/// <summary>
/// Moves source under specified destination item.
/// If destination is inside of source tree it will throw exception.
/// </summary>
/// <param name="source"> Source item. </param>
/// <param name="destination"> Destination item. </param>
/// <param name="position"> <see cref="HierarchyMovePosition" /> value </param>
public static void MoveTo(this IHierarchy source, IHierarchy destination, HierarchyMovePosition position)
{
if (source == null)
{
throw new ArgumentNullException("source");
}
if (destination == null)
{
throw new ArgumentNullException("destination");
}
if (source.IsEqualOrChildOf(destination))
{
throw new HierarchyException("Source entity cannot be a parent or sibling to itself or its child.");
}
switch (position)
{
case HierarchyMovePosition.Over:
source.Parent = destination;
source.Ordinal = destination.Children.Max(x => x.Ordinal) + 1;
Reindex(destination.Parent.Children);
return;
case HierarchyMovePosition.After:
source.Parent = destination.Parent;
// todo: Ordinal property has to be set here
if (destination.Parent != null)
{
Reindex(destination.Parent.Children);
}
break;
case HierarchyMovePosition.Before:
source.Parent = destination.Parent;
if (destination.Parent != null)
{
Reindex(destination.Parent.Children);
}
// todo: Ordinal property has to be set here
break;
}
}