update Piwik to version 2.16 (fixes #91)

www/analytics/plugins/Diagnostics/Diagnostic/TrackerCheck.php

@@ -0,0 +1,49 @@
+<?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\Diagnostics\Diagnostic;
+
+use Piwik\Common;
+use Piwik\Translation\Translator;
+
+/**
+ * Check that the tracker is working correctly.
+ */
+class TrackerCheck implements Diagnostic
+{
+    /**
+     * @var Translator
+     */
+    private $translator;
+
+    public function __construct(Translator $translator)
+    {
+        $this->translator = $translator;
+    }
+
+    public function execute()
+    {
+        $label = $this->translator->translate('Installation_SystemCheckTracker');
+
+        $trackerStatus = Common::getRequestVar('trackerStatus', 0, 'int');
+
+        if ($trackerStatus == 0) {
+            $status = DiagnosticResult::STATUS_OK;
+            $comment = '';
+        } else {
+            $status = DiagnosticResult::STATUS_WARNING;
+            $comment = sprintf(
+                '%s<br />%s<br />%s',
+                $trackerStatus,
+                $this->translator->translate('Installation_SystemCheckTrackerHelp'),
+                $this->translator->translate('Installation_RestartWebServer')
+            );
+        }
+
+        return array(DiagnosticResult::singleResult($label, $status, $comment));
+    }
+}