From 2c1363e6227ee029d7aaf12fac418c5a2fac3254 Mon Sep 17 00:00:00 2001
From: dongsheng <dongsheng>
Date: Mon, 21 Jul 2008 09:20:40 +0000
Subject: [PATCH] MDL-15317, when forum is invisible, only users with
 'mod/forum:managesubscriptions' capability can subscrib forum, merged from
 MOODLE_19_STABLE.

---
 mod/forum/index.php | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/mod/forum/index.php b/mod/forum/index.php
index cb91e8b8cc..6b4332c047 100644
--- a/mod/forum/index.php
+++ b/mod/forum/index.php
@@ -116,14 +116,23 @@
             $learningforums[$forum->id] = $forum;
         }
     }
-
+                                        
     /// Do course wide subscribe/unsubscribe
     if (!is_null($subscribe) and !isguestuser() and !isguest()) {
         foreach ($modinfo->instances['forum'] as $forumid=>$cm) {
             $forum = $forums[$forumid];
+            $cansub = false;
+            if (has_capability('mod/forum:viewdiscussion', $cm)) {
+                $cansub = true;
+            }
+            if ($cansub && $cm->visible == 0 &&
+                !has_capability('mod/forum:managesubscriptions', $cm)) 
+            {
+                $cansub = false;
+            }
             if (!forum_is_forcesubscribed($forum)) {
                 $subscribed = forum_is_subscribed($USER->id, $forum);
-                if ($subscribe && !$subscribed) {
+                if ($subscribe && !$subscribed && $cansub) {
                     forum_subscribe($USER->id, $forumid);
                 } else if (!$subscribe && $subscribed) {
                     forum_unsubscribe($USER->id, $forumid);
-- 
2.39.5