public void Handle(ItemsRemovedEvent itemsRemovedEvent)
{
if (itemsRemovedEvent == null)
{
throw new ArgumentNullException(nameof(itemsRemovedEvent));
}
VerifyProductSkuMatchesInput(itemsRemovedEvent.ProductSku);
Quantity = (Quantity - itemsRemovedEvent.Quantity) <= 0
? 0
: Quantity - itemsRemovedEvent.Quantity;
}
private void Handle(ItemsRemovedEvent itemsRemovedEvent)
{
var existingItem = FindExistingCartItem(itemsRemovedEvent.ProductSku);
if (existingItem == null)
{
throw new CartException($"Product \"{itemsRemovedEvent.ProductSku}\" " +
$"does not exist in the cart ({Id}).");
}
else
{
existingItem.Handle(itemsRemovedEvent);
}
PurgeZeroQuantityProducts();
}
