#!/usr/bin/python
import urllib
import time

#User configurable parameters
username = 'yourusername'
password = 'yourpassword'
iss = 'true' # false if you want to open some ports for the outside world
retries = 15
authUrl = 'https://auth.lawn.gatech.edu/index.php'
statUrl = 'https://auth.lawn.gatech.edu/login_status.php'
logoutUrl = 'https://auth.lawn.gatech.edu/logout.php?output=text'
sleep_time = 1

# Check if we are logged into the system
def checking_status():
    f = urllib.urlopen(statUrl)
    stat = f.read()
    if stat.find("logged_in") > -1 :
	print "You are logged into LAWN"
	f.close()
	return True
    else:
	f.close()
	return False

# If we aren't already logged in, make a request for logging in
def make_POST_request():
    data = urllib.urlencode({"username":username, "password":password, "iss": iss, "output":"cli"})
    f = urllib.urlopen(authUrl, data)
    f.close()


# Logout of LAWN. Unused as of now
def do_logout():
    f = urllib.urlopen(logoutUrl)
    print "Logging out ..."
    f.close()

# Main routine
if not checking_status():
    make_POST_request()
    print "Logging in ..."
    tries = 1
    while tries < retries:
	if checking_status():
	    break
	tries += 1
	time.sleep(sleep_time)
    if tries == retries:
	print "FAILURE: Tried 15 times but couldn't log in"