#!/usr/local/bin/python
import sys
import traceback
import os
from threading import Thread
import time
from datetime import datetime
import constants
import renderer
import renderer
import renderer_catalog
import chooser
import logging
import trigger_catalog
import utils
def thread_change_current():
page_chooser = chooser.weighted_random_chooser_with_triggers(
trigger_catalog.get_triggers())
swap_page_target = 0
last_page = ""
while True:
now = time.time()
(page, triggered) = page_chooser.choose_next_page()
if triggered:
print('chooser[%s] - WE ARE TRIGGERED.' % utils.timestamp())
if page != last_page:
print('chooser[%s] - EMERGENCY PAGE %s LOAD NEEDED' % (
utils.timestamp(), page))
f = open(os.path.join(constants.pages_dir,
"current.shtml"), "w")
emit_wrapped(f, page)
f.close()
# Notify XMLHTTP clients that they need to refresh now.
path = os.path.join(constants.pages_dir,
"reload_immediately.html")
f = open(path, 'w')
f.write("Reload, suckers!")
f.close()
time.sleep(0.750)
os.remove(path)
last_page = page
swap_page_target = now + constants.refresh_period_sec
elif now >= swap_page_target:
if (page == last_page):
print('chooser[%s] - nominal choice got the same page...' % (
utils.timestamp()))
continue
print('chooser[%s] - nominal choice of %s' % (utils.timestamp(), page))
try:
f = open(os.path.join(constants.pages_dir,
"current.shtml"), "w")
emit_wrapped(f, page)
f.close()
last_page = page
swap_page_target = now + constants.refresh_period_sec
except:
print('chooser[%s] - page does not exist?!' % (utils.timestamp()))
continue
time.sleep(1.0)
def pick_background_color():
now = datetime.now()
if now.hour <= 6 or now.hour >= 21:
return "E6B8B8"
elif now.hour == 7 or now.hour == 20:
return "EECDCD"
else:
return "FFFFFF"
def emit_wrapped(f, filename):
age = utils.describe_age_of_file_briefly("pages/%s" % filename)
bgcolor = pick_background_color()
f.write("""
Kitchen Kiosk
""" % (bgcolor,
constants.refresh_period_sec * 1000,
bgcolor,
filename,
filename,
age))
def thread_invoke_renderers():
while True:
for r in renderer_catalog.get_renderers():
try:
r.render()
except Exception as e:
traceback.print_exc()
print("renderer[%s] unknown exception, swallowing it." % (
utils.timestamp()))
except Error as e:
traceback.print_exc()
print("renderer[%s] unknown error, swallowing it." % (
utils.timestamp()))
time.sleep(constants.render_period_sec)
if __name__ == "__main__":
logging.basicConfig()
changer_thread = None
renderer_thread = None
while True:
if (changer_thread == None or
not changer_thread.is_alive()):
print("chooser[%s] - (Re?)initializing chooser thread..." % utils.timestamp())
changer_thread = Thread(target = thread_change_current, args=())
changer_thread.start()
if (renderer_thread == None or
not renderer_thread.is_alive()):
print("renderer[%s] - (Re?)initializing render thread..." % utils.timestamp())
renderer_thread = Thread(target = thread_invoke_renderers, args=())
renderer_thread.start()
time.sleep(10000)
print("Should never get here.")