- 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/Controller/SettingsController.php

@@ -0,0 +1,60 @@
+<?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\Controller;
+
+use OCA\Files_Reader\AppInfo\Application;
+
+use OCP\IL10N;
+use OCP\IConfig;
+use OCP\IRequest;
+use OCP\AppFramework\Controller;
+use OCP\AppFramework\Http\DataResponse;
+
+class SettingsController extends Controller {
+    protected IConfig $config;
+    protected Il10n $l10n;
+    protected string $userId;
+
+    public function __construct(
+        IRequest $request,
+        IConfig $config,
+        string $userId,
+        IL10N $l10n) {
+                parent::__construct(Application::APP_ID, $request);
+                $this->config = $config;
+                $this->userId = $userId;
+                $this->l10n = $l10n;
+        }
+
+        public function personal(string $epub_enable, string $pdf_enable, string $cbx_enable) {
+
+                $this->config->setUserValue(
+                        $this->userId, Application::APP_ID, 'epub_enable', $epub_enable
+                );
+
+                $this->config->setUserValue(
+                        $this->userId, Application::APP_ID, 'pdf_enable', $pdf_enable
+                );
+
+                $this->config->setUserValue(
+                        $this->userId, Application::APP_ID, 'cbx_enable', $cbx_enable
+                );
+
+                return new DataResponse([
+                        'data' => [
+                                'message' => $this->l10n->t('Your settings have been updated.'),
+                        ],
+                ]);
+        }
+}