public DiscountRuleBuilder WithUnits(StockKeepingUnit unit, int quantity)
{
ItemPile existinPile = _itemPiles.FirstOrDefault(i => i.Unit == unit);
if (existinPile != null)
{
existinPile.AddToPile(quantity);
}
else
{
_itemPiles.Add(new ItemPile(unit, quantity));
}
return(this);
}
public void Scan(string item)
{
if (string.IsNullOrWhiteSpace(item))
{
throw new ArgumentNullException(nameof(item)); //if this was a web api controller it should return a Bad Request
}
StockKeepingUnit unit = _unitRepository.GetByName(item);
if (unit == null)
{
throw new Exception($"Item {item} does not exist in stock.");
}
ItemPile existingPile = _basket.FirstOrDefault(p => p.Unit == unit);
if (existingPile != null)
{
existingPile.AddToPile(1);
}
else
{
_basket.Add(new ItemPile(unit, 1));
}
}