switch listener to hook

appinfo/application.php

@@ -35,6 +35,7 @@
 use OCA\Onlyoffice\Controller\EditorController;
 use OCA\Onlyoffice\Controller\SettingsController;
 use OCA\Onlyoffice\Crypt;
+use OCA\Onlyoffice\Hookhandler;
 
 class Application extends App {
 
@@ -70,12 +71,7 @@ function() {
                 }
             });
 
-        $eventDispatcher->addListener("OCA\Files_Sharing::loadAdditionalScripts",
-            function() {
-                if (!empty($this->appConfig->GetDocumentServerUrl()) && $this->appConfig->SettingsAreSuccessful()) {
-                    Util::addScript("onlyoffice", "public");
-                }
-            });
+        Util::connectHook("OCP\Share", "share_link_access", Hookhandler::class, "PublicPage");
 
         require_once __DIR__ . "/../3rdparty/jwt/BeforeValidException.php";
         require_once __DIR__ . "/../3rdparty/jwt/ExpiredException.php";

lib/hookhandler.php

@@ -0,0 +1,46 @@
+<?php
+/**
+ * @author Jörn Friedrich Dreyer <jfd@butonic.de>
+ *
+ * @copyright Copyright (c) 2018, ownCloud GmbH
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License, version 3,
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+namespace OCA\Onlyoffice;
+
+use OCP\Util;
+
+use OCA\Onlyoffice\AppConfig;
+
+/**
+ * Class HookHandler
+ * 
+ * handles hooks
+ *
+ * @package OCA\Onlyoffice
+ */
+class HookHandler {
+
+    public static function PublicPage() {
+        $appName = "onlyoffice";
+
+        $appConfig = new AppConfig($appName);
+
+        if (!empty($appConfig->GetDocumentServerUrl()) && $appConfig->SettingsAreSuccessful()) {
+            Util::addScript("onlyoffice", "public");
+        }
+    }
+}