Merge pull request #115 from lucaboesch/codechecker_501

Code checker and README.md badge.

Author: danmarsden

README.md

@@ -1,7 +1,7 @@
 Subcourse module for Moodle
 ===========================
 
-![Moodle Plugin CI](https://github.com/catalyst/moodle-mod_subcourse/workflows/Moodle%20Plugin%20CI/badge.svg)
+[![ci](https://github.com/catalyst/moodle-mod_subcourse/actions/workflows/moodle-ci.yml/badge.svg)](https://github.com/catalyst/moodle-mod_subcourse/actions/workflows/moodle-ci.yml)
 
 This Moodle module provides very simple yet useful functionality. When added into a
 course, it behaves as a graded activity. The grade for each student is took from a

index.php

@@ -25,5 +25,8 @@
 require_once(dirname(dirname(dirname(__FILE__))) . '/config.php');
 
 $id = required_param('id', PARAM_INT);
-\core_courseformat\activityoverviewbase::redirect_to_overview_page($id, 'subcourse');
+$course = $DB->get_record('course', ['id' => $id], '*', MUST_EXIST);
+
+require_login($course);
 
+\core_courseformat\activityoverviewbase::redirect_to_overview_page($id, 'subcourse');