controller render block

AbstractController.php

<?php 

protected function renderView(string $view, array $parameters = []): string
{
    if (!$this->container->has('twig')) {
        throw new \LogicException('You cannot use the "renderView" method if the Twig Bundle is not available. Try running "composer require symfony/twig-bundle".');
    }

    return $this->container->get('twig')->render($view, $this->normalizeViewParameters($parameters));
}

protected function renderViewBlock(string $view, string $block, array $parameters = []): string
{
    if (!$this->container->has('twig')) {
        throw new \LogicException('You cannot use the "renderViewBlock" method if the Twig Bundle is not available. Try running "composer require symfony/twig-bundle".');
    }

    return $this->container->get('twig')->load($view)->renderBlock($block, $this->normalizeViewParameters($parameters));
}

protected function render(string $view, array $parameters = [], Response $response = null): Response
{
    $content = $this->renderView($view, $parameters);

    return $this->prepareResponse($response ?? new Response(), $parameters, $content);
}

protected function renderBlock(string $view, string $block, array $parameters = [], Response $response = null): Response
{
    $content = $this->renderViewBlock($view, $block, $parameters);

    return $this->prepareResponse($response ?? new Response(), $parameters, $content);
}

private function normalizeViewParameters(array $parameters): array
{
    foreach ($parameters as $k => $v) {
        if ($v instanceof FormInterface) {
            $parameters[$k] = $v->createView();
        }
    }

    return $parameters;
}

private function prepareResponse(Response $response, array $parameters, string $content): Response
{
    if (200 === $response->getStatusCode()) {
        foreach ($parameters as $v) {
            if ($v instanceof FormInterface && $v->isSubmitted() && !$v->isValid()) {
                $response->setStatusCode(422);
                break;
            }
        }
    }

    $response->setContent($content);

    return $response;
}