Fixed code

Author: Rodolfo Martínez

pkg/routes/middleware.go

@@ -3,16 +3,39 @@ package routes
 import (
 	"encoding/json"
 	"io/ioutil"
+	"log"
 	"net/http"
 )
 
+type Item struct {
+	Name     string  `json:"name"`
+	Quantity int     `json:"quantity"`
+	Price    int     `json:"price"`
+	Id       float32 `json:"id"`
+}
+
+type ItemListPrice struct {
+	Items []Item `json:"item"`
+	Total int    `json:"total"`
+}
+
+var itemsBunch ItemListPrice
+
 func add(w http.ResponseWriter, r *http.Request) {
 	w.Header().Set("Content-Type", "application/json; charset=UTF-8")
 
 	if r.Method == "POST" {
 		w.WriteHeader(http.StatusOK)
 		bodyBytes, _ := ioutil.ReadAll(r.Body)
-		if err := json.NewEncoder(w).Encode(bodyBytes); err != nil {
+		var element Item
+		err := json.Unmarshal(bodyBytes, &element)
+		if err != nil {
+			log.Println("error:", err)
+		}
+		itemsBunch.Items = append(itemsBunch.Items, element)
+		totalProduct := productTotalPrice(element.Price, element.Quantity)
+		itemsBunch.Total = newTotal(itemsBunch.Total, totalProduct)
+		if err := json.NewEncoder(w).Encode(itemsBunch); err != nil {
 			panic(err)
 		}
 	} else {
@@ -31,3 +54,11 @@ func delete(w http.ResponseWriter, r *http.Request) {
 	// ..
 
 }
+
+func newTotal(total, newElement int) int {
+	return total + newElement
+}
+
+func productTotalPrice(productPrice, quantity int) int {
+	return productPrice * quantity
+}

web/app/js/app.js

@@ -7,9 +7,13 @@ function fetch() {
 
 }
 
+function addID() {
+  return Math.random();
+}
+
 function add(name, price, quantity) {
   axios.post('/add', {
-    id: queryName,
+    id: addID(),
     name: name,
     quantity: parseInt(price),
     price: parseInt(quantity)
@@ -210,7 +214,7 @@ function paragraphAdd() {
 }
 
 function setQuery(id) {
- var name =  id.split("-"); 
+ var name =  id.split("-");
   queryName = name[0]
 }
 
@@ -222,9 +226,9 @@ function setValueModal(id){
   var nameRef = name+"-name"
   var quantRef = quantity+"-quantity"
   var priceRef = price+"-price"
-  var nameItem = document.getElementById(nameRef).textContent; 
-  var quantityItem = document.getElementById(quantRef).textContent; 
-  var priceItem = document.getElementById(priceRef).textContent; 
+  var nameItem = document.getElementById(nameRef).textContent;
+  var quantityItem = document.getElementById(quantRef).textContent;
+  var priceItem = document.getElementById(priceRef).textContent;
   $('#editName').val(nameItem);
   $('#editQuantity').val(quantityItem);
   $('#editPrice').val(priceItem);