update Piwik to version 2.16 (fixes #91)

www/analytics/core/Tracker/Handler/Factory.php

@@ -0,0 +1,42 @@
+<?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\Tracker\Handler;
+
+use Exception;
+use Piwik\Piwik;
+use Piwik\Tracker\Handler;
+
+class Factory
+{
+    public static function make()
+    {
+        $handler = null;
+
+        /**
+         * Triggered before a new **handler tracking object** is created. Subscribers to this
+         * event can force the use of a custom handler tracking object that extends from
+         * {@link Piwik\Tracker\Handler} and customize any tracking behavior.
+         *
+         * @param \Piwik\Tracker\Handler &$handler Initialized to null, but can be set to
+         *                                         a new handler object. If it isn't modified
+         *                                         Piwik uses the default class.
+         * @ignore This event is not public yet as the Handler API is not really stable yet
+         */
+        Piwik::postEvent('Tracker.newHandler', array(&$handler));
+
+        if (is_null($handler)) {
+            $handler = new Handler();
+        } elseif (!($handler instanceof Handler)) {
+            throw new Exception("The Handler object set in the plugin must be an instance of Piwik\\Tracker\\Handler");
+        }
+
+        return $handler;
+    }
+}