private void LoadEntitiesFromDatabase()
{
var loadedEntities = PlatformModuleEntities.GetPlatformModuleEntity(new PlatformModuleEntity {
Name = Name
});
if (loadedEntities != null)
{
Entities = loadedEntities;
}
}
/// <summary>
/// Adds item to the module and schedules a persistance action to store the data in the db.
/// The contract is that each item with Id = 0 is a new item to be created unless there is an item with the
/// same ItemId already read from the database. In that case the database object is used. Otherwise
/// a new platfrom item is created in the database.
/// </summary>
/// <param name="item"></param>
public virtual void AddItem(PlatformItem item)
{
if (item == null)
{
return;
}
var context = EntityContextFactory.CreateContext();
context.Attach(Entities);
if (item.Id == 0)
{
var previouslyAddedItem = PlatformModuleEntities.GetAll().SelectMany(a => a.PlatformItems).FirstOrDefault(b => b.ItemId == item.ItemId);
if (previouslyAddedItem != null)
{
context.Detach(previouslyAddedItem);
Entities.PlatformItems.Remove(previouslyAddedItem);
item.Id = item.ItemId;
context.Update(item);
}
else
{
item.Id = item.ItemId;
context.Add(item);
}
}
else
{
context.Attach(item);
}
item.AssociatedPlatformModuleEntity = Entities;
context.SaveEntityStateAsyncAndDispose();
Entities.PlatformItems.Add(item);
OverallItemCount++;
CurrentItemCountChangedEvent(this, new ItemCountChangedEventArgs(CurrentItemCount));
}
