Homer JSON Example

gistfile1.js

var person1 = {
            firstName: 'Homer',
            lastName:  'Simpson',
            cash   : 55
};
var shoppingCart = {
            dougnuts: 12,
            beer:     24,
            cigs:     1
};
var storeInventory = {
            dougnuts: 100,
            beer:     100,
            cigs:     100,
            candy:     100
    
};
var storePrices = {
            dougnuts: 0.5,
            beer: 8,
            cigs: 12,
            candy: 1
};

function checkOut(customer, customerShoppingCart){
    var total = 0;
    customer.posessions = {};
    
    if(customerShoppingCart.dougnuts > 0){
        total += customerShoppingCart.dougnuts * storePrices.dougnuts;
        transferGoods(customer, customerShoppingCart, 'dougnuts');
    }
    if(customerShoppingCart.beer > 0){
        total += customerShoppingCart.beer * storePrices.beer;
        transferGoods(customer, customerShoppingCart, 'beer');
    }
    if(customerShoppingCart.cigs > 0){
        total += customerShoppingCart.cigs * storePrices.cigs;
        transferGoods(customer, customerShoppingCart, 'cigs');
    }
    if(customerShoppingCart.candy > 0){
        total += customerShoppingCart.candy * storePrices.candy;
        transferGoods(customer, customerShoppingCart, 'candy');
    }
    
    customer.cash = customer.cash - total;
    
}


      
function transferGoods(customer, customerShoppingCart, item){
    storeInventory[item] = storeInventory[item] - customerShoppingCart[item];
    customer.posessions[item] = customerShoppingCart[item];
    customerShoppingCart[item] = 0;
    
}


console.log("Going to checkout");

checkOut(person1, shoppingCart);

console.log("Checked Out");