class StorageServiceInterface:

    name = "StorageServiceInterface"

    @staticmethod
    def get_last_modified(filename: str):
        """Get last modified time of file

        :param filename: filename
        :return: Date of last modification or None
        """
        pass

    @staticmethod
    def check() -> bool:
        pass

    @staticmethod
    def create_file(filename: str, file: bytes) -> bool:
        """Create / save (or overwrite) an file on the storage.

        :param filename: filename
        :param file: bytes representation of the file
        :return: Whether file was successfully uploaded
        """
        pass

    @staticmethod
    def read_file(filename: str) -> bytes:
        """Read  file on the storage.

        :param filename: filename
        :return: bytes representation of the file or None on error
        """
        pass

    @staticmethod
    def update_file(filename: str, file: bytes) -> bool:
        """Update (currently: overwrite) an file on the storage.

        :param filename: filename of the file
        :param file: bytes representation of the file
        :return: Whether file was successfully uploaded
        """
        pass

    @staticmethod
    def delete_file(filename: str) -> bool:
        """Delete an file from the storage.

        :param filename: filename of the file
        :return: Whether file was successfully deleted
        """
        pass

    @staticmethod
    def delete_all() -> bool:
        """Delete every file from the storage.

        :return: Whether the storage was successfully emptied
        """
        pass