- Migrated from https://github.com/Yetangitu/owncloud-apps

- substantial bit rot accrued in 4 years of non-maintenance which made Reader unusable
 - Reader now works reliably on public pages - or at least it _Works For Me™_

 - Refactored a substantial part of the code to comply to the "current" (ha ha) Nextcloud API
 - Dropped Owncloud compatibility for lack of a testing installation
 - Dropped IE (<11) support
 - Dropped compatibility with older (<20) Nextcloud versions
 - Dropped app-specific ajax code, now handled by SettingsController
 - Updated dependencies where applicable

lib/AppInfo/Application.php

@@ -0,0 +1,51 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @author Frank de Lange
+ * @copyright 2022 Frank de Lange
+ *
+ * This file is licensed under the Affero General Public License version 3 or
+ * later.
+ * See the COPYING-README file.
+ */
+
+namespace OCA\Files_Reader\AppInfo;
+
+use OCA\Files_Reader\Hooks;
+use OCA\Files_Reader\Listeners\CSPListener;
+use OCA\Files_Reader\Listeners\LoadPublicViewerListener;
+use OCA\Files_Reader\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;
+
+class Application extends App implements IBootstrap {
+        public const APP_ID = 'files_reader';
+
+        public function __construct() {
+                parent::__construct(self::APP_ID);
+	}
+
+        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 registerPersonalSettings() {
+                \OCP\App::registerPersonal(self::APP_ID, 'personal');
+        }
+
+        public function boot(IBootContext $context): void {
+		Hooks::register();
+        }
+}
+