WechatPaymentModel
{
Body = body,
NotifyUrl = notifyUrl,
TransactionId = transactionId,
TotalAmountInPennies = orderTotalRmb,
PrepayId = result.PrepayId,
PaySign = WechatMd5SignGenerator.GetPaymentSignMd5Hash(appId, timeStamp, nonce, result.PrepayId, signType, merchantKey),
Nonce = nonce,
SignType = signType,
TimeStamp = timeStamp,
WebUrl = result.WebUrl
};
return(Ok(paymentData));
}
}
