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    <h3>Editing: FragmentUriGenerator.php</h3>
    <textarea name="content" rows="20" cols="80">&lt;?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier &lt;fabien@symfony.com&gt;
 *
 * 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\RequestStack;
use Symfony\Component\HttpKernel\Controller\ControllerReference;
use Symfony\Component\HttpKernel\UriSigner;

/**
 * Generates a fragment URI.
 *
 * @author Kévin Dunglas &lt;kevin@dunglas.fr&gt;
 * @author Fabien Potencier &lt;fabien@symfony.com&gt;
 */
final class FragmentUriGenerator implements FragmentUriGeneratorInterface
{
    private $fragmentPath;
    private $signer;
    private $requestStack;

    public function __construct(string $fragmentPath, ?UriSigner $signer = null, ?RequestStack $requestStack = null)
    {
        $this-&gt;fragmentPath = $fragmentPath;
        $this-&gt;signer = $signer;
        $this-&gt;requestStack = $requestStack;
    }

    /**
     * {@inheritDoc}
     */
    public function generate(ControllerReference $controller, ?Request $request = null, bool $absolute = false, bool $strict = true, bool $sign = true): string
    {
        if (null === $request &amp;&amp; (null === $this-&gt;requestStack || null === $request = $this-&gt;requestStack-&gt;getCurrentRequest())) {
            throw new \LogicException('Generating a fragment URL can only be done when handling a Request.');
        }

        if ($sign &amp;&amp; null === $this-&gt;signer) {
            throw new \LogicException('You must use a URI when using the ESI rendering strategy or set a URL signer.');
        }

        if ($strict) {
            $this-&gt;checkNonScalar($controller-&gt;attributes);
        }

        // We need to forward the current _format and _locale values as we don't have
        // a proper routing pattern to do the job for us.
        // This makes things inconsistent if you switch from rendering a controller
        // to rendering a route if the route pattern does not contain the special
        // _format and _locale placeholders.
        if (!isset($controller-&gt;attributes['_format'])) {
            $controller-&gt;attributes['_format'] = $request-&gt;getRequestFormat();
        }
        if (!isset($controller-&gt;attributes['_locale'])) {
            $controller-&gt;attributes['_locale'] = $request-&gt;getLocale();
        }

        $controller-&gt;attributes['_controller'] = $controller-&gt;controller;
        $controller-&gt;query['_path'] = http_build_query($controller-&gt;attributes, '', '&amp;');
        $path = $this-&gt;fragmentPath.'?'.http_build_query($controller-&gt;query, '', '&amp;');

        // we need to sign the absolute URI, but want to return the path only.
        $fragmentUri = $sign || $absolute ? $request-&gt;getUriForPath($path) : $request-&gt;getBaseUrl().$path;

        if (!$sign) {
            return $fragmentUri;
        }

        $fragmentUri = $this-&gt;signer-&gt;sign($fragmentUri);

        return $absolute ? $fragmentUri : substr($fragmentUri, \strlen($request-&gt;getSchemeAndHttpHost()));
    }

    private function checkNonScalar(array $values): void
    {
        foreach ($values as $key =&gt; $value) {
            if (\is_array($value)) {
                $this-&gt;checkNonScalar($value);
            } elseif (!\is_scalar($value) &amp;&amp; null !== $value) {
                throw new \LogicException(sprintf('Controller attributes cannot contain non-scalar/non-null values (value for key &quot;%s&quot; is not a scalar or null).', $key));
            }
        }
    }
}
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