func()

in src/frontend/handlers.go [320:401]
75 lines of code
6 McCabe index (conditional complexity)

func (fe *frontendServer) placeOrderHandler(w http.ResponseWriter, r *http.Request) {
	log := r.Context().Value(ctxKeyLog{}).(logrus.FieldLogger)
	log.Debug("placing order")

	var (
		email         = r.FormValue("email")
		streetAddress = r.FormValue("street_address")
		zipCode, _    = strconv.ParseInt(r.FormValue("zip_code"), 10, 32)
		city          = r.FormValue("city")
		state         = r.FormValue("state")
		country       = r.FormValue("country")
		ccNumber      = r.FormValue("credit_card_number")
		ccMonth, _    = strconv.ParseInt(r.FormValue("credit_card_expiration_month"), 10, 32)
		ccYear, _     = strconv.ParseInt(r.FormValue("credit_card_expiration_year"), 10, 32)
		ccCVV, _      = strconv.ParseInt(r.FormValue("credit_card_cvv"), 10, 32)
	)

	payload := validator.PlaceOrderPayload{
		Email:         email,
		StreetAddress: streetAddress,
		ZipCode:       zipCode,
		City:          city,
		State:         state,
		Country:       country,
		CcNumber:      ccNumber,
		CcMonth:       ccMonth,
		CcYear:        ccYear,
		CcCVV:         ccCVV,
	}
	if err := payload.Validate(); err != nil {
		renderHTTPError(log, r, w, validator.ValidationErrorResponse(err), http.StatusUnprocessableEntity)
		return
	}

	order, err := pb.NewCheckoutServiceClient(fe.checkoutSvcConn).
		PlaceOrder(r.Context(), &pb.PlaceOrderRequest{
			Email: payload.Email,
			CreditCard: &pb.CreditCardInfo{
				CreditCardNumber:          payload.CcNumber,
				CreditCardExpirationMonth: int32(payload.CcMonth),
				CreditCardExpirationYear:  int32(payload.CcYear),
				CreditCardCvv:             int32(payload.CcCVV)},
			UserId:       sessionID(r),
			UserCurrency: currentCurrency(r),
			Address: &pb.Address{
				StreetAddress: payload.StreetAddress,
				City:          payload.City,
				State:         payload.State,
				ZipCode:       int32(payload.ZipCode),
				Country:       payload.Country},
		})
	if err != nil {
		renderHTTPError(log, r, w, errors.Wrap(err, "failed to complete the order"), http.StatusInternalServerError)
		return
	}
	log.WithField("order", order.GetOrder().GetOrderId()).Info("order placed")

	order.GetOrder().GetItems()
	recommendations, _ := fe.getRecommendations(r.Context(), sessionID(r), nil)

	totalPaid := *order.GetOrder().GetShippingCost()
	for _, v := range order.GetOrder().GetItems() {
		multPrice := money.MultiplySlow(*v.GetCost(), uint32(v.GetItem().GetQuantity()))
		totalPaid = money.Must(money.Sum(totalPaid, multPrice))
	}

	currencies, err := fe.getCurrencies(r.Context())
	if err != nil {
		renderHTTPError(log, r, w, errors.Wrap(err, "could not retrieve currencies"), http.StatusInternalServerError)
		return
	}

	if err := templates.ExecuteTemplate(w, "order", injectCommonTemplateData(r, map[string]interface{}{
		"show_currency":   false,
		"currencies":      currencies,
		"order":           order.GetOrder(),
		"total_paid":      &totalPaid,
		"recommendations": recommendations,
	})); err != nil {
		log.Println(err)
	}
}