class SerializerErrorRenderer

class SerializerErrorRenderer implements ErrorRendererInterface {
    private string|\Closure $format;
    private ErrorRendererInterface $fallbackErrorRenderer;
    private bool|\Closure $debug;
    
    /**
     * @param string|callable(FlattenException) $format The format as a string or a callable that should return it
     *                                                  formats not supported by Request::getMimeTypes() should be given as mime types
     * @param bool|callable                     $debug  The debugging mode as a boolean or a callable that should return it
     */
    public function __construct(SerializerInterface $serializer, string|callable $format, ?ErrorRendererInterface $fallbackErrorRenderer = null, bool|callable $debug = false) {
        $this->format = \is_string($format) ? $format : $format(...);
        $this->fallbackErrorRenderer = $fallbackErrorRenderer ?? new HtmlErrorRenderer();
        $this->debug = \is_bool($debug) ? $debug : $debug(...);
    }
    public function render(\Throwable $exception) : FlattenException {
        $headers = [
            'Vary' => 'Accept',
        ];
        $debug = \is_bool($this->debug) ? $this->debug : ($this->debug)($exception);
        if ($debug) {
            $headers['X-Debug-Exception'] = rawurlencode(substr($exception->getMessage(), 0, 2000));
            $headers['X-Debug-Exception-File'] = rawurlencode($exception->getFile()) . ':' . $exception->getLine();
        }
        $flattenException = FlattenException::createFromThrowable($exception, null, $headers);
        try {
            $format = \is_string($this->format) ? $this->format : ($this->format)($flattenException);
            $headers['Content-Type'] = Request::getMimeTypes($format)[0] ?? $format;
            $flattenException->setAsString($this->serializer
                ->serialize($flattenException, $format, [
                'exception' => $exception,
                'debug' => $debug,
            ]));
        } catch (NotEncodableValueException) {
            $flattenException = $this->fallbackErrorRenderer
                ->render($exception);
        }
        return $flattenException->setHeaders($flattenException->getHeaders() + $headers);
    }
    public static function getPreferredFormat(RequestStack $requestStack) : \Closure {
        return static function () use ($requestStack) {
            if (!($request = $requestStack->getCurrentRequest())) {
                throw new NotEncodableValueException();
            }
            return $request->getPreferredFormat();
        };
    }

}