class FragmentUriGenerator

final class FragmentUriGenerator implements FragmentUriGeneratorInterface {
    public function __construct(string $fragmentPath, ?UriSigner $signer = null, ?RequestStack $requestStack = null) {
    }
    public function generate(ControllerReference $controller, ?Request $request = null, bool $absolute = false, bool $strict = true, bool $sign = true) : string {
        if (null === $request && (null === $this->requestStack || null === ($request = $this->requestStack
            ->getCurrentRequest()))) {
            throw new \LogicException('Generating a fragment URL can only be done when handling a Request.');
        }
        if ($sign && null === $this->signer) {
            throw new \LogicException('You must use a URI when using the ESI rendering strategy or set a URL signer.');
        }
        if ($strict) {
            $this->checkNonScalar($controller->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->attributes['_format'])) {
            $controller->attributes['_format'] = $request->getRequestFormat();
        }
        if (!isset($controller->attributes['_locale'])) {
            $controller->attributes['_locale'] = $request->getLocale();
        }
        $controller->attributes['_controller'] = $controller->controller;
        $controller->query['_path'] = http_build_query($controller->attributes, '', '&');
        $path = $this->fragmentPath . '?' . http_build_query($controller->query, '', '&');
        // we need to sign the absolute URI, but want to return the path only.
        $fragmentUri = $sign || $absolute ? $request->getUriForPath($path) : $request->getBaseUrl() . $path;
        if (!$sign) {
            return $fragmentUri;
        }
        $fragmentUri = $this->signer
            ->sign($fragmentUri);
        return $absolute ? $fragmentUri : substr($fragmentUri, \strlen($request->getSchemeAndHttpHost()));
    }
    private function checkNonScalar(array $values) : void {
        foreach ($values as $key => $value) {
            if (\is_array($value)) {
                $this->checkNonScalar($value);
            }
            elseif (!\is_scalar($value) && null !== $value) {
                throw new \LogicException(\sprintf('Controller attributes cannot contain non-scalar/non-null values (value for key "%s" is not a scalar or null).', $key));
            }
        }
    }

}