BuddyPress.org

WordPress 4.5.2
BuddyPress 2.5.2
Theme: Twenty Sixteen

I try sorting memberl list in certaine papameters:

• Is online;
• Is custom field;
• Is user friends first.

Fist & second params is done.

Thirds condition i try to resolve with this method
Me class variant
In a wp-content/plugins/buddypress/bp-templates/bp-legacy/buddypress/members/members-loop.php

 
$user_id = bp_loggedin_user_id();
$friends = friends_get_friend_user_ids($user_id);
function display_friends_online($friends){
  $result = [];
  foreach ($friends as $friend_item) {
    if ( bp_has_members( 'type=online&include='.$friend_item)) {
	  $result["$friend_item"] = $friend_item;
	}
    }
    if (count($result) > 0)
    {
     return count($result);
    }
    else
    {
      return 0;
    }

}
$class_members = new BP_Custom_User_Ids(display_friends_online($friends));

I debugged code in xDebug and found that sorts by default its output system kernel.

Friends not first in list.
Please help!