"""Tool functions for GNUViech administration tool

(c) 2004 Jan Dittberner <jan@gnuviech.info>
"""

import random, re
from gnuviech import GNVPrefs

def generatePassword():
    return "".join([chr(char) for char in
                    random.sample(GNVPrefs.PWDCHARS,
                                  random.randint(GNVPrefs.PWDMINLENGTH,
                                                 GNVPrefs.PWDMAXLENGTH))])

def checkEmail(email):
    """Returns a match object if the given email address is syntactically
    correct otherwise it returns None"""
    # regex for email check
    p = re.compile(r'^([a-zA-Z0-9_\-.]+)@([a-zA-Z0-9\-]+(\.|[a-zA-Z0-9\-]+)*\.[a-z]{2,5})$')
    return p.search(email)