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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\Component\HttpKernel\Fragment;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpKernel\Controller\ControllerReference;
use Symfony\Component\HttpKernel\UriSigner;
use Symfony\Component\Templating\EngineInterface;
use Twig\Environment;
use Twig\Error\LoaderError;
use Twig\Loader\ExistsLoaderInterface;
/**
* Implements the Hinclude rendering strategy.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
class HIncludeFragmentRenderer extends RoutableFragmentRenderer
{
private $globalDefaultTemplate;
private $signer;
private $templating;
private $charset;
/**
* @param EngineInterface|Environment $templating An EngineInterface or a Twig instance
* @param UriSigner $signer A UriSigner instance
* @param string $globalDefaultTemplate The global default content (it can be a template name or the content)
* @param string $charset
*/
public function __construct($templating = null, UriSigner $signer = null, string $globalDefaultTemplate = null, string $charset = 'utf-8')
{
$this->setTemplating($templating);
$this->globalDefaultTemplate = $globalDefaultTemplate;
$this->signer = $signer;
$this->charset = $charset;
}
/**
* Sets the templating engine to use to render the default content.
*
* @param EngineInterface|Environment|null $templating An EngineInterface or an Environment instance
*
* @throws \InvalidArgumentException
*/
public function setTemplating($templating)
{
if (null !== $templating && !$templating instanceof EngineInterface && !$templating instanceof Environment) {
throw new \InvalidArgumentException('The hinclude rendering strategy needs an instance of Twig\Environment or Symfony\Component\Templating\EngineInterface');
}
$this->templating = $templating;
}
/**
* Checks if a templating engine has been set.
*
* @return bool true if the templating engine has been set, false otherwise
*/
public function hasTemplating()
{
return null !== $this->templating;
}
/**
* {@inheritdoc}
*
* Additional available options:
*
* * default: The default content (it can be a template name or the content)
* * id: An optional hx:include tag id attribute
* * attributes: An optional array of hx:include tag attributes
*/
public function render($uri, Request $request, array $options = array())
{
if ($uri instanceof ControllerReference) {
if (null === $this->signer) {
throw new \LogicException('You must use a proper URI when using the Hinclude rendering strategy or set a URL signer.');
}
// we need to sign the absolute URI, but want to return the path only.
$uri = substr($this->signer->sign($this->generateFragmentUri($uri, $request, true)), \strlen($request->getSchemeAndHttpHost()));
}
// We need to replace ampersands in the URI with the encoded form in order to return valid html/xml content.
$uri = str_replace('&', '&', $uri);
$template = isset($options['default']) ? $options['default'] : $this->globalDefaultTemplate;
if (null !== $this->templating && $template && $this->templateExists($template)) {
$content = $this->templating->render($template);
} else {
$content = $template;
}
$attributes = isset($options['attributes']) && \is_array($options['attributes']) ? $options['attributes'] : array();
if (isset($options['id']) && $options['id']) {
$attributes['id'] = $options['id'];
}
$renderedAttributes = '';
if (\count($attributes) > 0) {
$flags = ENT_QUOTES | ENT_SUBSTITUTE;
foreach ($attributes as $attribute => $value) {
$renderedAttributes .= sprintf(
' %s="%s"',
htmlspecialchars($attribute, $flags, $this->charset, false),
htmlspecialchars($value, $flags, $this->charset, false)
);
}
}
return new Response(sprintf('<hx:include src="%s"%s>%s</hx:include>', $uri, $renderedAttributes, $content));
}
private function templateExists(string $template): bool
{
if ($this->templating instanceof EngineInterface) {
try {
return $this->templating->exists($template);
} catch (\Exception $e) {
return false;
}
}
$loader = $this->templating->getLoader();
if ($loader instanceof ExistsLoaderInterface || method_exists($loader, 'exists')) {
return $loader->exists($template);
}
try {
if (method_exists($loader, 'getSourceContext')) {
$loader->getSourceContext($template);
} else {
$loader->getSource($template);
}
return true;
} catch (LoaderError $e) {
}
return false;
}
/**
* {@inheritdoc}
*/
public function getName()
{
return 'hinclude';
}
}