registerEventListener NodeDeletedEvent NodeWrittenEvent UserDeletedEvent $tempImage $tempImage $tempImage $tempImage ?TempImage TempImage OCP_Image $img $img $img $img $img $this->rootFolder IRootFolder IRootFolder OCP_Image OCP_Image $creationTime is_a($creationTime, 'DateTime') Image LoadSidebarListener NodeDeletedEvent PostDeleteListener NodeWrittenEvent PostWriteListener UserDeletedEvent UserDeletedListener $response $response $response IRootFolder IRootFolder ($localPath !== false) ? $localPath : null string|null $this->rootFolder $this->rootFolder $this->rootFolder IRootFolder IRootFolder StorageNotAvailableException $buffer === false $buffer === false $this->rootFolder IRootFolder IRootFolder $this->rootFolder $this->rootFolder IRootFolder IRootFolder