the rich! ramblings

What else could you do with this simple my_is_friend_check function?

How about removing activity stream postings from non-friends all together (except public groups)

See our previous: #BuddyPress hack: remove new member registration from activity stream

function my_denied_activity_nonfriends( $a, $activities ) {
 global $bp;

 //if admin we want to know
 if ( is_site_admin() )
 return $activities;

 foreach ( $activities->activities as $key => $activity ) {
 /* if member of a group - we want the activity even if nonfriend */
 if ( $activity->user_id != $bp->loggedin_user->id && $activity->component != 'groups' && $activity->component != 'blogs' && $activity->user_id != 0 && !my_is_friend_check($activity->user_id) && !my_is_follower_check($activity->user_id) && !my_is_atme_check($activity->content) ) {

 unset( $activities->activities[$key] );

 $activities->activity_count = $activities->activity_count-1;
 $activities->total_activity_count = $activities->total_activity_count-1;
 $activities->pag_num = $activities->pag_num -1;

 }
 }

 /* Renumber the array keys to account for missing items */
 $activities_new = array_values( $activities->activities );
 $activities->activities = $activities_new;

 return $activities;
}
add_action( 'bp_has_activities', 'my_denied_activity_nonfriends', 10, 2 );

Plus quick check functions – friend, nonfriend but made atme mention, follower ?

function my_is_atme_check( $content ) {
 global $bp;

 if ( !is_user_logged_in() )
 return false;

 if (!$content)
 return false;

 $pattern = '/[@]+([A-Za-z0-9-_]+)/';
 preg_match_all( $pattern, $content, $usernames );

 /* Make sure there's only one instance of each username */
 if ( !$usernames = array_unique( $usernames[1] ) )
 return false;

 if ( in_array( bp_core_get_username( $bp->loggedin_user->id ), $usernames ) )
 return true;

 return false;
}

function my_is_friend_check( $friend_id = false) {
 global $bp;

 if ( !is_user_logged_in() )
 return false;

 if ( is_site_admin() )
 return true;

 if ( !$friend_id ) {
 $potential_friend_id = $bp->displayed_user->id;
 } else {
 $potential_friend_id = $friend_id;
 }

 if ( $bp->loggedin_user->id == $potential_friend_id )
 return false;

 if ( friends_check_friendship_status($bp->loggedin_user->id, $potential_friend_id) == 'is_friend' )
 return true;

 return false;
}

function my_is_follower_check( $friend_id = false) {
 global $bp;

 if ( !is_user_logged_in() )
 return false;

 if ( is_site_admin() )
 return true;

 if ( !$friend_id ) {
 $potential_friend_id = $bp->displayed_user->id;
 } else {
 $potential_friend_id = $friend_id;
 }

 if ( $bp->loggedin_user->id == $potential_friend_id )
 return false;

 if ( bp_follow_is_following( array( 'leader_id' => $potential_friend_id, 'follower_id' => $bp->loggedin_user->id ) ) )
 return true;
}