Fixed updating of cart + added retrieval of cart & specs

public/javascripts/expressCart.js

@@ -443,12 +443,10 @@ function updateCart(){
     // gather items of cart
     var cartItems = [];
     $('.cart-product-quantity').each(function(){
-        var item = {
-            cartIndex: $(this).attr('id'),
-            itemQuantity: $(this).val(),
-            productId: $(this).attr('data-id')
-        };
-        cartItems.push(item);
+        cartItems.push({
+            productId: $(this).attr('data-id'),
+            quantity: $(this).val()
+        });
     });
 
     // update cart on server

routes/index.js

@@ -192,6 +192,16 @@ router.get('/product/:id', async (req, res) => {
     });
 });
 
+// Gets the current cart
+router.get('/cart/retrieve', async (req, res, next) => {
+    const db = req.app.db;
+
+    // Get the cart from the DB using the session id
+    const cart = await db.cart.findOne({ sessionId: getId(req.session.id) });
+
+    res.status(200).json({ cart: cart.cart });
+});
+
 // Updates a single product quantity
 router.post('/product/updatecart', (req, res, next) => {
     const db = req.app.db;
@@ -201,12 +211,20 @@ router.post('/product/updatecart', (req, res, next) => {
     let stockError = false;
 
     async.eachSeries(cartItems, async (cartItem, callback) => {
-        const productQuantity = cartItem.itemQuantity ? cartItem.itemQuantity : 1;
-        if(cartItem.itemQuantity === 0){
+        // Find index in cart
+        const cartIndex = _.findIndex(req.session.cart, { productId: cartItem.productId });
+
+        // Calculate the quantity to update
+        let productQuantity = cartItem.quantity ? cartItem.quantity : 1;
+        if(typeof productQuantity === 'string'){
+            productQuantity = parseInt(productQuantity);
+        }
+        if(productQuantity === 0){
             // quantity equals zero so we remove the item
-            req.session.cart.splice(cartItem.cartIndex, 1);
+            req.session.cart.splice(cartIndex, 1);
             callback(null);
-        }else{
+            return;
+        }
         const product = await db.products.findOne({ _id: getId(cartItem.productId) });
         if(product){
             // If stock management on check there is sufficient stock for this product
@@ -220,16 +238,15 @@ router.post('/product/updatecart', (req, res, next) => {
             }
 
             const productPrice = parseFloat(product.productPrice).toFixed(2);
-                if(req.session.cart[cartItem.cartIndex]){
-                    req.session.cart[cartItem.cartIndex].quantity = productQuantity;
-                    req.session.cart[cartItem.cartIndex].totalItemPrice = productPrice * productQuantity;
+            if(req.session.cart[cartIndex]){
+                req.session.cart[cartIndex].quantity = productQuantity;
+                req.session.cart[cartIndex].totalItemPrice = productPrice * productQuantity;
                 callback(null);
             }
         }else{
             hasError = true;
             callback(null);
         }
-        }
     }, async () => {
         // update total cart amount
         updateTotalCartAmount(req, res);

test/specs/products.js

@@ -70,6 +70,32 @@ test('[Success] Add product to cart', async t => {
     t.deepEqual(res.body.message, 'Cart successfully updated');
 });
 
+test('[Success] Update cart', async t => {
+    const cart = await g.request
+        .get('/cart/retrieve')
+        .expect(200);
+
+    // Adjust the quantity of an item
+    cart.body.cart[0].quantity = 10;
+
+    const res = await g.request
+        .post('/product/updatecart')
+        .send({
+            items: JSON.stringify(cart.body.cart)
+        })
+        .expect(200);
+
+    t.deepEqual(res.body.message, 'Cart successfully updated');
+
+    const checkCart = await g.request
+        .get('/cart/retrieve')
+        .expect(200);
+
+    // Check new quantity and total price has been updated
+    t.deepEqual(checkCart.body.cart[0].quantity, 10);
+    t.deepEqual(checkCart.body.cart[0].totalItemPrice, cart.body.cart[0].totalItemPrice * 10);
+});
+
 test('[Fail] Cannot add subscripton when other product in cart', async t => {
     const res = await g.request
         .post('/product/addtocart')