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- <?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\TwigBundle;
-
- use Symfony\Bundle\FrameworkBundle\Templating\EngineInterface;
- use Symfony\Component\Templating\TemplateNameParserInterface;
- use Symfony\Component\HttpFoundation\Response;
-
- /**
- * This engine renders Twig templates.
- *
- * @author Fabien Potencier <fabien@symfony.com>
- */
- class TwigEngine implements EngineInterface
- {
- protected $environment;
- protected $parser;
-
- /**
- * Constructor.
- *
- * @param \Twig_Environment $environment A \Twig_Environment instance
- * @param TemplateNameParserInterface $parser A TemplateNameParserInterface instance
- */
- public function __construct(\Twig_Environment $environment, TemplateNameParserInterface $parser)
- {
- $this->environment = $environment;
- $this->parser = $parser;
- }
-
- /**
- * Renders a template.
- *
- * @param mixed $name A template name
- * @param array $parameters An array of parameters to pass to the template
- *
- * @return string The evaluated template as a string
- *
- * @throws \InvalidArgumentException if the template does not exist
- * @throws \RuntimeException if the template cannot be rendered
- */
- public function render($name, array $parameters = array())
- {
- return $this->load($name)->render($parameters);
- }
-
- /**
- * Returns true if the template exists.
- *
- * @param mixed $name A template name
- *
- * @return Boolean true if the template exists, false otherwise
- */
- public function exists($name)
- {
- try {
- $this->load($name);
- } catch (\InvalidArgumentException $e) {
- return false;
- }
-
- return true;
- }
-
- /**
- * Returns true if this class is able to render the given template.
- *
- * @param string $name A template name
- *
- * @return Boolean True if this class supports the given resource, false otherwise
- */
- public function supports($name)
- {
- if ($name instanceof \Twig_Template) {
- return true;
- }
-
- $template = $this->parser->parse($name);
-
- return 'twig' === $template->get('engine');
- }
-
- /**
- * Renders a view and returns a Response.
- *
- * @param string $view The view name
- * @param array $parameters An array of parameters to pass to the view
- * @param Response $response A Response instance
- *
- * @return Response A Response instance
- */
- public function renderResponse($view, array $parameters = array(), Response $response = null)
- {
- if (null === $response) {
- $response = new Response();
- }
-
- $response->setContent($this->render($view, $parameters));
-
- return $response;
- }
-
- /**
- * Loads the given template.
- *
- * @param mixed $name A template name or an instance of Twig_Template
- *
- * @return \Twig_TemplateInterface A \Twig_TemplateInterface instance
- *
- * @throws \InvalidArgumentException if the template does not exist
- */
- protected function load($name)
- {
- if ($name instanceof \Twig_Template) {
- return $name;
- }
-
- try {
- return $this->environment->loadTemplate($name);
- } catch (\Twig_Error_Loader $e) {
- throw new \InvalidArgumentException($e->getMessage(), $e->getCode(), $e);
- }
- }
- }
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