From 7c97d8549cb49a4e90e1f71df44361a95f8e6f9d Mon Sep 17 00:00:00 2001
From: Paul Holden <paulh@moodle.com>
Date: Wed, 15 Jan 2025 14:01:17 +0000
Subject: [PATCH] MDL-84214 mod_bigbluebuttonbn: fix default presentation file
 serving.

---
 mod/bigbluebuttonbn/classes/local/helpers/files.php | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/mod/bigbluebuttonbn/classes/local/helpers/files.php b/mod/bigbluebuttonbn/classes/local/helpers/files.php
index dddce8d1b52..19730cd3779 100644
--- a/mod/bigbluebuttonbn/classes/local/helpers/files.php
+++ b/mod/bigbluebuttonbn/classes/local/helpers/files.php
@@ -251,9 +251,12 @@ class files {
         } else {
             require_login(null, true, $cm, true, true);
         }
-        if (!has_capability('mod/bigbluebuttonbn:join', $context)) {
+
+        // If the file belongs to a course module, ensure user can join the activity.
+        if ($cm !== null && !has_capability('mod/bigbluebuttonbn:join', $context)) {
             return null;
         }
+
         return implode('/', $args);
     }