fix: Register the dav plugin through an event listener

appinfo/info.xml

@@ -26,7 +26,6 @@ While theoretically any other authentication provider implementing either one of
 	<namespace>User_SAML</namespace>
 	<types>
 		<authentication/>
-		<dav/>
 	</types>
 	<documentation>
 		<admin>https://portal.nextcloud.com/article/configuring-single-sign-on-10.html</admin>
@@ -61,9 +60,4 @@ While theoretically any other authentication provider implementing either one of
 		<admin>OCA\User_SAML\Settings\Admin</admin>
 		<admin-section>OCA\User_SAML\Settings\Section</admin-section>
 	</settings>
-	<sabre>
-		<plugins>
-			<plugin>OCA\User_SAML\DavPlugin</plugin>
-		</plugins>
-	</sabre>
 </info>

lib/AppInfo/Application.php

@@ -12,10 +12,12 @@
 use OC\Security\CSRF\CsrfTokenManager;
 use OC\User\LoginException;
 use OC_User;
+use OCA\DAV\Events\SabrePluginAddEvent;
 use OCA\User_SAML\DavPlugin;
 use OCA\User_SAML\GroupBackend;
 use OCA\User_SAML\GroupManager;
 use OCA\User_SAML\Listener\LoadAdditionalScriptsListener;
+use OCA\User_SAML\Listener\SabrePluginEventListener;
 use OCA\User_SAML\Middleware\OnlyLoggedInMiddleware;
 use OCA\User_SAML\SAMLSettings;
 use OCA\User_SAML\UserBackend;
@@ -50,6 +52,7 @@ public function __construct(array $urlParams = []) {
 	public function register(IRegistrationContext $context): void {
 		$context->registerMiddleware(OnlyLoggedInMiddleware::class);
 		$context->registerEventListener(BeforeTemplateRenderedEvent::class, LoadAdditionalScriptsListener::class);
+		$context->registerEventListener(SabrePluginAddEvent::class, SabrePluginEventListener::class);
 		$context->registerService(DavPlugin::class, function (ContainerInterface $c) {
 			return new DavPlugin(
 				$c->get(ISession::class),

lib/Listener/SabrePluginEventListener.php

@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+namespace OCA\User_SAML\Listener;
+
+use OCA\DAV\Events\SabrePluginAddEvent;
+use OCA\User_SAML\DavPlugin;
+use OCP\EventDispatcher\Event;
+use OCP\EventDispatcher\IEventListener;
+use OCP\Server;
+
+/** @template-implements IEventListener<SabrePluginAddEvent|Event> */
+class SabrePluginEventListener implements IEventListener {
+	public function handle(Event $event): void {
+		if (!$event instanceof SabrePluginAddEvent) {
+			return;
+		}
+		$event->getServer()->addPlugin(Server::get(DavPlugin::class));
+	}
+}

tests/psalm-baseline.xml

@@ -4,12 +4,6 @@
  - SPDX-License-Identifier: AGPL-3.0-or-later
 -->
 <files psalm-version="5.26.1@d747f6500b38ac4f7dfc5edbcae6e4b637d7add0">
-  <file src="lib/AppInfo/Application.php">
-    <MissingDependency>
-      <code><![CDATA[DavPlugin]]></code>
-      <code><![CDATA[DavPlugin]]></code>
-    </MissingDependency>
-  </file>
   <file src="lib/Controller/SAMLController.php">
     <RedundantCondition>
       <code><![CDATA[!$userExists]]></code>
@@ -29,11 +23,6 @@
       <code><![CDATA[ClientFlowLoginV2Controller]]></code>
     </UndefinedClass>
   </file>
-  <file src="lib/DavPlugin.php">
-    <UndefinedClass>
-      <code><![CDATA[ServerPlugin]]></code>
-    </UndefinedClass>
-  </file>
   <file src="lib/Db/ConfigurationsMapper.php">
     <MissingTemplateParam>
       <code><![CDATA[ConfigurationsMapper]]></code>

tests/stub.phpstub

@@ -69,6 +69,20 @@ namespace OC\User {
 	}
 }
 
+namespace OCA\DAV\Connector\Sabre {
+	class Auth {
+		public const DAV_AUTHENTICATED = 'AUTHENTICATED_TO_DAV_BACKEND';
+	}
+}
+
+namespace OCA\DAV\Events {
+	use OCP\EventDispatcher\Event;
+	use Sabre\DAV\Server;
+	class SabrePluginAddEvent extends Event {
+		public function getServer(): Server;
+	}
+}
+
 class OC_User {
 	public static function useBackend($userBackend): void;
 	public static function handleApacheAuth(): void;

vendor-bin/psalm/composer.json

@@ -1,7 +1,8 @@
 {
     "require-dev": {
         "nextcloud/ocp": "dev-stable28",
-        "vimeo/psalm": "^5.26"
+        "vimeo/psalm": "^5.26",
+        "sabre/dav": "4.7.0"
     },
     "config": {
         "platform": {