From 112ecf68ba729773c9ecb4fef0fc4a14bfd3f73a Mon Sep 17 00:00:00 2001
From: Petr Skoda <commits@skodak.org>
Date: Sat, 10 Mar 2012 09:40:42 +0100
Subject: [PATCH 1/2] MDL-31595 do not show enrolee link to guest account

---
 lib/enrollib.php | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/enrollib.php b/lib/enrollib.php
index 0b5e701d13a..4ff0a19eca9 100644
--- a/lib/enrollib.php
+++ b/lib/enrollib.php
@@ -470,7 +470,9 @@ function enrol_add_course_navigation(navigation_node $coursenode, $course) {
 
     if ($course->id != SITEID) {
         // Unenrol link
-        if (is_enrolled($coursecontext)) {
+        if (isguestuser() or !isloggedin()) {
+            // guest account can not be enrolled
+        } else if (is_enrolled($coursecontext)) {
             foreach ($instances as $instance) {
                 if (!isset($plugins[$instance->enrol])) {
                     continue;

From 96b421fd91a070ef83467915971f9cae1e6e32b3 Mon Sep 17 00:00:00 2001
From: Petr Skoda <commits@skodak.org>
Date: Mon, 12 Mar 2012 16:47:28 +0100
Subject: [PATCH 2/2] MDL-31595 improve enrol link comments

---
 lib/enrollib.php | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/lib/enrollib.php b/lib/enrollib.php
index 4ff0a19eca9..5d7f3759fc6 100644
--- a/lib/enrollib.php
+++ b/lib/enrollib.php
@@ -469,10 +469,10 @@ function enrol_add_course_navigation(navigation_node $coursenode, $course) {
     $usersnode->trim_if_empty();
 
     if ($course->id != SITEID) {
-        // Unenrol link
         if (isguestuser() or !isloggedin()) {
-            // guest account can not be enrolled
+            // guest account can not be enrolled - no links for them
         } else if (is_enrolled($coursecontext)) {
+            // unenrol link if possible
             foreach ($instances as $instance) {
                 if (!isset($plugins[$instance->enrol])) {
                     continue;
@@ -486,6 +486,7 @@ function enrol_add_course_navigation(navigation_node $coursenode, $course) {
                 }
             }
         } else {
+            // enrol link if possible
             if (is_viewing($coursecontext)) {
                 // better not show any enrol link, this is intended for managers and inspectors
             } else {