/**
  * Set the status message displayed to the user for a course
  * @param  integer $course_id ID of course
  * @param  integer $user_id   ID of user
  * @return array              Status code and message
  */
 public static function sensei_user_course_status_message($course_id = 0, $user_id = 0)
 {
     if (intval($user_id) == 0) {
         $user_id = get_current_user_id();
     }
     $status = 'not_started';
     $box_class = 'info';
     $message = __('You have not started this course yet.', 'woothemes-sensei');
     if ($course_id > 0 && $user_id > 0) {
         $started_course = WooThemes_Sensei_Utils::user_started_course($course_id, $user_id);
         if ($started_course) {
             $passmark = WooThemes_Sensei_Utils::sensei_course_pass_grade($course_id);
             // This happens inside sensei_user_passed_course()!
             $user_grade = WooThemes_Sensei_Utils::sensei_course_user_grade($course_id, $user_id);
             // This happens inside sensei_user_passed_course()!
             if ($user_grade >= $passmark) {
                 $status = 'passed';
                 $box_class = 'tick';
                 $message = sprintf(__('You have passed this course with a grade of %1$d%%.', 'woothemes-sensei'), $user_grade);
             } else {
                 $status = 'failed';
                 $box_class = 'alert';
                 $message = sprintf(__('You require %1$d%% to pass this course. Your grade is %2$s%%.', 'woothemes-sensei'), $passmark, $user_grade);
             }
         }
     }
     $message = apply_filters('sensei_user_course_status_' . $status, $message);
     return array('status' => $status, 'box_class' => $box_class, 'message' => $message);
 }