public static void Items(
ILi <ITodoItem> target,
IEl <int> nextId,
IMultiOp <string> newItem_,
IOp <Empty> deleteCompletedItems_,
IMultiOp <string> deleteItem_,
ITodoItemFactory factory)
{
var newItem = newItem_.Read();
Empty tmp;
bool deleteCompletedItems = deleteCompletedItems_.TryRead(out tmp);
var deleteItem = deleteItem_.Read();
if (newItem.Count <= 0 &&
!deleteCompletedItems &&
deleteItem.Count <= 0)
{
return;
}
var items = target.AsWrite();
if (newItem.Count > 0)
{
for (int i = 0, n = newItem.Count; i < n; ++i)
{
items.Add(factory.Create((nextId.Read() + i).ToString(), newItem[i]));
}
nextId.Write(nextId.Read() + newItem.Count);
}
if (deleteCompletedItems)
{
items.RemoveAll(it =>
{
if (it.IsCompleted.Read())
{
factory.Dispose(it);
return(true);
}
return(false);
});
}
if (deleteItem.Count > 0)
{
items.RemoveAll(it =>
{
if (deleteItem.Contains(it.Id))
{
factory.Dispose(it);
return(true);
}
return(false);
});
}
}
public State(CompositeDisposable cd, IEngine engine)
{
NextId = engine.El(1);
CreateNewItem = engine.MultiOp <string>();
Items = engine.Li(new List <ITodoItem>());
ToggleItemComplete = engine.MultiOp <string>();
UncompletedCount = engine.El(0);
DeleteCompletedItems = engine.Op <Empty>();
DeleteItem = engine.MultiOp <string>();
EditItem = engine.Op <string>();
EditingItemId = engine.El <string>(null);
FinishEditItem = engine.Op <string>();
ItemFactory = new TodoItem.Factory(cd, engine,
ToggleItemComplete, EditingItemId, FinishEditItem);
engine.Computer(cd,
new object[] {
Items,
ToggleItemComplete,
},
() => Computers.UncompletedCount(
UncompletedCount,
Items
)
);
engine.Computer(cd,
new object[]
{
CreateNewItem,
DeleteCompletedItems,
DeleteItem
},
() => Computers.Items(
Items,
NextId,
CreateNewItem,
DeleteCompletedItems,
DeleteItem,
ItemFactory
)
);
engine.Computer(cd,
new object[]
{
EditItem,
FinishEditItem
},
() => Computers.EditingItemId(
EditingItemId,
EditItem,
FinishEditItem
)
);
}
