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<?php
declare(strict_types=1);
/**
* @copyright Copyright (c) 2021 Lukas Reschke <lukas@statuscode.ch>
*
* @author Lukas Reschke <lukas@statuscode.ch>
*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* 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
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
function canPerformLimitedAction($ratelimitName, $maxRequestsPerHour) : bool {
require_once realpath(dirname(__FILE__)) . '/../config.php';
if(!defined("REDIS")) {
return true;
}
$userIp = $_SERVER['REMOTE_ADDR'];
$redis = new Predis\Client(REDIS);
$rateId = "requests_count_ratelimiter_{$ratelimitName}_{$userIp}";
$rateLimit = (int) $redis->get($rateId);
$globalRateId = "requests_count_ratelimiter_{$userIp}";
$globalRateLimit = (int) $redis->get($globalRateId);
$redis->set($globalRateId, $globalRateLimit + 1);
$redis->expire($globalRateId, 3600);
$globalRateLimitMaximumPerHour = 20;
if ($globalRateLimit + 1 > $globalRateLimitMaximumPerHour) {
return false;
}
$redis->set($rateId, $rateLimit + 1);
$redis->expire($rateId, 3600);
if ($rateLimit + 1 > $maxRequestsPerHour) {
return false;
} else {
return true;
}
}
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