DiskStorage::updateFile

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

	/** @var File $file */
	$file = File::loadById($targetElementId);
	if(!$file)
	{
		$this->errorCollection->add(array(new Error("Could not " . __METHOD__ . " by id {$targetElementId}", 11154)));
		return false;
	}

	if(!$file->canUpdate($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);

		$fileArray = CFile::getFileArray($fileId);
		if(!$fileArray)
		{
			$this->errorCollection->add(array(new Error("Could not " . __METHOD__ . " getFileArray", 1115541)));
			return false;
		}
		if(!empty($data['originalTimestamp']))
		{
			$fileArray['UPDATE_TIME'] = DateTime::createFromTimestamp($this->convertFromExternalVersion($data['originalTimestamp']));
		}
		if($file->addVersion($fileArray, $this->getUser()->getId()))
		{
			$file->changeEtag($tmpFile->getToken());
			$this->loadTree();

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

			return $response;
		}
		elseif($file->getErrorByCode($file::ERROR_EXCLUSIVE_LOCK))
		{
			$forkedFile = $this->processWithLockedFile($file, $fileArray, $fileId);
			if($forkedFile)
			{
				$this->errorCollection->clear();
				$this->errorCollection[] = new Error(
					'Created a new file.',
					self::ERROR_CREATE_FORK_FILE,
					$forkedFile
				);
			}
		}
		else
		{
			CFile::delete($fileId);
		}
	}
	else
	{
		$fileArray = CFile::makeFileArray($tmpFile->getAbsolutePath());
		if(!$fileArray)
		{
			$this->errorCollection->add(array(new Error("Could not " . __METHOD__ . " MakeFileArray", 11155)));
			return false;
		}
		if(!empty($data['originalTimestamp']))
		{
			$fileArray['UPDATE_TIME'] = DateTime::createFromTimestamp($this->convertFromExternalVersion($data['originalTimestamp']));
		}
		if($file->uploadVersion($fileArray, $this->getUser()->getId()))
		{
			$file->changeEtag($tmpFile->getToken());
			$this->loadTree();

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

			return $response;

		}
		elseif($file->getErrorByCode($file::ERROR_EXCLUSIVE_LOCK))
		{
			$forkedFile = $this->processWithLockedFile($file, $fileArray);
			if($forkedFile)
			{
				$this->errorCollection->clear();
				$this->errorCollection[] = new Error(
					'Created a new file.',
					self::ERROR_CREATE_FORK_FILE,
					$forkedFile
				);
			}
		}
	}

	$this->errorCollection->add(array(new Error("Could not " . __METHOD__ . ", uploadVersion", 11156)));
	$this->errorCollection->add($file->getErrors());

	return false;
}