private void Update(Group group)
{
group.LastUpdated = group.UtcNow;
this.groupRepository.Update(group);
}
public virtual IEnumerable<Group> GetDescendants(Group grp)
{
if (grp == null) throw new ArgumentNullException("group");
var children = GetChildren(grp);
var result = children;
foreach (var child in children)
{
result = result.Union(GetDescendants(child));
}
return result;
}
public virtual IEnumerable<Group> GetChildren(Group grp)
{
if (grp == null) throw new ArgumentNullException("group");
var ids = grp.Children.Select(x=>x.ChildGroupID).ToArray();
if (ids.Length == 0) return Enumerable.Empty<Group>();
return this.groupRepository.GetAll().Where(x => ids.Contains(x.ID));
}
void RemoveChildGroup(Group group, Guid childGroupID)
{
if (group == null) throw new ArgumentNullException("group");
if (group.ID == childGroupID) return;
var child = group.Children.SingleOrDefault(x => x.ChildGroupID == childGroupID);
if (child != null)
{
group.Children.Remove(child);
}
}