private static LookupResult <List <int> > GetItemsInCustomersBasketLINQ(string customerName)
{
return(
from customerId in Datastore.GetCustomer(customerName)
from basketId in Datastore.GetBasket(customerId)
from items in Datastore.GetItemsInBasket(basketId)
select items
);
}
private static LookupResult <List <int> > GetItemsInCustomersBasket(string customerName)
{
var customerId = Datastore.GetCustomer(customerName);
if (customerId.IsNothing)
{
return(LookupResult <List <int> > .Nothing);
}
else
{
var basketId = Datastore.GetBasket(customerId.Value);
if (basketId.IsNothing)
{
return(LookupResult <List <int> > .Nothing);
}
else
{
var items = Datastore.GetItemsInBasket(basketId.Value);
return(items);
}
}
}