1 files changed, 48 insertions, 0 deletions
diff --git a/src/Renderer/Twig/Extensions/Csrf.php b/src/Renderer/Twig/Extensions/Csrf.php
new file mode 100644
index 00000000..9f77df80
--- /dev/null
+++ b/src/Renderer/Twig/Extensions/Csrf.php
@@ -0,0 +1,48 @@
+<?php
+
+namespace Engelsystem\Renderer\Twig\Extensions;
+
+use Symfony\Component\HttpFoundation\Session\SessionInterface;
+use Twig_Extension as TwigExtension;
+use Twig_Function as TwigFunction;
+
+class Csrf extends TwigExtension
+{
+    /** @var SessionInterface */
+    protected $session;
+
+    /**
+     * @param SessionInterface $session
+     */
+    public function __construct(SessionInterface $session)
+    {
+        $this->session = $session;
+    }
+
+    /**
+     * @return TwigFunction[]
+     */
+    public function getFunctions()
+    {
+        return [
+            new TwigFunction('csrf', [$this, 'getCsrfField'], ['is_safe' => ['html']]),
+            new TwigFunction('csrf_token', [$this, 'getCsrfToken']),
+        ];
+    }
+
+    /**
+     * @return string
+     */
+    public function getCsrfField()
+    {
+        return sprintf('<input type="hidden" name="_token" value="%s">', $this->getCsrfToken());
+    }
+
+    /**
+     * @return string
+     */
+    public function getCsrfToken()
+    {
+        return $this->session->get('_token');
+    }
+}