added RBAC

lib/User/Helper/TimezoneHelper.php

@@ -0,0 +1,35 @@
+<?php
+namespace Da\User\Helper;
+
+use DateTimeZone;
+use yii\helpers\ArrayHelper;
+use DateTime;
+
+
+class TimezoneHelper
+{
+    /**
+     * Get all of the time zones with the offsets sorted by their offset
+     *
+     * @return array
+     */
+    public static function getAll()
+    {
+        $timeZones = [];
+        $timeZoneIdentifiers = DateTimeZone::listIdentifiers();
+
+        foreach ($timeZoneIdentifiers as $timeZone) {
+            $date = new DateTime('now', new DateTimeZone($timeZone));
+            $offset = $date->getOffset() / 60 / 60;
+            $timeZones[] = [
+                'timezone' => $timeZone,
+                'name' => "{$timeZone} (UTC " . ($offset > 0 ? '+' : '') . "{$offset})",
+                'offset' => $offset
+            ];
+        }
+
+        ArrayHelper::multisort($timeZones, 'offset', SORT_DESC, SORT_NUMERIC);
+
+        return $timeZones;
+    }
+}