Controller::processActionUploadChunk

protected function processActionUploadChunk()
{
	$this->checkRequiredPostParams(array('cloudImportId',));

	if($this->errorCollection->hasErrors())
	{
		$this->sendJsonErrorResponse();
	}

	$cloudImport = CloudImportEntry::load(array(
		'ID' => $this->request->getPost('cloudImportId'),
		'USER_ID' => $this->getUser()->getId(),
	));
	if(!$cloudImport)
	{
		$this->errorCollection->addOne(new Error('Could not find cloud import', self::ERROR_COULD_NOT_FIND_CLOUD_IMPORT));
		$this->sendJsonErrorResponse();
	}

	$documentHandlersManager = Driver::getInstance()->getDocumentHandlersManager();
	$documentHandler = $documentHandlersManager->getHandlerByCode($cloudImport->getService());
	if(!$documentHandler)
	{
		$this->errorCollection->add($documentHandlersManager->getErrors());
		$this->sendJsonErrorResponse();
	}
	if(!$documentHandler->checkAccessibleTokenService())
	{
		$this->errorCollection->add(array(new Error(Loc::getMessage('DISK_UF_CONTROLLER_ERROR_COULD_NOT_WORK_WITH_TOKEN_SERVICE_B24', array('#NAME#' => $documentHandler::getName())), self::ERROR_COULD_NOT_WORK_WITH_TOKEN_SERVICE)));
		$this->errorCollection->add($documentHandler->getErrors());
		$this->sendJsonErrorResponse();
	}

	if(!$documentHandler->queryAccessToken()->hasAccessToken() || $documentHandler->isRequiredAuthorization())
	{
		$this->sendNeedAuth($documentHandler->getUrlForAuthorizeInTokenService('opener'));
	}

	$importManager = new CloudImportImportManager($documentHandler);
	if(!$importManager->uploadChunk($cloudImport))
	{
		$this->errorCollection->add($importManager->getErrors());
		$this->sendJsonErrorResponse();
	}

	$this->sendJsonSuccessResponse(array(
		'step' => $cloudImport->isDownloaded()? 'finish' : 'download',
		'contentSize' => (int)$cloudImport->getContentSize(),
		'downloadedContentSize' => (int)$cloudImport->getDownloadedContentSize(),
	));
}