chamilo / chamilo-lms

        }

        // Adding new relationships

        if (!empty($new_items)) {

            foreach ($new_items as $course_id) {

                $course_info = api_get_course_info_by_id($course_id);

                if (!empty($user_list)) {

                    foreach ($user_list as $user_id) {

                        CourseManager::subscribe_user($user_id, $course_info['code']);

                    }

                }

                $params = array('course_id' => $course_id, 'usergroup_id' => $usergroup_id);

                Database::insert($this->usergroup_rel_course_table, $params);

            }

        }

    }

    /**

    public function unsubscribe_courses_from_usergroup($usergroup_id, $delete_items)

    {

        // Deleting items.

        if (!empty($delete_items)) {

            $user_list = self::get_users_by_usergroup($usergroup_id);

            foreach ($delete_items as $course_id) {

                $course_info = api_get_course_info_by_id($course_id);

                if (!empty($user_list)) {

                    foreach ($user_list as $user_id) {

                        CourseManager::unsubscribe_user($user_id, $course_info['code']);

                    }

                }

                Database::delete(

                    $this->usergroup_rel_course_table,

                    array('usergroup_id = ? AND course_id = ?' => array($usergroup_id, $course_id))

                );

            }

        }

    }

    /**