BuddyPress.org

Hi, I want to create custom buddypress notification, please guide me how can I create that.

After lots of research I tried below code, which has not worked.

$globals = array( 
            'path'          => BP_PLUGIN_DIR, 
            'slug'          => BP_MEMBERS_SLUG, 
            'root_slug'     => isset( $bp->pages->members->slug ) ? $bp->pages->members->slug : BP_MEMBERS_SLUG, 
            'has_directory' => true, 
            'search_string' => __( 'Search Members...', 'buddypress' ), 
            'notification_callback' => 'bp_members_format_notifications', // here we indicate our function 
        );

function bp_members_format_notifications( $action, $item_id, $secondary_item_id, $total_items, $format = 'string' ) { 
    global $bp; 
 
    switch ( $action ) { 
        case 'new_thanks': 
            // EXAMPLE of using $item_id and $secondary_item_id 
            $thanks_for      = $item_id; 
            $who_thanked     = $secondary_item_id; 
            // then you can use these variables to format output; I didn't do it in this example 
 
            $link = '/members/'.$bp->loggedin_user->userdata->user_nicename.'/'; 
            $return = '<a href="'.$link.'">You\'ve been thanked!</a>'; 
        break; 
    } 
 
    return $return; 
} 

$userid = $bp->loggedin_user->id;
bp_core_add_notification('', $userid, $bp->friends->id, 'new_thanks','Hi');

please guide me where I am doing mistake in above code.
Thanks