CosCump.js

var shopKart = (function(){
    //Private methods and poperties
var cart = [];

function Item (name, price, count) {
    this.name = name;
    this.price = price;
    this.count = count;
};

function saveCart() {
    localStorage.setItem("shoppingCart", JSON.stringify(cart));
}
function loadCart() {
    this.cart = JSON.parse(localStorage.getItem("shoppingCart"));
}

loadCart();

//Public methods and poperties
var obj = {};
obj.addItemToCart = function(name, price, count) {
        for (var i in cart){
            if(cart[i].name === name) {
               cart[i].count += count;
               saveCart();
            return; 
            }

        }
        var item = new Item(name, price, count);
        cart.push(item);
        saveCart();
    };

obj.setCountForItem = function(name, count) {
        for(var i in cart) {
            if (cart[i].name === name) {
                cart[i].count = count;// ! String
                break;
            }
        }
        saveCart();
        };

obj.removeItemFromCart = function(name) {
            for (var i in cart) {
               if (cart[i].name === name) {
                   cart[i].count --;
                   if (cart[i].count === 0) {
                     cart.splice(i, 1);
                   }
                   break;
               } 
            }
            saveCart();
        };

obj.removeItemFromCartAll = function (name) {
            for (var i in cart) {
                if (cart[i].name === name) {
                   cart.splice(i, 1);
                   break;
            }
        }
            saveCart();
    }

obj.clearCart = function() {
        cart = [];
        saveCart();
    }
  
obj.countCart = function () {
        var totalCount = 0;
        for (var i in cart) {
            totalCount += cart[i].count;
        }
        return totalCount;
    }
    // console.log(shopKart.countCart());

obj.totalCart = function() {
        var totalCost = 0;
        for (var i in cart) {
            totalCost += cart[i].price * cart[i].count;
        }
        return totalCost.toFixed(2);
    };

obj.listCart = function() {
        var cartCopy = [];
        for (var i in cart) {
            var item = cart[i];
            var itemCopy = {};
            for (var p in item) {
                itemCopy[p] = item[p];

            }
            itemCopy.total = (item.price * item.count).toFixed(2); 
            cartCopy.push(itemCopy);
        }
        return cartCopy;
    };


   //---------------- 
    return obj;
})();