Neos Form Builder Confirmation Finisher with Fluid

ConfirmationFinisher.php

<?php

namespace Visol\FoobarCom\Form\Finishers;

use Neos\Flow\Annotations as Flow;
use Neos\FluidAdaptor\View\StandaloneView;
use Neos\Form\Core\Model\AbstractFinisher;
use Neos\Form\Exception\FinisherException;
use Neos\Utility\ObjectAccess;

class ConfirmationFinisher extends AbstractFinisher
{

    /**
     * Executes this finisher
     * @see AbstractFinisher::execute()
     *
     * @return void
     * @throws FinisherException
     * @throws \Neos\FluidAdaptor\Exception
     */
    protected function executeInternal()
    {
        $formRuntime = $this->finisherContext->getFormRuntime();
        $standaloneView = $this->initializeStandaloneView();
        $standaloneView->assign('form', $formRuntime);
        $referrer = $formRuntime->getRequest()->getHttpRequest()->getUri();
        $standaloneView->assign('referrer', $referrer);
        $message = $standaloneView->render();
        $formRuntime->getResponse()->setContent($message);
    }

    /**
     * @return StandaloneView
     * @throws FinisherException
     * @throws \Neos\FluidAdaptor\Exception
     */
    protected function initializeStandaloneView()
    {
        $standaloneView = new StandaloneView();
        $standaloneView->setTemplateSource($messageDedodedGt);

        $standaloneView->assign('formValues', $this->finisherContext->getFormValues());
        if (isset($this->options['variables'])) {
            $standaloneView->assignMultiple($this->options['variables']);
        }
        return $standaloneView;
    }
}