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msd2/tracking/piwik/plugins/PrivacyManager/Tracker/RequestProcessor.php

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+<?php
+/**
+ * Piwik - free/libre analytics platform
+ *
+ * @link http://piwik.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;
+    }
+}