private void InsertNewItems(Ballroom ballroom, Dictionary <int, BallroomItem> newItems)
{
foreach (var item in newItems.Values)
{
ballroom.AddBallroomItem(item);
}
}
public void ProcessLayout(Ballroom ballroom, List <BallroomItem> viewItems)
{
var itemsDict = viewItems.ToDictionary(x => x.Id, y => y);
ProcessBallroomItems(ballroom, itemsDict);
InsertNewItems(ballroom, itemsDict); // list of items in this step is decreased by items that were used to update existing entities
}
public void SaveLayout(string userId, Ballroom fromView)
{
var entity = _ballroomRepository.Find(userId).IfNull(() => CreateBallroom(userId));
entity.Update(fromView);
_layoutService.ProcessLayout(entity, fromView.BallroomItems);
_unitOfWork.Save();
}
private Ballroom CreateBallroom(string userId)
{
var ballroom = new Ballroom
{
UserId = userId, // user id must be added in this step
BallroomItems = new List <BallroomItem>() // list has to be created to add new items
};
_ballroomRepository.Insert(ballroom);
return(ballroom);
}
private void ProcessBallroomItems(Ballroom ballroom, Dictionary <int, BallroomItem> viewItems)
{
for (var i = ballroom.BallroomItems.Count - 1; i >= 0; i--) // since items can be removed from list - start iterating from the end of the list
{
var item = ballroom.BallroomItems[i];
BallroomItem newItem;
(viewItems.TryGetValue(item.Id, out newItem)).IfTrueOrFalse(() =>
{
UpdateItem(item, newItem);
viewItems.Remove(newItem.Id); // and remove from items passed from the view
},
() => DeleteItem(item));
}
}
public BallroomModel MapBallroomEntity(Ballroom entity)
{
return(Mapper.Map <Ballroom, BallroomModel>(entity));
}