Actualización

vendor/symfony/framework-bundle/Templating/Helper/RequestHelper.php

@@ -0,0 +1,72 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Bundle\FrameworkBundle\Templating\Helper;
+
+use Symfony\Component\Templating\Helper\Helper;
+use Symfony\Component\HttpFoundation\RequestStack;
+
+/**
+ * RequestHelper provides access to the current request parameters.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class RequestHelper extends Helper
+{
+    protected $requestStack;
+
+    public function __construct(RequestStack $requestStack)
+    {
+        $this->requestStack = $requestStack;
+    }
+
+    /**
+     * Returns a parameter from the current request object.
+     *
+     * @param string $key     The name of the parameter
+     * @param string $default A default value
+     *
+     * @return mixed
+     *
+     * @see Request::get()
+     */
+    public function getParameter($key, $default = null)
+    {
+        return $this->getRequest()->get($key, $default);
+    }
+
+    /**
+     * Returns the locale.
+     *
+     * @return string
+     */
+    public function getLocale()
+    {
+        return $this->getRequest()->getLocale();
+    }
+
+    private function getRequest()
+    {
+        if (!$this->requestStack->getCurrentRequest()) {
+            throw new \LogicException('A Request must be available.');
+        }
+
+        return $this->requestStack->getCurrentRequest();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getName()
+    {
+        return 'request';
+    }
+}