don't offer metadata refresh button for students

Author: tgloeggl

views/course/_episode.php

@@ -233,16 +233,16 @@ class="<?= ($item['visibility'] != 'false') ? 'oce_item' : 'hidden_ocvideodiv oc
                                     </div>
                                 <? endif ?>
 
-                                <?= Studip\LinkButton::create(
-                                    $_('Metadaten neu laden'),
-                                    $controller->url_for('course/refresh_episode/' . get_ticket() . '/' . $item['id']),
-                                    [
-                                        'class'   => 'oc_refresh',
-                                        'title'   => $_('Metadaten von Opencast aktualisieren')
-                                    ]
-                                ); ?>
-
                                 <? if (OCPerm::editAllowed($course_id)) : ?>
+                                    <?= Studip\LinkButton::create(
+                                        $_('Metadaten neu laden'),
+                                        $controller->url_for('course/refresh_episode/' . get_ticket() . '/' . $item['id']),
+                                        [
+                                            'class'   => 'oc_refresh',
+                                            'title'   => $_('Metadaten von Opencast aktualisieren')
+                                        ]
+                                    ); ?>
+
                                     <?= Studip\LinkButton::create(
                                         $_('Entfernen'),
                                         $controller->url_for('course/remove_episode/' . get_ticket() . '/' . $item['id']),