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<?php
/**
* Matomo - free/libre analytics platform
*
* @link https://matomo.org
* @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
*
*/
namespace Piwik\Plugins\PrivacyManager\Tracker;
use Piwik\Common;
use Piwik\Plugins\PrivacyManager\PrivacyManager;
use Piwik\SettingsPiwik;
use Piwik\Tracker\Request;
use Piwik\Tracker;
use Piwik\Plugins\PrivacyManager\Config as PrivacyManagerConfig;
class RequestProcessor extends Tracker\RequestProcessor
{
public function manipulateRequest(Request $request)
{
$privacyConfig = new PrivacyManagerConfig();
if ($privacyConfig->anonymizeUserId) {
$userId = $request->getParam('uid');
if ($this->isValueSet($userId)) {
$userIdAnonymized = self::anonymizeUserId($userId);
$request->setParam('uid', $userIdAnonymized);
}
}
if ($privacyConfig->anonymizeOrderId) {
$orderId = $request->getParam('ec_id');
if ($this->isValueSet($orderId)) {
$orderIdAnonymized = sha1(Common::getRandomInt() . $orderId . time() . SettingsPiwik::getSalt());
$request->setParam('ec_id', $orderIdAnonymized);
}
}
}
/**
* pseudo anonymization as we need to make sure to always generate the same UserId for the same original UserID
*
* @param $userId
* @return string
*/
public static function anonymizeUserId($userId)
{
$trackerCache = Tracker\Cache::getCacheGeneral();
$salt = '';
if (!empty($trackerCache[PrivacyManager::OPTION_USERID_SALT])) {
$salt = $trackerCache[PrivacyManager::OPTION_USERID_SALT];
}
if(empty($salt)) {
return $userId;
}
return sha1($userId . $salt);
}
private function isValueSet($value)
{
return $value !== '' && $value !== false && $value !== null;
}
}
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