Make sure we only load the public script on public pages

Signed-off-by: John Molakvoæ (skjnldsv) <skjnldsv@protonmail.com>

lib/AppInfo/Application.php

@@ -28,14 +28,17 @@
 namespace OCA\Files_PDFViewer\AppInfo;
 
 use OCA\Files_PDFViewer\Listeners\CSPListener;
+use OCA\Files_PDFViewer\Listeners\LoadPublicViewerListener;
 use OCA\Files_PDFViewer\Listeners\LoadViewerListener;
+
 use OCA\Viewer\Event\LoadViewer;
+
 use OCP\AppFramework\App;
 use OCP\AppFramework\Bootstrap\IBootContext;
 use OCP\AppFramework\Bootstrap\IBootstrap;
 use OCP\AppFramework\Bootstrap\IRegistrationContext;
+use OCP\AppFramework\Http\Events\BeforeTemplateRenderedEvent;
 use OCP\Security\CSP\AddContentSecurityPolicyEvent;
-use OCP\Util;
 
 class Application extends App implements IBootstrap {
 	public const APP_ID = 'files_pdfviewer';
@@ -46,10 +49,10 @@ public function __construct() {
 
 	public function register(IRegistrationContext $context): void {
 		$context->registerEventListener(LoadViewer::class, LoadViewerListener::class);
+		$context->registerEventListener(BeforeTemplateRenderedEvent::class, LoadPublicViewerListener::class);
 		$context->registerEventListener(AddContentSecurityPolicyEvent::class, CSPListener::class);
 	}
 
 	public function boot(IBootContext $context): void {
-		Util::addScript(self::APP_ID, 'files_pdfviewer-public');
 	}
 }

lib/Listeners/LoadPublicViewerListener.php

@@ -0,0 +1,48 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright Copyright (c) 2020 John Molakvoæ <skjnldsv@protonmail.com>
+ *
+ * @author John Molakvoæ <skjnldsv@protonmail.com>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * 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
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace OCA\Files_PDFViewer\Listeners;
+
+use OCA\Files_PDFViewer\AppInfo\Application;
+use OCP\AppFramework\Http\Events\BeforeTemplateRenderedEvent;
+use OCP\AppFramework\Http\TemplateResponse;
+use OCP\EventDispatcher\Event;
+use OCP\EventDispatcher\IEventListener;
+use OCP\Util;
+
+class LoadPublicViewerListener implements IEventListener {
+	public function handle(Event $event): void {
+		if (!$event instanceof BeforeTemplateRenderedEvent) {
+			return;
+		}
+
+		// Make sure we are on a public page rendering
+		if ($event->getResponse()->getRenderAs() !== TemplateResponse::RENDER_AS_PUBLIC) {
+			return;
+		}
+		Util::addScript(Application::APP_ID, 'files_pdfviewer-public');
+	}
+}