update Piwik to version 2.16 (fixes #91)

www/analytics/plugins/UserLanguage/Columns/Language.php

@@ -0,0 +1,64 @@
+<?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\UserLanguage\Columns;
+
+use Piwik\Common;
+use Piwik\Piwik;
+use Piwik\Plugin\Dimension\VisitDimension;
+use Piwik\Tracker\Action;
+use Piwik\Tracker\Request;
+use Piwik\Tracker\Visitor;
+
+class Language extends VisitDimension
+{
+    protected $columnName = 'location_browser_lang';
+    protected $columnType = 'VARCHAR(20) NOT NULL';
+
+    public function getName()
+    {
+        return Piwik::translate('General_Language');
+    }
+
+    /**
+     * @param Request $request
+     * @param Visitor $visitor
+     * @param Action|null $action
+     * @return mixed
+     */
+    public function onNewVisit(Request $request, Visitor $visitor, $action)
+    {
+        return $this->getSingleLanguageFromAcceptedLanguages($request->getBrowserLanguage());
+    }
+
+    /**
+     * For better privacy we store only the main language code, instead of the whole browser language string.
+     * 
+     * @param $acceptLanguagesString
+     * @return string
+     */
+    protected function getSingleLanguageFromAcceptedLanguages($acceptLanguagesString)
+    {
+        if (empty($acceptLanguagesString)) {
+            return '';
+        }
+
+        $languageCode = Common::extractLanguageAndRegionCodeFromBrowserLanguage($acceptLanguagesString);
+        return $languageCode;
+    }
+
+    protected function configureSegments()
+    {
+        $segment = new \Piwik\Plugin\Segment();
+        $segment->setCategory('Visit Location');
+        $segment->setSegment('languageCode');
+        $segment->setName('General_Language');
+        $segment->setAcceptedValues('de, fr, en-gb, zh-cn, etc.');
+        $this->addSegment($segment);
+    }
+}