private void CalculateItemPrice(OrderItem item)
{
item.Price = item.Ingredients.Sum(i => i.Price * i.Ammount);
Func <Ingredients, decimal> calculateSaleIngredient = ingredient =>
{
var price = item.Ingredients
.Where(i => i.Ingredient.Id != (short)ingredient)
.Sum(i => i.Price * i.Ammount);
return(price + item.Ingredients
.Where(i => i.Ingredient.Id == (short)ingredient)
.Sum(i => i.Price * (i.Ammount - i.Ammount / IngredientSaleAmmount)));
};
// The sales are calculated according to their priority.
// If one sale applies to one item, no other sales can be applied.
if (item.HasIngredient(Ingredients.Alface) && !item.HasIngredient(Ingredients.Bacon))
{
item.Price *= 0.9m;
item.Sale = Sales.Light;
}
else if (item.CountIngredient(Ingredients.Hamburguer) >= IngredientSaleAmmount)
{
item.Price = calculateSaleIngredient(Ingredients.Hamburguer);
item.Sale = Sales.MuitaCarne;
}
else if (item.CountIngredient(Ingredients.Queijo) >= IngredientSaleAmmount)
{
item.Price = calculateSaleIngredient(Ingredients.Queijo);
item.Sale = Sales.MuitoQueijo;
}
}