Neos\Media\Browser\Controller\AssetController::uploadAction PHP Метод

    public function uploadAction(Asset $asset)
    {
        if (($tag = $this->browserState->get('activeTag')) !== null) {
            $asset->addTag($tag);
        }
        if ($this->persistenceManager->isNewObject($asset)) {
            $this->assetRepository->add($asset);
        } else {
            $this->assetRepository->update($asset);
        }
        if (($assetCollection = $this->browserState->get('activeAssetCollection')) !== null && $assetCollection->addAsset($asset)) {
            $this->assetCollectionRepository->update($assetCollection);
        }
        $this->addFlashMessage('assetHasBeenAdded', '', Message::SEVERITY_OK, [htmlspecialchars($asset->getLabel())]);
        $this->response->setStatus(201);
        return '';
    }