public static function view_course($courseid, $sectionnumber = 0) {
        global $CFG;
        require_once($CFG->dirroot . "/course/lib.php");

        $params = self::validate_parameters(self::view_course_parameters(),
                                            array(
                                                'courseid' => $courseid,
                                                'sectionnumber' => $sectionnumber
                                            ));

        $warnings = array();

        $course = get_course($params['courseid']);
        $context = context_course::instance($course->id);
        self::validate_context($context);

        if (!empty($params['sectionnumber'])) {

            // Get section details and check it exists.
            $modinfo = get_fast_modinfo($course);
            $coursesection = $modinfo->get_section_info($params['sectionnumber'], MUST_EXIST);

            // Check user is allowed to see it.
            if (!$coursesection->uservisible) {
                require_capability('moodle/course:viewhiddensections', $context);
            }
        }

        course_view($context, $params['sectionnumber']);

        $result = array();
        $result['status'] = true;
        $result['warnings'] = $warnings;
        return $result;
    }