fix(dav): Create SAB at installation

apps/dav/appinfo/info.xml

@@ -49,6 +49,9 @@
 		<live-migration>
 			<step>OCA\DAV\Migration\ChunkCleanup</step>
 		</live-migration>
+		<install>
+			<step>OCA\DAV\Migration\CreateSystemAddressBookStep</step>
+		</install>
 	</repair-steps>
 
 	<commands>

apps/dav/composer/composer/autoload_classmap.php

@@ -306,6 +306,7 @@
     'OCA\\DAV\\Migration\\BuildSocialSearchIndexBackgroundJob' => $baseDir . '/../lib/Migration/BuildSocialSearchIndexBackgroundJob.php',
     'OCA\\DAV\\Migration\\CalDAVRemoveEmptyValue' => $baseDir . '/../lib/Migration/CalDAVRemoveEmptyValue.php',
     'OCA\\DAV\\Migration\\ChunkCleanup' => $baseDir . '/../lib/Migration/ChunkCleanup.php',
+    'OCA\\DAV\\Migration\\CreateSystemAddressBookStep' => $baseDir . '/../lib/Migration/CreateSystemAddressBookStep.php',
     'OCA\\DAV\\Migration\\DeleteSchedulingObjects' => $baseDir . '/../lib/Migration/DeleteSchedulingObjects.php',
     'OCA\\DAV\\Migration\\FixBirthdayCalendarComponent' => $baseDir . '/../lib/Migration/FixBirthdayCalendarComponent.php',
     'OCA\\DAV\\Migration\\RefreshWebcalJobRegistrar' => $baseDir . '/../lib/Migration/RefreshWebcalJobRegistrar.php',

apps/dav/composer/composer/autoload_static.php

@@ -321,6 +321,7 @@ class ComposerStaticInitDAV
         'OCA\\DAV\\Migration\\BuildSocialSearchIndexBackgroundJob' => __DIR__ . '/..' . '/../lib/Migration/BuildSocialSearchIndexBackgroundJob.php',
         'OCA\\DAV\\Migration\\CalDAVRemoveEmptyValue' => __DIR__ . '/..' . '/../lib/Migration/CalDAVRemoveEmptyValue.php',
         'OCA\\DAV\\Migration\\ChunkCleanup' => __DIR__ . '/..' . '/../lib/Migration/ChunkCleanup.php',
+        'OCA\\DAV\\Migration\\CreateSystemAddressBookStep' => __DIR__ . '/..' . '/../lib/Migration/CreateSystemAddressBookStep.php',
         'OCA\\DAV\\Migration\\DeleteSchedulingObjects' => __DIR__ . '/..' . '/../lib/Migration/DeleteSchedulingObjects.php',
         'OCA\\DAV\\Migration\\FixBirthdayCalendarComponent' => __DIR__ . '/..' . '/../lib/Migration/FixBirthdayCalendarComponent.php',
         'OCA\\DAV\\Migration\\RefreshWebcalJobRegistrar' => __DIR__ . '/..' . '/../lib/Migration/RefreshWebcalJobRegistrar.php',

apps/dav/lib/CardDAV/SyncService.php

@@ -119,6 +119,12 @@ public function ensureSystemAddressBookExists(string $principal, string $uri, ar
 		}
 	}
 
+	public function ensureLocalSystemAddressBookExists(): ?array {
+		return $this->ensureSystemAddressBookExists('principals/system/system', 'system', [
+			'{' . Plugin::NS_CARDDAV . '}addressbook-description' => 'System addressbook which holds all users of this instance'
+		]);
+	}
+
 	private function prepareUri(string $host, string $path): string {
 		/*
 		 * The trailing slash is important for merging the uris together.
@@ -275,10 +281,7 @@ public function deleteUser($userOrCardId) {
 	 */
 	public function getLocalSystemAddressBook() {
 		if (is_null($this->localSystemAddressBook)) {
-			$systemPrincipal = 'principals/system/system';
-			$this->localSystemAddressBook = $this->ensureSystemAddressBookExists($systemPrincipal, 'system', [
-				'{' . Plugin::NS_CARDDAV . '}addressbook-description' => 'System addressbook which holds all users of this instance'
-			]);
+			$this->localSystemAddressBook = $this->ensureLocalSystemAddressBookExists();
 		}
 
 		return $this->localSystemAddressBook;

apps/dav/lib/Migration/CreateSystemAddressBookStep.php

@@ -0,0 +1,30 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+namespace OCA\DAV\Migration;
+
+use OCA\DAV\CardDAV\SyncService;
+use OCP\Migration\IOutput;
+use OCP\Migration\IRepairStep;
+
+class CreateSystemAddressBookStep implements IRepairStep {
+
+	public function __construct(
+		private SyncService $syncService,
+	) {
+	}
+
+	public function getName(): string {
+		return 'Create system address book';
+	}
+
+	public function run(IOutput $output): void {
+		$this->syncService->ensureLocalSystemAddressBookExists();
+	}
+}

apps/dav/tests/unit/Migration/CreateSystemAddressBookStepTest.php

@@ -0,0 +1,47 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+namespace OCA\DAV\Tests\Unit\Migration;
+
+use OCA\DAV\CardDAV\SyncService;
+use OCA\DAV\Migration\CreateSystemAddressBookStep;
+use OCP\Migration\IOutput;
+use PHPUnit\Framework\MockObject\MockObject;
+use PHPUnit\Framework\TestCase;
+
+class CreateSystemAddressBookStepTest extends TestCase {
+
+	private SyncService|MockObject $syncService;
+	private CreateSystemAddressBookStep $step;
+
+	protected function setUp(): void {
+		parent::setUp();
+
+		$this->syncService = $this->createMock(SyncService::class);
+
+		$this->step = new CreateSystemAddressBookStep(
+			$this->syncService,
+		);
+	}
+
+	public function testGetName(): void {
+		$name = $this->step->getName();
+
+		self::assertEquals('Create system address book', $name);
+	}
+
+	public function testRun(): void {
+		$output = $this->createMock(IOutput::class);
+
+		$this->step->run($output);
+
+		$this->addToAssertionCount(1);
+	}
+
+}