public Item(ItemsAddedEvent itemsAddedEvent)
{
if (itemsAddedEvent == null)
{
throw new ArgumentNullException(nameof(itemsAddedEvent));
}
ProductName = itemsAddedEvent.ProductName;
ProductSku = itemsAddedEvent.ProductSku;
PricePerUnit = itemsAddedEvent.PricePerUnit;
Quantity = itemsAddedEvent.Quantity;
}
private void Handle(ItemsAddedEvent itemsAddedEvent)
{
var existingItem = FindExistingCartItem(itemsAddedEvent.ProductSku);
if (existingItem == null)
{
items.Add(new Item(itemsAddedEvent));
}
else
{
existingItem.Handle(itemsAddedEvent);
}
}
public void Handle(ItemsAddedEvent itemsAddedEvent)
{
if (itemsAddedEvent == null)
{
throw new ArgumentNullException(nameof(itemsAddedEvent));
}
VerifyProductSkuMatchesInput(itemsAddedEvent.ProductSku);
// We'll always just update the descriptor and unit price here.
// This is an eventual consistency model.
ProductName = itemsAddedEvent.ProductName;
PricePerUnit = itemsAddedEvent.PricePerUnit;
Quantity += itemsAddedEvent.Quantity;
}
