configure if chat should be opened in an iframe or via button click

migrations/03_use_matrix_chat_iframe.php

+<?php
+
+/**
+ * Class UseMatrixChatIframe
+ * Configure whether to use an iFrame for Matrix chat.
+ * instead of a password.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * @author      Thomas Hackl <hackl@data-quest.de>
+ * @license     http://www.gnu.org/licenses/gpl-2.0.html GPL version 2
+ * @category    Matrix
+ */
+
+class UseMatrixChatIframe extends Migration
+{
+
+    public function description()
+    {
+        return 'Configure whether to use an iFrame for Matrix chat.';
+    }
+
+    public function up()
+    {
+        try {
+            Config::get()->create('MATRIX_USE_CHAT_IFRAME', [
+                'value' => '',
+                'type' => 'boolean',
+                'range' => 'global',
+                'section' => 'matrix',
+                'description' => 'Soll der Matrixchat in einem iFrame in Stud.IP geöffnet werden?'
+            ]);
+        } catch (Exception $e) {
+        }
+
+    }
+
+    public function down()
+    {
+        // Remove config entry.
+        Config::get()->delete('MATRIX_USE_CHAT_IFRAME');
+    }
+
+}
\ No newline at end of file

plugin.manifest

 pluginname=Matrix-Chat
 pluginclassname=MatrixPlugin
 origin=data-quest
-version=0.96
+version=1.0
 screenshot=assets/images/matrix_logo.png
 description=Matrix chat for Stud.IP courses
 studipMinVersion=4.5

views/matrix_chat/index.php

@@ -45,11 +45,15 @@
         <?= Assets::img('ajax-indicator-black.svg') ?>
     </div>
 <? elseif (!$noChat) : ?>
-    <div class="matrix-chat-button">
-        <?= Studip\LinkButton::create(
-                dgettext('matrix', 'Chat öffnen'),
-                Config::get()->MATRIX_CHATSERVER_URL,
-                ['target' => '_blank']
-        ) ?>
-    </div>
+    <? if (!Config::get()->MATRIX_USE_CHAT_IFRAME) : ?>
+        <iframe src="<?= Config::get()->MATRIX_CHATSERVER_URL ?>" width="100%" height="100%"></iframe>
+    <? else : ?>
+        <div class="matrix-chat-button">
+            <?= Studip\LinkButton::create(
+                    dgettext('matrix', 'Chat öffnen'),
+                    Config::get()->MATRIX_CHATSERVER_URL,
+                    ['target' => '_blank']
+            ) ?>
+        </div>
+    <? endif ?>
 <? endif;