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msd2/tracking/piwik/plugins/PrivacyManager/IPAnonymizer.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;
+
+use Piwik\Common;
+use Piwik\Network\IP;
+
+/**
+ * Anonymize visitor IP addresses to comply with the privacy laws/guidelines in countries, such as Germany.
+ */
+class IPAnonymizer
+{
+    /**
+     * Internal function to mask portions of the visitor IP address
+     *
+     * @param IP $ip
+     * @param int $maskLength Number of octets to reset
+     * @return IP
+     */
+    public static function applyIPMask(IP $ip, $maskLength)
+    {
+        $newIpObject = $ip->anonymize($maskLength);
+
+        return $newIpObject;
+    }
+
+    /**
+     * Hook on Tracker.Visit.setVisitorIp to anomymize visitor IP addresses
+     * @param string $ip IP address in binary format (network format)
+     */
+    public function setVisitorIpAddress(&$ip)
+    {
+        $ipObject = IP::fromBinaryIP($ip);
+
+        if (!$this->isActive()) {
+            Common::printDebug("Visitor IP was _not_ anonymized: ". $ipObject->toString());
+            return;
+        }
+
+        $privacyConfig = new Config();
+
+        $newIpObject = self::applyIPMask($ipObject, $privacyConfig->ipAddressMaskLength);
+        $ip = $newIpObject->toBinary();
+
+        Common::printDebug("Visitor IP (was: ". $ipObject->toString() .") has been anonymized: ". $newIpObject->toString());
+    }
+
+    /**
+     * Deactivates IP anonymization. This function will not be called by the Tracker.
+     */
+    public static function deactivate()
+    {
+        $privacyConfig = new Config();
+        $privacyConfig->ipAnonymizerEnabled = false;
+    }
+
+    /**
+     * Activates IP anonymization. This function will not be called by the Tracker.
+     */
+    public static function activate()
+    {
+        $privacyConfig = new Config();
+        $privacyConfig->ipAnonymizerEnabled = true;
+    }
+
+    /**
+     * Returns true if IP anonymization support is enabled, false if otherwise.
+     *
+     * @return bool
+     */
+    public static function isActive()
+    {
+        $privacyConfig = new Config();
+        return $privacyConfig->ipAnonymizerEnabled;
+    }
+}