Controller::processActionLoadItems

protected function processActionLoadItems()
{
	$this->checkRequiredPostParams(array(
		'FORM_TAB_TYPE', 'FORM_TAB_ID', 'FORM_PATH',
	));
	if($this->errorCollection->hasErrors())
	{
		$this->sendJsonErrorResponse();
	}
	$dialogName = $this->request->getPost('FORM_NAME') ?: 'DiskFileDialog';
	$typeStorage = mb_strtolower($this->request->getPost('FORM_TAB_TYPE'));
	if(!in_array($typeStorage, array('user', 'common', 'group', 'cloud', 'recently_used'), true))
	{
		$this->errorCollection->add(array(new Error("Invalid storage type {$typeStorage}")));
		$this->sendJsonErrorResponse();
	}
	$storageId = (int)$this->request->getPost('FORM_TAB_ID');
	$path = $this->request->getPost('FORM_PATH');

	$storage = null;
	if($typeStorage === 'recently_used')
	{
		$this->sendJsonSuccessResponse(array(
			'FORM_NAME' => $dialogName,
			'FORM_ITEMS' => Driver::getInstance()->getRecentlyUsedManager()->getFileListByUser($this->getUser()->getId()),
			'FORM_ITEMS_DISABLED' => array(),
			'FORM_PATH' => $path,
			'FORM_IBLOCK_ID' => 0,
		));
	}
	elseif($typeStorage === 'cloud')
	{
		$documentHandlersManager = Driver::getInstance()->getDocumentHandlersManager();
		$documentHandler = $documentHandlersManager->getHandlerByCode($this->request->getQuery('service'));
		if(!$documentHandler)
		{
			$this->errorCollection->add($documentHandlersManager->getErrors());
			$this->sendJsonErrorResponse();
		}
		if (!($documentHandler instanceof CloudImportInterface))
		{
			$this->errorCollection[] = new Error("Document handler {{$documentHandler::getCode()}} does not implement " . CloudImportInterface::class);
			$this->sendJsonErrorResponse();
		}
		if(!$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'));
		}

		$itemsCloud = $this->listItemsCloud($documentHandler, $path);
		if($itemsCloud === null && $documentHandler->isRequiredAuthorization())
		{
			$this->sendNeedAuth($documentHandler->getUrlForAuthorizeInTokenService('opener'));
		}
		$this->sendJsonSuccessResponse(array(
			'sortMode' => InternalsGridFolderListOptions::SORT_MODE_ORDINARY,
			'FORM_NAME' => $dialogName,
			'FORM_ITEMS' => $itemsCloud,
			'FORM_ITEMS_DISABLED' => array(),
			'FORM_PATH' => $path,
			'FORM_IBLOCK_ID' => 0,
		));
	}
	else
	{
		$storage = $this->getStorageByType($typeStorage, $storageId);
	}

	if(!$storage)
	{
		$this->errorCollection->add(array(new Error('Could not find storage for current user')));
		$this->sendJsonErrorResponse();
	}
	$options = new InternalsGridFolderListOptions($storage);
	$this->sendJsonSuccessResponse(array(
		'sortMode' => $options->getSortMode(),
		'FORM_NAME' => $dialogName,
		'FORM_ITEMS' => $this->listItems($storage, $path),
		'FORM_ITEMS_DISABLED' => array(),
		'FORM_PATH' => $path,
		'FORM_IBLOCK_ID' => 0,
	));

}