Psr7Middlewares\Middleware\JsonValidator::__invoke PHP Метод

    public function __invoke(ServerRequestInterface $request, ResponseInterface $response, callable $next)
    {
        $value = $request->getParsedBody();
        if (!is_object($value)) {
            return $this->invalidateResponse($response, sprintf('Parsed body must be an object. Type %s is invalid.', gettype($value)));
        }
        $validator = new Validator();
        $validator->check($value, $this->schema);
        if (!$validator->isValid()) {
            return $this->invalidateResponse($response, 'Unprocessable Entity', ['Content-Type' => 'application/json'], json_encode($validator->getErrors(), JSON_UNESCAPED_SLASHES));
        }
        return $next($request, $response);
    }