python-design-patterns/structual/facade_pattern.py at main · 5iing/python-design-patterns · GitHub

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from abc import *

class Device(ABC):
    @abstractmethod
    def power_on(self) -> None: ...

    @abstractmethod
    def power_off(self) -> None: ...

    @abstractmethod
    def volume_up(self) -> None: ...

    @abstractmethod
    def volume_down(self) -> None: ...

class Speaker(Device):
    def power_on(self):
        print(self.__class__.__name__, ": power on")

    def power_off(self):
        print(self.__class__.__name__, ": power off")

    def volume_up(self):
        print(self.__class__.__name__, ": volume up")

    def volume_down(self):
        print(self.__class__.__name__, ": volume down")

class Light(ABC):
    @abstractmethod
    def power_on(self) -> None: ...

    @abstractmethod
    def power_off(self) -> None: ...

class MoodLantern(Light):
    def power_on(self):
        print(self.__class__.__name__, ": power on")

    def power_off(self):
        print(self.__class__.__name__, ": power off")


class IotControllerFacade:
    def __init__(self, l: Light, d: Device):
        self.light = l
        self.device = d

    def light_on(self) -> None:
        self.light.power_on()

    def light_off(self) -> None:
        self.light.power_off()

    def device_on(self) -> None:
        self.device.power_on()

    def device_off(self) -> None:
        self.device.power_off()

if __name__ == '__main__':
    speaker = Speaker()
    lantern = MoodLantern()

    facade = IotControllerFacade(lantern, speaker)


    facade.light_on()
    facade.device_on()

    facade.device.volume_up()
    facade.device.volume_down()

    facade.light_off()
    facade.device_off()