Cacher is the code snippet organizer for pro developers

//Insert profile link into trail on create diary page
  function theme_add_to_trail_on_create_diary_entry($trail) {
    if (is_page_template('custom-template.php')) {
      
      $home = $trail->breadcrumbs[0];
      $current_page = $trail->breadcrumbs[1];

      $profile = new bcn_breadcrumb(__('Profile','domain'), NULL, array('c-breadcrumbs__item'), get_author_posts_url(get_current_user_id()));
      // $trail->add($profile) always inserts in the beginning
      $trail->breadcrumbs = array($home, $profile, $current_page);
    }
  }

  add_action('bcn_after_fill', 'theme_add_to_trail_on_create_diary_entry');