1 files changed, 132 insertions, 0 deletions
diff --git a/apps/dav/lib/Service/ExampleContactService.php b/apps/dav/lib/Service/ExampleContactService.php
new file mode 100644
index 00000000000..6ed6c66cbb3
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+++ b/apps/dav/lib/Service/ExampleContactService.php
@@ -0,0 +1,132 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+namespace OCA\DAV\Service;
+
+use OCA\DAV\AppInfo\Application;
+use OCA\DAV\CardDAV\CardDavBackend;
+use OCP\AppFramework\Services\IAppConfig;
+use OCP\Files\AppData\IAppDataFactory;
+use OCP\Files\IAppData;
+use OCP\Files\NotFoundException;
+use Psr\Log\LoggerInterface;
+use Symfony\Component\Uid\Uuid;
+
+class ExampleContactService {
+	private readonly IAppData $appData;
+
+	public function __construct(
+		IAppDataFactory $appDataFactory,
+		private readonly IAppConfig $appConfig,
+		private readonly LoggerInterface $logger,
+		private readonly CardDavBackend $cardDav,
+	) {
+		$this->appData = $appDataFactory->get(Application::APP_ID);
+	}
+
+	public function isDefaultContactEnabled(): bool {
+		return $this->appConfig->getAppValueBool('enableDefaultContact', true);
+	}
+
+	public function setDefaultContactEnabled(bool $value): void {
+		$this->appConfig->setAppValueBool('enableDefaultContact', $value);
+	}
+
+	public function getCard(): ?string {
+		try {
+			$folder = $this->appData->getFolder('defaultContact');
+		} catch (NotFoundException $e) {
+			return null;
+		}
+
+		if (!$folder->fileExists('defaultContact.vcf')) {
+			return null;
+		}
+
+		return $folder->getFile('defaultContact.vcf')->getContent();
+	}
+
+	public function setCard(?string $cardData = null) {
+		try {
+			$folder = $this->appData->getFolder('defaultContact');
+		} catch (NotFoundException $e) {
+			$folder = $this->appData->newFolder('defaultContact');
+		}
+
+		$isCustom = true;
+		if (is_null($cardData)) {
+			$cardData = file_get_contents(__DIR__ . '/../ExampleContentFiles/exampleContact.vcf');
+			$isCustom = false;
+		}
+
+		if (!$cardData) {
+			throw new \Exception('Could not read exampleContact.vcf');
+		}
+
+		$file = (!$folder->fileExists('defaultContact.vcf')) ? $folder->newFile('defaultContact.vcf') : $folder->getFile('defaultContact.vcf');
+		$file->putContent($cardData);
+
+		$this->appConfig->setAppValueBool('hasCustomDefaultContact', $isCustom);
+	}
+
+	public function defaultContactExists(): bool {
+		try {
+			$folder = $this->appData->getFolder('defaultContact');
+		} catch (NotFoundException $e) {
+			return false;
+		}
+		return $folder->fileExists('defaultContact.vcf');
+	}
+
+	public function createDefaultContact(int $addressBookId): void {
+		if (!$this->isDefaultContactEnabled()) {
+			return;
+		}
+
+		try {
+			$folder = $this->appData->getFolder('defaultContact');
+			$defaultContactFile = $folder->getFile('defaultContact.vcf');
+			$data = $defaultContactFile->getContent();
+		} catch (\Exception $e) {
+			$this->logger->error('Couldn\'t get default contact file', ['exception' => $e]);
+			return;
+		}
+
+		// Make sure the UID is unique
+		$newUid = Uuid::v4()->toRfc4122();
+		$newRev = date('Ymd\THis\Z');
+		$vcard = \Sabre\VObject\Reader::read($data, \Sabre\VObject\Reader::OPTION_FORGIVING);
+		if ($vcard->UID) {
+			$vcard->UID->setValue($newUid);
+		} else {
+			$vcard->add('UID', $newUid);
+		}
+		if ($vcard->REV) {
+			$vcard->REV->setValue($newRev);
+		} else {
+			$vcard->add('REV', $newRev);
+		}
+
+		// Level 3 means that the document is invalid
+		// https://sabre.io/vobject/vcard/#validating-vcard
+		$level3Warnings = array_filter($vcard->validate(), static function ($warning) {
+			return $warning['level'] === 3;
+		});
+
+		if (!empty($level3Warnings)) {
+			$this->logger->error('Default contact is invalid', ['warnings' => $level3Warnings]);
+			return;
+		}
+		try {
+			$this->cardDav->createCard($addressBookId, 'default', $vcard->serialize(), false);
+		} catch (\Exception $e) {
+			$this->logger->error($e->getMessage(), ['exception' => $e]);
+		}
+	}
+}