add piwik installation

www/analytics/plugins/VisitTime/functions.php

@@ -0,0 +1,40 @@
+<?php
+/**
+ * Piwik - Open source web analytics
+ *
+ * @link http://piwik.org
+ * @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
+ *
+ */
+
+namespace Piwik\Plugins\VisitTime;
+
+use Piwik\Piwik;
+
+function getTimeLabel($label)
+{
+    return sprintf(Piwik::translate('VisitTime_NHour'), $label);
+}
+
+/**
+ * Returns the day of the week for a date string, without creating a new
+ * Date instance.
+ *
+ * @param string $dateStr
+ * @return int The day of the week (1-7)
+ */
+function dayOfWeekFromDate($dateStr)
+{
+    return date('N', strtotime($dateStr));
+}
+
+/**
+ * Returns translated long name of a day of the week.
+ *
+ * @param int $dayOfWeek 1-7, for Sunday-Saturday
+ * @return string
+ */
+function translateDayOfWeek($dayOfWeek)
+{
+    return Piwik::translate('General_LongDay_' . $dayOfWeek);
+}