DiskStorage::addFile

public function addFile($name, $targetDirectoryId, TmpFile $tmpFile, array $data = array())
{
	$this->addShutdownTask(function() use($tmpFile){
		$tmpFile->delete();
	});

	if(!$targetDirectoryId)
	{
		$folder = $this->storage->getRootObject();
	}
	else
	{
		$folder = Folder::loadById($targetDirectoryId);
	}
	/** @var Folder $folder */
	if(!$folder)
	{
		$this->errorCollection->add(array(new Error("Could not " . __METHOD__ . " by id {$targetDirectoryId}", 11152)));
		return array();
	}

	if(!$folder->canAdd($this->storage->getSecurityContext($this->userId)))
	{
		throw new AccessDeniedException;
	}

	/** @var array $fileArray */
	if($tmpFile->isCloud() && $tmpFile->getContentType())
	{

		$fileId = CFile::saveFile(array(
			'name' => $tmpFile->getFilename(),
			'tmp_name' => $tmpFile->getAbsolutePath(),
			'type' => $tmpFile->getContentType(),
			'width' => $tmpFile->getWidth(),
			'height' => $tmpFile->getHeight(),
			'MODULE_ID' => Driver::INTERNAL_MODULE_ID,
		), Driver::INTERNAL_MODULE_ID, true, true);
		if(!$fileId)
		{
			$this->errorCollection->add(array(new Error("Could not " . __METHOD__ . ", save cloud file", 111588)));

			return array();
		}

		$fileArray = CFile::getFileArray($fileId);
		if(!$fileArray)
		{
			$this->errorCollection->add(array(new Error("Could not " . __METHOD__ . ", getFileArray", 191588)));

			return array();
		}

		$fileData = array(
			'NAME' => $name,
			'FILE_ID' => $fileId,
			'SIZE' => !isset($data['SIZE'])? $fileArray['FILE_SIZE'] : $data['SIZE'],
			'CREATED_BY' => $this->getUser()->getId(),
		);
		if(!empty($data['originalTimestamp']))
		{
			$fileData['UPDATE_TIME'] = DateTime::createFromTimestamp($this->convertFromExternalVersion($data['originalTimestamp']));
		}
		$fileModel = $folder->addFile($fileData);
		if(!$fileModel)
		{
			CFile::delete($fileId);
		}
	}
	else
	{
		$fileArray = CFile::makeFileArray($tmpFile->getAbsolutePath());
		if(!$fileArray)
		{
			$this->errorCollection->addOne(new Error("Could not " . __METHOD__ . " MakeFileArray", 110155));

			return array();
		}

		$fileArray['name'] = $name;
		$fileData = array('NAME' => $name, 'CREATED_BY' => $this->getUser()->getId());
		if(!empty($data['originalTimestamp']))
		{
			$fileData['UPDATE_TIME'] = DateTime::createFromTimestamp($this->convertFromExternalVersion($data['originalTimestamp']));
		}

		$fileArray['no_rotate'] = true;
		$fileModel = $folder->uploadFile($fileArray, $fileData);
		//it's crutch. There is process of name correction in uploadFile but we don't want to do it.
		//And we don't want to add new parameters to manage it. In this case we restore name by renaming.
		if ($fileModel && $fileModel->getName() != $name)
		{
			$fileModel->rename($name);
		}
	}

	if($fileModel)
	{
		if (TypeFile::isImage($fileModel))
		{
			$this->processImageRotate($tmpFile, $fileModel);
		}

		$fileModel->changeEtag($tmpFile->getToken());
		$this->loadTree();

		$response = $this->formatFileToResponse($fileModel);
		Driver::getInstance()->sendEvent($this->userId, 'fileUploaded', $response);

		return $response;
	}
	$this->errorCollection->add(array(new Error("Could not " . __METHOD__ . ", uploadFile to {$targetDirectoryId}", 11153)));
	$this->errorCollection->add($folder->getErrors());

	return array();
}