protected virtual void OnItemCreating(ItemEventArgs e)
{
EventHandler <ItemEventArgs> handler = base.Events[EventItemCreating] as EventHandler <ItemEventArgs>;
if (handler != null)
{
handler.Invoke(this, e);
}
if (e.AffectedItem != null)
{
IDefinitionManager definitions = Engine.Definitions;
ISecurityManager security = Engine.SecurityManager;
ContentActivator activator = Engine.Resolve <ContentActivator>();
ItemDefinition parentDefinition = definitions.GetDefinition(parentItem);
if (parentDefinition.IsChildAllowed(definitions, parentItem, parentDefinition))
{
e.AffectedItem = Engine.Resolve <ContentActivator>().CreateInstance(parentItem.GetContentType(), parentItem);
return;
}
foreach (ItemDefinition definition in definitions.GetAllowedChildren(parentItem, null).WhereAuthorized(security, HttpContext.Current.User, parentItem))
{
e.AffectedItem = activator.CreateInstance(definition.ItemType, parentItem);
return;
}
throw new N2.Definitions.NoItemAllowedException(parentItem);
}
}
public void RestrictParentsAttribute_WithNoneAllowed_DisallowsAdd()
{
ItemDefinition parentDefinition = engine.Definitions.GetDefinition(typeof(ItemWithDetails)); // allows child ItemInZone1Or2, restricts parent ItemInZone1Or2
ItemDefinition childDefinition2 = engine.Definitions.GetDefinition(typeof(SideshowItem)); // allows no parents
bool itemWithDetailsAllowsSideshowItemAsChild = parentDefinition.IsChildAllowed(engine.Definitions, new ItemWithDetails(), childDefinition2);
Assert.IsFalse(itemWithDetailsAllowsSideshowItemAsChild);
}
public void AllowedChildrenAttribute_AllowsDefinedTypes()
{
ItemDefinition parentDefinition = engine.Definitions.GetDefinition(typeof(ItemWithDetails)); // allows child ItemInZone1Or2, restricts parent ItemInZone1Or2
ItemDefinition childDefinition1 = engine.Definitions.GetDefinition(typeof(ItemInZone1Or2)); // -
bool itemWithDetailsAllowsItemInZone1Or2AsChild = parentDefinition.IsChildAllowed(engine.Definitions, new ItemWithDetails(), childDefinition1);
Assert.IsTrue(itemWithDetailsAllowsItemInZone1Or2AsChild);
}
/// <summary>Check if an item can be created.</summary>
/// <param name="item"></param>
/// <param name="parent"></param>
/// <returns>The exception that would be thrown if the item was created.</returns>
public Exception GetCreateException(ContentItem item, ContentItem parent)
{
ItemDefinition parentDefinition = definitions.GetDefinition(parent);
ItemDefinition itemDefinition = definitions.GetDefinition(item);
if (parentDefinition == null)
{
throw new InvalidOperationException("Couldn't find a definition for the parent item '" + parent + "' of type '" + parent.GetContentType() + "'");
}
if (itemDefinition == null)
{
throw new InvalidOperationException("Couldn't find a definition for the item '" + item + "' of type '" + item.GetContentType() + "'");
}
if (!parentDefinition.IsChildAllowed(definitions, parent, itemDefinition))
{
return(new NotAllowedParentException(itemDefinition, parent.GetContentType()));
}
return(null);
}