from enum import Enum


class Command(Enum):
    """
    All supported commands.

    Values are as supplied by the calling VM (sd-app), and a change in any values requires
    corresponding changes in the calling VM.
    """

    PRINTER_PREFLIGHT = "printer-preflight"
    PRINTER_TEST = "printer-test"
    PRINT = "printer"
    CHECK_USBS = "usb-test"
    CHECK_VOLUME = "disk-test"
    EXPORT = "disk"
    START_VM = ""