public bool CreatePizza(PizzaViewModel pizza)
        {
            List <Pizza> pizzas = _pizzaRepository.FindPizzasOnPromotion();

            if (!PizzasOnPromotionCheck.CheckPizzasOnPromotion(pizzas, pizza.IsOnPromotion))
            {
                return(false);
            }
            Pizza newPizza = pizza.ToPizzaDomainModel();

            _pizzaRepository.Insert(newPizza);
            return(true);
        }