#!/usr/bin/env python

# -*- coding: UTF-8 -*-

from __future__ import print_function

import sys, os

import cgi

import time

def cgi_callback():

params = cgi.parse_qs(os.environ['QUERY_STRING'])

# lastts is the last modified date that this browser has already loaded, 0 means this is an initial request

lastts = 0

if params.has_key('ts'):

lastts = int(params['ts'][0])

# keep count of the number of times waiting so this takes no longer than 30 sec to respond

attempt = 0

ts = ''

while ts == '':

attempt += 1

try:

stats = os.stat('fogbugz.json')

if (attempt > 56 or int(stats.st_mtime) > lastts):

# the file either has new data, or we've been waiting long enough, exit the loop

ts = int(stats.st_mtime)

else:

# the file has no new data, wait a half a second and try again

time.sleep(0.5)

except:

break

if ts == "":

# a file was not found, return invalid JSON to raise an error in the UI

json = 'Show fail whale because refreshFogBugz.py has never been called'

ts = 0

else:

f = open('fogbugz.json')

json = f.read()

f.close()

if json == '':

json = '[]'

print('Content-Type: application/javascript\n')

# remember this last modified ts, so future requests can tell if there's new data

print('URL_SUFFIX = "&ts=%s";' % (ts))

# if responding immediately then kick off another read

if attempt == 1 and not params.has_key('ts'):

print('setTimeout(updateSolariBoard, 1000);')

# support a callback param, or default to "void"

callback = 'void'

if params.has_key('callback'):

callback = params['callback'][0]

# send the json to jQuery's callback

print('%s(%s);' % (callback,json))

if __name__ == '__main__':

cgi_callback()