From b044ffb4a23d109d62724e7c62855f4d03d72a32 Mon Sep 17 00:00:00 2001
From: GDIBass <matj1985@gmail.com>
Date: Wed, 16 Aug 2017 23:21:24 +0000
Subject: [PATCH] Added support for guards when advancing workflow from a
 command

---
 .../Workflow/EventListener/GuardListener.php       |  6 ++++++
 .../Tests/EventListener/GuardListenerTest.php      | 14 ++++++++++++++
 2 files changed, 20 insertions(+)

diff --git a/src/Symfony/Component/Workflow/EventListener/GuardListener.php b/src/Symfony/Component/Workflow/EventListener/GuardListener.php
index 20ba04c007..d7d9d2edc4 100644
--- a/src/Symfony/Component/Workflow/EventListener/GuardListener.php
+++ b/src/Symfony/Component/Workflow/EventListener/GuardListener.php
@@ -12,6 +12,7 @@
 namespace Symfony\Component\Workflow\EventListener;
 
 use Symfony\Component\Security\Core\Authentication\AuthenticationTrustResolverInterface;
+use Symfony\Component\Security\Core\Authentication\Token\AnonymousToken;
 use Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorageInterface;
 use Symfony\Component\Security\Core\Authorization\AuthorizationCheckerInterface;
 use Symfony\Component\Security\Core\Role\RoleHierarchyInterface;
@@ -55,6 +56,11 @@ class GuardListener
     {
         $token = $this->tokenStorage->getToken();
 
+        if($token == null) {
+            $token = new AnonymousToken('secret','anon',[]);
+            $this->tokenStorage->setToken($token);
+        }
+
         if (null !== $this->roleHierarchy) {
             $roles = $this->roleHierarchy->getReachableRoles($token->getRoles());
         } else {
diff --git a/src/Symfony/Component/Workflow/Tests/EventListener/GuardListenerTest.php b/src/Symfony/Component/Workflow/Tests/EventListener/GuardListenerTest.php
index b46ee9092c..50481654e5 100644
--- a/src/Symfony/Component/Workflow/Tests/EventListener/GuardListenerTest.php
+++ b/src/Symfony/Component/Workflow/Tests/EventListener/GuardListenerTest.php
@@ -69,6 +69,20 @@ class GuardListenerTest extends TestCase
         $this->assertTrue($event->isBlocked());
     }
 
+    public function testWithNoTokenStorage()
+    {
+        $event = $this->createEvent();
+        $this->tokenStorage = null;
+
+        $this->listener->onTransition($event, 'event_name_a');
+
+        $this->assertFalse($event->isBlocked());
+
+        $this->listener->onTransition($event, 'event_name_b');
+
+        $this->assertTrue($event->isBlocked());
+    }
+
     private function createEvent()
     {
         $subject = new \stdClass();