[Sylius] autoaccepting new reviews; disable accept state after creating a new review

CustomAverageRatingUpdater.php

<?php

namespace AppBundle\Resolver;

use Doctrine\Common\Persistence\ObjectManager;
use Sylius\Bundle\ReviewBundle\Updater\ReviewableRatingUpdaterInterface;
use Sylius\Component\Review\Calculator\ReviewableRatingCalculatorInterface;
use Sylius\Component\Review\Model\ReviewableInterface;
use Sylius\Component\Review\Model\ReviewInterface;

/**
 * @author Mateusz Zalewski <mateusz.zalewski@lakion.com>
 * @author Grzegorz Sadowski <grzegorz.sadowski@lakion.com>
 */
final class CustomAverageRatingUpdater implements ReviewableRatingUpdaterInterface {

    /**
     * @var ReviewableRatingCalculatorInterface
     */
    private $averageRatingCalculator;

    /**
     * @var ObjectManager
     */
    private $reviewSubjectManager;

    /**
     * @param ReviewableRatingCalculatorInterface $averageRatingCalculator
     * @param ObjectManager $reviewSubjectManager
     */
    public function __construct(
        ReviewableRatingCalculatorInterface $averageRatingCalculator,
        ObjectManager $reviewSubjectManager
    ) {
        $this->averageRatingCalculator = $averageRatingCalculator;
        $this->reviewSubjectManager = $reviewSubjectManager;
    }

    public function update(ReviewableInterface $reviewSubject) {
        $this->modifyReviewSubjectAverageRating($reviewSubject);
    }

    public function updateFromReview(ReviewInterface $review) {
        $this->modifyReviewSubjectAverageRating($review->getReviewSubject());
    }

    /**
     * @param ReviewableInterface $reviewSubject
     */
    private function modifyReviewSubjectAverageRating(ReviewableInterface $reviewSubject)
    {
        $averageRating = $this->averageRatingCalculator->calculate($reviewSubject);
        $reviewSubject->setAverageRating($averageRating);
        $this->reviewSubjectManager->persist($reviewSubject);
        $this->reviewSubjectManager->flush();
    }
}

product_review.yml

# app\Resources\SyliusShopBundle\config\routing\product_review.yml

sylius_shop_product_review_create:
    path: /new
    methods: [GET, POST]
    defaults:
        _controller: sylius.controller.product_review:createAction
        _sylius:
            template: "@SyliusShop/ProductReview/create.html.twig"
            form:
                options:
                    validation_groups: ['ignore-default', 'sylius_review']
            factory:
                method: createForSubjectWithReviewer
                arguments:
                    - "expr:notFoundOnNull(service('sylius.repository.product').findOneByChannelAndSlug(service('sylius.context.channel').getChannel(), service('sylius.context.locale').getLocaleCode(), $slug))"
                    - "expr:service('sylius.context.customer').getCustomer()"
            redirect:
                route: sylius_shop_product_show
                parameters:
                    slug: $slug
            flash: sylius.review.wait_for_the_acceptation
            state_machine:
                graph: sylius_product_review
                transition: accept

services.yml

# app/config/services.yml
sylius.product_review.average_rating_updater:
        class: AppBundle\Resolver\CustomAverageRatingUpdater
        arguments:
            - "@sylius.average_rating_calculator"
            - "@sylius.manager.product_review"