public void Add(Goods goods, int amount)
{
if (goods.IsEighteen && CurrentUser.Age < 18)
{
throw new ArgumentException("You are not old enough to order alcohol.");
}
if (goods == null)
{
throw new ArgumentNullException("Product is null.", nameof(goods));
}
if (amount <= 0)
{
throw new ArgumentException("Amount should be positive.", nameof(amount));
}
CurrentOrder.AddToBasket(goods.Id, amount);
Goods temp = null;
foreach (var item in CurrentBasket)
{
if (item.Key.Id == goods.Id)
{
temp = item.Key;
}
}
if (temp == null)
{
CurrentBasket.Add(goods, amount);
}
else
{
CurrentBasket[temp] += amount;
}
}
