module IdPlease
  module ModelExtensions
    module ForGroup
      
      # TODO: come up with an object to represent the object here and just return that to the program
      # otherwise we just keep on coming back to edit this.
      def children(*args)
        options = args.extract_options!
        view = options[:view] || :subjects
        valid_views = [:subjects, :subject_hash, :roles, :role_hash, :role_with_assignments, :map]

        raise "Invalid view argument, must be one of #{valid_views}" unless valid_views.include?(view)

        map = IdPlease::AssignmentMap.new(:assignment_class => _auth_assign_class, :subjects => self, :nested => _auth_nested_groups && options[:nested] != false)
        
        map.send(view)
      end
      
      def has_role!(role_name, object = nil)
        if object && object.kind_of?(self.class) && role_name.to_s == _auth_group_role && self.children.include?(object)
          raise "Attempt to make circular membership loop"
        else
          super
        end
      end
    end
  end
end