var cart = function(spec,my){

    // Private vars and functions

    var iNumItemsOrdered = 0;
    var iNumItemsLeft= 2;

    my = my || {};

    init();

    function init(){
        if (spec){
            my.sItemLabel = spec
        }else{
            my.sItemLabel = "Item";
        }

    }

    // Protected

    my.checkItemInventory = function(){
        return (iNumItemsLeft > 0);
    }


    //Public api

    var that = {
        createCart:function(){
            console.log("CART. cart created.");
        },

        placeOrder:function(){
            console.log("CART. placed order for " + iNumItemsOrdered + " " + my.sItemLabel +  "s.");
        },

        addItemToCart:function(){
            if (my.checkItemInventory()){
                iNumItemsOrdered++;
                console.log("CART. " + my.sItemLabel +  " added.");
                iNumItemsLeft--;
            }else{
                console.log("CART. sorry " + my.sItemLabel +  "s all gone!");
            }
        }
    }

    return that;

};



var sooperCart = function(spec,my){

    my = my || {};

    // "Inherit" all methods from cart

    var that = cart(spec,my);

    // Add additional method

    that.addAllItems = function(){
        console.log("CART. add ALL " + my.sItemLabel +  ".");

        while (my.checkItemInventory()){
            that.addItemToCart();
        }
    }

    return that;
};