Tutors only can chat with students when course_chat_restrict_to_coach is enabled - refs BT#13885

main/inc/lib/CourseChatUtils.php

@@ -53,9 +53,9 @@ class CourseChatUtils
             $userIsCoach = api_is_course_session_coach($this->userId, $course->getId(), $session->getId());
 
             if (api_get_configuration_value('course_chat_restrict_to_coach')) {
-                if (!$userIsCoach) {
+                if ($userIsCoach) {
                     $criteria->andWhere(
-                        Criteria::expr()->eq('status', Session::COACH)
+                        Criteria::expr()->eq('status', Session::STUDENT)
                     );
                 }
             }

main/install/configuration.dist.php

@@ -732,4 +732,5 @@ $_configuration['gradebook_badge_sidebar'] = [
 //INSERT INTO settings_options (variable, value, display_text) VALUES ('allow_registration', 'confirmation', 'MailConfirmation');
 // ------ (End) Custom DB changes
 // Restrict course chat only for course coach in sessions
+// Course coaches will can chat with students only. And students will can chat with all course coaches
 //$_configuration['course_chat_restrict_to_coach'] = false;