garage/garage.py

import json
import sys

from configparser import ConfigParser
from gpiozero import Button
from signal import pause
from signal import signal
from signal import SIGTERM
from threading import Lock

state = {"east-door": "opened", "west-door": "opened"}
threadLock = Lock()
stateFile = 'www/garage.json'


def main():
    signal(SIGTERM, cleanExit())
    config = ConfigParser()
    config.read('garage.cfg')
    eastPin = config['garage'].getint('east-pin')
    westPin = config['garage'].getint('west-pin')
    # eastUri = config['push'].getint('east-uri')
    # westUri = config['push'].getint('west-uri')

    persistState()

    eastButton = Button(eastPin)
    westButton = Button(westPin)

    eastButton.when_pressed = eastDoorClosed
    eastButton.when_released = eastDoorOpened
    westButton.when_pressed = westDoorClosed
    westButton.when_released = westDoorOpened

    pause()


def eastDoorOpened():
    try:
        threadLock.aquire()
        state["east-door"] = "opened"
        persistState()
    finally:
        threadLock.release()


def eastDoorClosed():
    try:
        threadLock.aquire()
        state["east-door"] = "closed"
        persistState()
    finally:
        threadLock.release()


def westDoorOpened():
    try:
        threadLock.aquire()
        state["west-door"] = "opened"
        persistState()
    finally:
        threadLock.release()


def westDoorClosed():
    try:
        threadLock.aquire()
        state["west-door"] = "closed"
        persistState()
    finally:
        threadLock.release()


def persistState():
    with open(stateFile, 'w') as file:
        json.dump(state, file)


def cleanExit():
    def _exit_(signum, frame):
        sys.exit(0)

    return _exit_


if __name__ == '__main__':
    main()