public void RemoveRentItem(int position)
{
if (ValidTo.HasExpired())
{
throw new RentHasExpiredException();
}
var rentItem = _rentItems.Single(item => item.ItemPosition == position);
_rentItems.Remove(rentItem);
}
public void AddRentItem(RentItem item)
{
if (ValidTo.HasExpired())
{
throw new RentHasExpiredException();
}
if (_rentItems.Any(i => i.ItemPosition == item.ItemPosition))
{
throw new RentItemAlreadyExistsOnPosition();
}
}
public bool HasExpired() => ValidTo.HasExpired();