1 files changed, 58 insertions, 0 deletions
diff --git a/apps/dav/lib/CardDAV/Plugin.php b/apps/dav/lib/CardDAV/Plugin.php
new file mode 100644
index 00000000000..0ec10306ceb
--- /dev/null
+++ b/apps/dav/lib/CardDAV/Plugin.php
@@ -0,0 +1,58 @@
+<?php
+
+/**
+ * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+namespace OCA\DAV\CardDAV;
+
+use OCA\DAV\CardDAV\Xml\Groups;
+use Sabre\DAV\INode;
+use Sabre\DAV\PropFind;
+use Sabre\DAV\Server;
+
+class Plugin extends \Sabre\CardDAV\Plugin {
+	public function initialize(Server $server) {
+		$server->on('propFind', [$this, 'propFind']);
+		parent::initialize($server);
+	}
+
+	/**
+	 * Returns the addressbook home for a given principal
+	 *
+	 * @param string $principal
+	 * @return string|null
+	 */
+	protected function getAddressbookHomeForPrincipal($principal) {
+		if (strrpos($principal, 'principals/users', -strlen($principal)) !== false) {
+			[, $principalId] = \Sabre\Uri\split($principal);
+			return self::ADDRESSBOOK_ROOT . '/users/' . $principalId;
+		}
+		if (strrpos($principal, 'principals/groups', -strlen($principal)) !== false) {
+			[, $principalId] = \Sabre\Uri\split($principal);
+			return self::ADDRESSBOOK_ROOT . '/groups/' . $principalId;
+		}
+		if (strrpos($principal, 'principals/system', -strlen($principal)) !== false) {
+			[, $principalId] = \Sabre\Uri\split($principal);
+			return self::ADDRESSBOOK_ROOT . '/system/' . $principalId;
+		}
+	}
+
+	/**
+	 * Adds all CardDAV-specific properties
+	 *
+	 * @param PropFind $propFind
+	 * @param INode $node
+	 * @return void
+	 */
+	public function propFind(PropFind $propFind, INode $node) {
+		$ns = '{http://owncloud.org/ns}';
+
+		if ($node instanceof AddressBook) {
+			$propFind->handle($ns . 'groups', function () use ($node) {
+				return new Groups($node->getContactsGroups());
+			});
+		}
+	}
+}