nextcloud-server/apps/encryption/lib/exceptions/publickeymissingexception.php

<?php
/**
 * @author Thomas Müller <thomas.mueller@tmit.eu>
 *
 * @copyright Copyright (c) 2015, 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\Encryption\Exceptions;

use OCP\Encryption\Exceptions\GenericEncryptionException;

class PublicKeyMissingException extends GenericEncryptionException {

	/**
	 * @param string $userId
	 */
	public function __construct($userId) {
		if(empty($userId)) {
			$userId = "<no-user-id-given>";
		}
		parent::__construct("Public Key missing for user: $userId");
	}

}