feat: add system address book settings in ui

apps/dav/composer/composer/autoload_classmap.php

@@ -295,6 +295,7 @@
     'OCA\\DAV\\Listener\\CalendarShareUpdateListener' => $baseDir . '/../lib/Listener/CalendarShareUpdateListener.php',
     'OCA\\DAV\\Listener\\CardListener' => $baseDir . '/../lib/Listener/CardListener.php',
     'OCA\\DAV\\Listener\\ClearPhotoCacheListener' => $baseDir . '/../lib/Listener/ClearPhotoCacheListener.php',
+    'OCA\\DAV\\Listener\\DavAdminSettingsListener' => $baseDir . '/../lib/Listener/DavAdminSettingsListener.php',
     'OCA\\DAV\\Listener\\OutOfOfficeListener' => $baseDir . '/../lib/Listener/OutOfOfficeListener.php',
     'OCA\\DAV\\Listener\\SubscriptionListener' => $baseDir . '/../lib/Listener/SubscriptionListener.php',
     'OCA\\DAV\\Listener\\TrustedServerRemovedListener' => $baseDir . '/../lib/Listener/TrustedServerRemovedListener.php',
@@ -357,6 +358,7 @@
     'OCA\\DAV\\Server' => $baseDir . '/../lib/Server.php',
     'OCA\\DAV\\ServerFactory' => $baseDir . '/../lib/ServerFactory.php',
     'OCA\\DAV\\Service\\AbsenceService' => $baseDir . '/../lib/Service/AbsenceService.php',
+    'OCA\\DAV\\Settings\\Admin\\SystemAddressBookSettings' => $baseDir . '/../lib/Settings/Admin/SystemAddressBookSettings.php',
     'OCA\\DAV\\Settings\\AvailabilitySettings' => $baseDir . '/../lib/Settings/AvailabilitySettings.php',
     'OCA\\DAV\\Settings\\CalDAVSettings' => $baseDir . '/../lib/Settings/CalDAVSettings.php',
     'OCA\\DAV\\SetupChecks\\NeedsSystemAddressBookSync' => $baseDir . '/../lib/SetupChecks/NeedsSystemAddressBookSync.php',

apps/dav/composer/composer/autoload_static.php

@@ -310,6 +310,7 @@ class ComposerStaticInitDAV
         'OCA\\DAV\\Listener\\CalendarShareUpdateListener' => __DIR__ . '/..' . '/../lib/Listener/CalendarShareUpdateListener.php',
         'OCA\\DAV\\Listener\\CardListener' => __DIR__ . '/..' . '/../lib/Listener/CardListener.php',
         'OCA\\DAV\\Listener\\ClearPhotoCacheListener' => __DIR__ . '/..' . '/../lib/Listener/ClearPhotoCacheListener.php',
+        'OCA\\DAV\\Listener\\DavAdminSettingsListener' => __DIR__ . '/..' . '/../lib/Listener/DavAdminSettingsListener.php',
         'OCA\\DAV\\Listener\\OutOfOfficeListener' => __DIR__ . '/..' . '/../lib/Listener/OutOfOfficeListener.php',
         'OCA\\DAV\\Listener\\SubscriptionListener' => __DIR__ . '/..' . '/../lib/Listener/SubscriptionListener.php',
         'OCA\\DAV\\Listener\\TrustedServerRemovedListener' => __DIR__ . '/..' . '/../lib/Listener/TrustedServerRemovedListener.php',
@@ -372,6 +373,7 @@ class ComposerStaticInitDAV
         'OCA\\DAV\\Server' => __DIR__ . '/..' . '/../lib/Server.php',
         'OCA\\DAV\\ServerFactory' => __DIR__ . '/..' . '/../lib/ServerFactory.php',
         'OCA\\DAV\\Service\\AbsenceService' => __DIR__ . '/..' . '/../lib/Service/AbsenceService.php',
+        'OCA\\DAV\\Settings\\Admin\\SystemAddressBookSettings' => __DIR__ . '/..' . '/../lib/Settings/Admin/SystemAddressBookSettings.php',
         'OCA\\DAV\\Settings\\AvailabilitySettings' => __DIR__ . '/..' . '/../lib/Settings/AvailabilitySettings.php',
         'OCA\\DAV\\Settings\\CalDAVSettings' => __DIR__ . '/..' . '/../lib/Settings/CalDAVSettings.php',
         'OCA\\DAV\\SetupChecks\\NeedsSystemAddressBookSync' => __DIR__ . '/..' . '/../lib/SetupChecks/NeedsSystemAddressBookSync.php',

apps/dav/lib/AppInfo/Application.php

@@ -57,6 +57,7 @@
 use OCA\DAV\Listener\CalendarShareUpdateListener;
 use OCA\DAV\Listener\CardListener;
 use OCA\DAV\Listener\ClearPhotoCacheListener;
+use OCA\DAV\Listener\DavAdminSettingsListener;
 use OCA\DAV\Listener\OutOfOfficeListener;
 use OCA\DAV\Listener\SubscriptionListener;
 use OCA\DAV\Listener\TrustedServerRemovedListener;
@@ -65,6 +66,7 @@
 use OCA\DAV\Search\ContactsSearchProvider;
 use OCA\DAV\Search\EventsSearchProvider;
 use OCA\DAV\Search\TasksSearchProvider;
+use OCA\DAV\Settings\Admin\SystemAddressBookSettings;
 use OCA\DAV\SetupChecks\NeedsSystemAddressBookSync;
 use OCA\DAV\SetupChecks\WebdavEndpoint;
 use OCA\DAV\UserMigration\CalendarMigrator;
@@ -85,6 +87,8 @@
 use OCP\Files\AppData\IAppDataFactory;
 use OCP\IUserSession;
 use OCP\Server;
+use OCP\Settings\Events\DeclarativeSettingsGetValueEvent;
+use OCP\Settings\Events\DeclarativeSettingsSetValueEvent;
 use OCP\User\Events\BeforeUserDeletedEvent;
 use OCP\User\Events\BeforeUserIdUnassignedEvent;
 use OCP\User\Events\OutOfOfficeChangedEvent;
@@ -212,6 +216,12 @@ public function register(IRegistrationContext $context): void {
 
 		$context->registerSetupCheck(NeedsSystemAddressBookSync::class);
 		$context->registerSetupCheck(WebdavEndpoint::class);
+
+		// register admin settings form and listener(s)
+		$context->registerDeclarativeSettings(SystemAddressBookSettings::class);
+		$context->registerEventListener(DeclarativeSettingsGetValueEvent::class, DavAdminSettingsListener::class);
+		$context->registerEventListener(DeclarativeSettingsSetValueEvent::class, DavAdminSettingsListener::class);
+
 	}
 
 	public function boot(IBootContext $context): void {

apps/dav/lib/Listener/DavAdminSettingsListener.php

@@ -0,0 +1,65 @@
+<?php
+
+declare(strict_types=1);
+/**
+ * SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+namespace OCA\DAV\Listener;
+
+use OCA\DAV\AppInfo\Application;
+use OCP\EventDispatcher\Event;
+use OCP\EventDispatcher\IEventListener;
+use OCP\IAppConfig;
+use OCP\Settings\Events\DeclarativeSettingsGetValueEvent;
+use OCP\Settings\Events\DeclarativeSettingsSetValueEvent;
+
+/** @template-implements IEventListener<DeclarativeSettingsGetValueEvent|DeclarativeSettingsSetValueEvent> */
+class DavAdminSettingsListener implements IEventListener {
+
+	public function __construct(
+		private IAppConfig $config,
+	) {
+	}
+
+	public function handle(Event $event): void {
+
+		/** @var DeclarativeSettingsGetValueEvent|DeclarativeSettingsSetValueEvent $event */
+		if ($event->getApp() !== Application::APP_ID) {
+			return;
+		}
+
+		if ($event->getFormId() !== 'dav-admin-system-address-book') {
+			return;
+		}
+
+		if ($event instanceof DeclarativeSettingsGetValueEvent) {
+			$this->handleGetValue($event);
+			return;
+		}
+
+		if ($event instanceof DeclarativeSettingsSetValueEvent) {
+			$this->handleSetValue($event);
+			return;
+		}
+
+	}
+
+	private function handleGetValue(DeclarativeSettingsGetValueEvent $event): void {
+
+		if ($event->getFieldId() === 'system_addressbook_enabled') {
+			$event->setValue((int)$this->config->getValueBool('dav', 'system_addressbook_exposed', true));
+		}
+
+	}
+
+	private function handleSetValue(DeclarativeSettingsSetValueEvent $event): void {
+
+		if ($event->getFieldId() === 'system_addressbook_enabled') {
+			$this->config->setValueBool('dav', 'system_addressbook_exposed', (bool)$event->getValue());
+			$event->stopPropagation();
+		}
+
+	}
+
+}

apps/dav/lib/Settings/Admin/SystemAddressBookSettings.php

@@ -0,0 +1,43 @@
+<?php
+
+declare(strict_types=1);
+/**
+ * SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+namespace OCA\DAV\Settings\Admin;
+
+use OCP\IL10N;
+use OCP\Settings\DeclarativeSettingsTypes;
+use OCP\Settings\IDeclarativeSettingsForm;
+
+class SystemAddressBookSettings implements IDeclarativeSettingsForm {
+
+	public function __construct(
+		private IL10N $l,
+	) {
+	}
+
+	public function getSchema(): array {
+		return [
+			'id' => 'dav-admin-system-address-book',
+			'priority' => 10,
+			'section_type' => DeclarativeSettingsTypes::SECTION_TYPE_ADMIN,
+			'section_id' => 'groupware',
+			'storage_type' => DeclarativeSettingsTypes::STORAGE_TYPE_EXTERNAL,
+			'title' => $this->l->t('System Address Book'),
+			'description' => $this->l->t('The system address book contains contact information for all users in your instance.'),
+
+			'fields' => [
+				[
+					'id' => 'system_addressbook_enabled',
+					'title' => $this->l->t('Enable System Address Book'),
+					'type' => DeclarativeSettingsTypes::CHECKBOX,
+					'default' => false,
+					'options' => [],
+				],
+			],
+		];
+	}
+
+}