add role checking to controllers

console/migrations/m151105_114421_add__role__employee.php

@@ -0,0 +1,31 @@
+<?php
+
+use yii\db\Schema;
+use yii\db\Migration;
+
+class m151105_114421_add__role__employee extends Migration
+{
+    public function up()
+    {
+    	$role = Yii::$app->authManager->createRole('employee');
+    	Yii::$app->authManager->add($role);
+    }
+
+    public function down()
+    {
+        echo "m151105_114421_add__role__employee cannot be reverted.\n";
+
+        return false;
+    }
+
+    /*
+    // Use safeUp/safeDown to run migration code within a transaction
+    public function safeUp()
+    {
+    }
+
+    public function safeDown()
+    {
+    }
+    */
+}