Eye Care 20-20-20 rule

eye_care.py

from os import popen, system
from time import sleep

# Note: this requires brightness package to be installed from homebrew
# https://brew.sh
# brew update; brew upgrade; brew install brightness

# #future -- rewite as shell script..no need for py

CURRENT_BRIGHTNESS = 1

def _set_current_brightness():
	CURRENT_BRIGHTNESS = popen("brightness -l | grep brightness | awk -F' ' '{print $4}'").read().replace('\n', '')

def full_dim():
	system('brightness 0')

def un_dim():
	system('brightness %s' % CURRENT_BRIGHTNESS)

def say(msg):
	system('say %s' % msg)

def timer_count(seconds):
	timer = 0
	while(timer <= seconds):
		say(timer)
		timer += 1

def main():
	while (True):
		# go to seep for 20 min
		say('Setting the timer for 20 min')
		sleep(20*60)
	
		# begin the counter for 20 seconds
		_set_current_brightness()
		full_dim()
		say('Look away for 20 seconds at an object that is 20 feet away')
		timer_count(20)
		un_dim()

if __name__ == "__main__":
	say('Running eyecare services')
	main()