diff vendor/symfony/http-kernel/Fragment/FragmentHandler.php @ 0:c75dbcec494b

Initial commit from drush-created site

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vendor/symfony/http-kernel/Fragment/FragmentHandler.php	Thu Jul 05 14:24:15 2018 +0000
@@ -0,0 +1,112 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <[e-mail]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\HttpKernel\Fragment;
+
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\HttpFoundation\StreamedResponse;
+use Symfony\Component\HttpFoundation\RequestStack;
+use Symfony\Component\HttpKernel\Controller\ControllerReference;
+
+/**
+ * Renders a URI that represents a resource fragment.
+ *
+ * This class handles the rendering of resource fragments that are included into
+ * a main resource. The handling of the rendering is managed by specialized renderers.
+ *
+ * @author Fabien Potencier <[e-mail]>
+ *
+ * @see FragmentRendererInterface
+ */
+class FragmentHandler
+{
+    private $debug;
+    private $renderers = array();
+    private $requestStack;
+
+    /**
+     * @param RequestStack                $requestStack The Request stack that controls the lifecycle of requests
+     * @param FragmentRendererInterface[] $renderers    An array of FragmentRendererInterface instances
+     * @param bool                        $debug        Whether the debug mode is enabled or not
+     */
+    public function __construct(RequestStack $requestStack, array $renderers = array(), $debug = false)
+    {
+        $this->requestStack = $requestStack;
+        foreach ($renderers as $renderer) {
+            $this->addRenderer($renderer);
+        }
+        $this->debug = $debug;
+    }
+
+    /**
+     * Adds a renderer.
+     */
+    public function addRenderer(FragmentRendererInterface $renderer)
+    {
+        $this->renderers[$renderer->getName()] = $renderer;
+    }
+
+    /**
+     * Renders a URI and returns the Response content.
+     *
+     * Available options:
+     *
+     *  * ignore_errors: true to return an empty string in case of an error
+     *
+     * @param string|ControllerReference $uri      A URI as a string or a ControllerReference instance
+     * @param string                     $renderer The renderer name
+     * @param array                      $options  An array of options
+     *
+     * @return string|null The Response content or null when the Response is streamed
+     *
+     * @throws \InvalidArgumentException when the renderer does not exist
+     * @throws \LogicException           when no master request is being handled
+     */
+    public function render($uri, $renderer = 'inline', array $options = array())
+    {
+        if (!isset($options['ignore_errors'])) {
+            $options['ignore_errors'] = !$this->debug;
+        }
+
+        if (!isset($this->renderers[$renderer])) {
+            throw new \InvalidArgumentException(sprintf('The "%s" renderer does not exist.', $renderer));
+        }
+
+        if (!$request = $this->requestStack->getCurrentRequest()) {
+            throw new \LogicException('Rendering a fragment can only be done when handling a Request.');
+        }
+
+        return $this->deliver($this->renderers[$renderer]->render($uri, $request, $options));
+    }
+
+    /**
+     * Delivers the Response as a string.
+     *
+     * When the Response is a StreamedResponse, the content is streamed immediately
+     * instead of being returned.
+     *
+     * @return string|null The Response content or null when the Response is streamed
+     *
+     * @throws \RuntimeException when the Response is not successful
+     */
+    protected function deliver(Response $response)
+    {
+        if (!$response->isSuccessful()) {
+            throw new \RuntimeException(sprintf('Error when rendering "%s" (Status code is %s).', $this->requestStack->getCurrentRequest()->getUri(), $response->getStatusCode()));
+        }
+
+        if (!$response instanceof StreamedResponse) {
+            return $response->getContent();
+        }
+
+        $response->sendContent();
+    }
+}