#!/usr/bin/env python

import os, re
from cgitools import *

user_id = os.getenv('PATH_INFO').strip()
if user_id: user_id = user_id[1:]
if not user_id: exitWithInfo('')

m = re.match(r'^[a-zA-Z0-9_]+$', user_id)
if not m: exitWithInfo('Invalid characters in the user ID, please change it.') 

n = inquireDB('SELECT user_name FROM users WHERE user_name="%s"' % user_id)
if n: msg = 'Unfortunately, this ID was taken alrealy.'
else: msg = 'Congratulations! This ID is still available.'

print cgi_token
print msg
