GoogleHandler::getExportMimeByInternalMimeType

private function getExportMimeByInternalMimeType($internalMimeType)
{
	if(!$this->isGoogleDocument($internalMimeType))
	{
		return $internalMimeType;
	}

	$googleMimeTypes = array(
		'application/vnd.google-apps.document' => 'docx',
		'application/vnd.google-apps.spreadsheet' => 'xlsx',
		'application/vnd.google-apps.presentation' => 'pptx',
	);

	$filename = 'f';
	if(isset($googleMimeTypes[$internalMimeType]))
	{
		$filename = $filename . '.' . $googleMimeTypes[$internalMimeType];
	}

	return TypeFile::getMimeTypeByFilename($filename);
}