// AJAX: /ShoppingCart/AddItemToShoppingCart/
public JsonResult AddItemToShoppingCart(ShoppingCartItemViewModel itemModel)
{
// Check if there's a cart for this session
ShoppingCart shoppingCart = _shoppingCartService.GetShoppingCart(CookieFactory.GetShoppingCartCookie(Request, Response));
ShoppingCartItem item = Mapper.Map <ShoppingCartItemViewModel, ShoppingCartItem>(itemModel);
ShoppingCartItem retItem = _shoppingCartItemService.AddOrUpdateShoppingCartItem(item, shoppingCart.Guid);
_shoppingCartItemService.SaveShoppingCartItem();
ShoppingCartItemViewModel newModel = Mapper.Map <ShoppingCartItem, ShoppingCartItemViewModel>(retItem);
decimal total = _offerService.GetTotal(shoppingCart, _itemService.GetItems());
return(Json(new { newModel, total = total }, JsonRequestBehavior.AllowGet));
}