chickenhouse/src/gate_guard.py

from communiate.protocol import mqtt
from gate.gate_state import gate_state
from light_data.light_data import light_data
from light_sensor.light_sensor import light_sensor

import sys
import time

class gate_guard:
	def __init__(self):
		self.__light_read_delay_s = 6
		self.__consequtive_light_reads = 10
		self.__light_lx_close = 0
		self.__light_lx_open = 0

		self.__light_sensor = light_sensor(1, 0x23)
		self.__light_data = light_data(self.__consequtive_light_reads)
		self.__comserver = mqtt("gitlab")
		self.__gate_state = gate_state()

	def close_gate(self):
		topic = "outdoor/chickenhouse/gate"
		payload = str(time.time()) + " closing"
		self.__comserver.connect()
		self.__comserver.transmit(topic, payload)
		self.__comserver.disconnect()
		return None

	def open_gate(self):
		topic = "outdoor/chickenhouse/gate"
		payload = str(time.time()) + " opening"
		self.__comserver.connect()
		self.__comserver.transmit(topic, payload)
		self.__comserver.disconnect()
		return None
	
	def handle_gate_state(self, light_avg=0):
		if self.__gate_state.get_state() == "open":
			if light_avg <= self.__light_lx_close:
				self.close_gate()
		elif self.__gate_state.get_state() == "close":
			if light_avg >= self.__light_lx_open:
				self.open_gate()
		elif self.__gate_state.get_state() == "unknown":
			'''TODO: bring gate in a defined position'''

	def run(self):

		if self.__gate_state.get_state() == "unknown":
			self.handle_gate_state()

		try:
			while True:
				light_data.push(light_sensor.read())
				light_avg = light_data.average()
				if light_avg:
					print "light average: " + str(light_avg)
					self.handle_gate_state(light_avg)
				time.sleep(self.__light_read_delay_s)

		except KeyboardInterrupt:
			return None

if __name__ == "__main__":
	gate_guard = gate_guard()
	sys.exit(gate_guard.run())