From 053785ff5fea13daf2feb8ca64d2df8cac079eb8 Mon Sep 17 00:00:00 2001
From: Ilya Tregubov <ilya@moodle.com>
Date: Tue, 15 Mar 2022 16:08:51 +0600
Subject: [PATCH] MDL-74205 navigation: Don't show participants link to user if
 he has no permission.

---
 .../tests/behat/participants_link.feature     | 29 +++++++++++++++++++
 lib/navigationlib.php                         |  4 +--
 2 files changed, 31 insertions(+), 2 deletions(-)

diff --git a/blocks/navigation/tests/behat/participants_link.feature b/blocks/navigation/tests/behat/participants_link.feature
index f08ce38d867..a66edbcdd0c 100644
--- a/blocks/navigation/tests/behat/participants_link.feature
+++ b/blocks/navigation/tests/behat/participants_link.feature
@@ -37,6 +37,35 @@ Feature: Displaying the link to the Participants page
     And "Student One" "link" should exist
     And "Student Two" "link" should not exist
 
+  @javascript
+  Scenario: Course participants link is displayed to users depending on role permissions settings
+    And I log in as "admin"
+    And I am on "Course1" course homepage with editing mode on
+    And I add a "Forum" to section "1" and I fill the form with:
+      | Forum name | Test forum name |
+      | Description | Test forum description |
+    And I am on the "Course1" "enrolment methods" page
+    And I click on "Edit" "link" in the "Guest access" "table_row"
+    And I set the following fields to these values:
+      | Allow guest access | Yes |
+    And I press "Save changes"
+    And I log out
+    When I log in as "guest"
+    And I am on "Course1" course homepage
+    Then I should not see "Participants" in the "Navigation" "block"
+    And I am on the "Test forum name" "forum activity" page
+    And I should not see "Participants" in the "Navigation" "block"
+    And I log out
+    And I log in as "admin"
+    And I set the following system permissions of "Guest" role:
+      | capability                     | permission |
+      | moodle/course:viewparticipants | Allow      |
+    And I log in as "guest"
+    And I am on "Course1" course homepage
+    And I should see "Participants" in the "Navigation" "block"
+    And I am on the "Test forum name" "forum activity" page
+    And I should see "Participants" in the "Navigation" "block"
+
   Scenario: Site participants link is displayed to admins
     When I log in as "admin"
     Then "Participants" "link" should exist in the "Navigation" "block"
diff --git a/lib/navigationlib.php b/lib/navigationlib.php
index 6140cf90d65..b27722301e3 100644
--- a/lib/navigationlib.php
+++ b/lib/navigationlib.php
@@ -2939,8 +2939,8 @@ class global_navigation extends navigation_node {
             if ($navoptions->notes) {
                 $participants->add(get_string('notes', 'notes'), new moodle_url('/notes/index.php', array('filtertype' => 'course', 'filterselect' => $course->id)), self::TYPE_SETTING, null, 'currentcoursenotes');
             }
-        } else if (count($this->extendforuser) > 0 || $this->page->course->id == $course->id) {
-            $participants = $coursenode->add(get_string('participants'), null, self::TYPE_CONTAINER, get_string('participants'), 'participants');
+        } else if (count($this->extendforuser) > 0) {
+            $coursenode->add(get_string('participants'), null, self::TYPE_CONTAINER, get_string('participants'), 'participants');
         }
 
         // Badges.