/**
  * Course created event.
  */
 public static function course_created(\core\event\course_created $event)
 {
     global $DB;
     $course = $DB->get_record('course', array('id' => $event->objectid));
     $category = new \tool_cat\category($course->category);
     $rules = $category->get_rules();
     foreach ($rules as $rule) {
         $rule->apply(array($course));
     }
 }