server/apps/dav/lib/carddav/addressbookroot.php

<?php
/**
 * @author Thomas Müller <thomas.mueller@tmit.eu>
 *
 * @copyright Copyright (c) 2016, ownCloud, Inc.
 * @license AGPL-3.0
 *
 * This code is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License, version 3,
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License, version 3,
 * along with this program.  If not, see <http://www.gnu.org/licenses/>
 *
 */
namespace OCA\DAV\CardDAV;

class AddressBookRoot extends \Sabre\CardDAV\AddressBookRoot {

	/**
	 * This method returns a node for a principal.
	 *
	 * The passed array contains principal information, and is guaranteed to
	 * at least contain a uri item. Other properties may or may not be
	 * supplied by the authentication backend.
	 *
	 * @param array $principal
	 * @return \Sabre\DAV\INode
	 */
	function getChildForPrincipal(array $principal) {

		return new UserAddressBooks($this->carddavBackend, $principal['uri']);

	}

	function getName() {

		if ($this->principalPrefix === 'principals') {
			return parent::getName();
		}
		// Grabbing all the components of the principal path.
		$parts = explode('/', $this->principalPrefix);

		// We are only interested in the second part.
		return $parts[1];

	}

}