76 lines
2.2 KiB
PHP
76 lines
2.2 KiB
PHP
<?php
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declare(strict_types=1);
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/**
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* @copyright Copyright (c) 2021, Lukas Reschke <lukas@statuscode.ch>
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*
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* @author Lukas Reschke <lukas@statuscode.ch>
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*
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* @license GNU AGPL version 3 or any later version
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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namespace OC\User;
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use OCP\IDBConnection;
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class UsernameDuplicationPreventionManager {
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/** @var IDBConnection */
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private $dbConnection;
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private const TABLE_NAME = 'previously_used_userids';
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private const HASHED_USER_ID_NAME = 'user_id_hash';
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public function __construct(IDBConnection $connection) {
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$this->dbConnection = $connection;
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}
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private function calculateUserNameHash(string $username) : string {
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return hash('sha512', $username);
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}
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public function markUsed(string $userName) : void {
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$queryBuilder = $this->dbConnection->getQueryBuilder();
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$queryBuilder->insert(self::TABLE_NAME)
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->values([
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self::HASHED_USER_ID_NAME => $queryBuilder->createNamedParameter($this->calculateUserNameHash($userName)),
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])
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->executeStatement();
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}
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public function wasUsed(string $userName) : bool {
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$queryBuilder = $this->dbConnection->getQueryBuilder();
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$result = $queryBuilder->select($queryBuilder->func()->count())
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->from(self::TABLE_NAME)
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->where(
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$queryBuilder->expr()->eq(
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self::HASHED_USER_ID_NAME,
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$queryBuilder->expr()->literal($this->calculateUserNameHash($userName))
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)
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)
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->executeQuery();
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return (int)$result->fetchOne() !== 0;
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}
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public function cleanUp(): void {
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$qb = $this->dbConnection->getQueryBuilder();
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$qb
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->delete(self::TABLE_NAME)
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->executeStatement();
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}
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}
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