update Piwik to version 2.16 (fixes #91)

www/analytics/core/Period/PeriodValidator.php

@@ -0,0 +1,52 @@
+<?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\Period;
+
+use Piwik\Config;
+
+class PeriodValidator
+{
+    /**
+     * @param string $period
+     * @return bool
+     */
+    public function isPeriodAllowedForUI($period)
+    {
+        return in_array($period, $this->getPeriodsAllowedForUI());
+    }
+
+    /**
+     * @param string $period
+     * @return bool
+     */
+    public function isPeriodAllowedForAPI($period)
+    {
+        return in_array($period, $this->getPeriodsAllowedForAPI());
+    }
+
+    /**
+     * @return string[]
+     */
+    public function getPeriodsAllowedForUI()
+    {
+        $periodsAllowed = Config::getInstance()->General['enabled_periods_UI'];
+
+        return array_map('trim', explode(',', $periodsAllowed));
+    }
+
+    /**
+     * @return string[]
+     */
+    public function getPeriodsAllowedForAPI()
+    {
+        $periodsAllowed = Config::getInstance()->General['enabled_periods_API'];
+
+        return array_map('trim', explode(',', $periodsAllowed));
+    }
+}