func()

in src/frontend/handlers.go [211:237]

• 25 lines of code
• 4 McCabe index (conditional complexity)

func (fe *frontendServer) addToCartHandler(w http.ResponseWriter, r *http.Request) {
	log := r.Context().Value(ctxKeyLog{}).(logrus.FieldLogger)
	quantity, _ := strconv.ParseUint(r.FormValue("quantity"), 10, 32)
	productID := r.FormValue("product_id")
	payload := validator.AddToCartPayload{
		Quantity:  quantity,
		ProductID: productID,
	}
	if err := payload.Validate(); err != nil {
		renderHTTPError(log, r, w, validator.ValidationErrorResponse(err), http.StatusUnprocessableEntity)
		return
	}
	log.WithField("product", payload.ProductID).WithField("quantity", payload.Quantity).Debug("adding to cart")

	p, err := fe.getProduct(r.Context(), payload.ProductID)
	if err != nil {
		renderHTTPError(log, r, w, errors.Wrap(err, "could not retrieve product"), http.StatusInternalServerError)
		return
	}

	if err := fe.insertCart(r.Context(), sessionID(r), p.GetId(), int32(payload.Quantity)); err != nil {
		renderHTTPError(log, r, w, errors.Wrap(err, "failed to add to cart"), http.StatusInternalServerError)
		return
	}
	w.Header().Set("location", baseUrl + "/cart")
	w.WriteHeader(http.StatusFound)
}