Newscoop\NewscoopBundle\Services\TopicService::saveTopicPosition PHP Méthode

    public function saveTopicPosition(Topic $node, $params)
    {
        if (isset($params['parent']) && $params['parent']) {
            $repository = $this->getTopicRepository();
            $parent = $repository->findOneBy(array('id' => $params['parent']));
            if (!$parent) {
                return false;
            }
            $node->setOrder(null);
            foreach ($params as $key => $isSet) {
                switch ($key) {
                    case 'first':
                        if ($isSet) {
                            $repository->persistAsFirstChildOf($node, $parent);
                        }
                        break;
                    case 'last':
                        if ($isSet) {
                            $repository->persistAsLastChildOf($node, $parent);
                        }
                        break;
                    case 'middle':
                        if ($isSet) {
                            $repository->persistAsNextSiblingOf($node, $parent);
                        }
                        break;
                    default:
                        break;
                }
            }
        }
        // when dragging children to roots
        if (isset($params['asRoot']) && $params['asRoot']) {
            $node->setParent(null);
        }
        $metadata = $this->em->getClassMetaData(get_class($node));
        $metadata->setIdGeneratorType(\Doctrine\ORM\Mapping\ClassMetadata::GENERATOR_TYPE_NONE);
        $this->em->flush();
        return true;
    }