# -*- coding: utf-8
# -*- Mode: Python; py-indent-offset: 4 -*-
# $Id$
#
# Copyright (c) 2006, Vahur Rebas <vahur@tlu.ee>
#
# Permission to use, copy, modify, and distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
           

""" utils """

__version__ = "$Revision$"[11:-2]

from random import randint
MAX_UNIQUEID_ATTEMPTS = 1000

def generateId(self, prefix='item', suffix='', rand_ceiling=999999999999):
    """ method copied from BTreeFolder """
    id = 0
    while 1:
        n = randint(1, rand_ceiling)
        id = '%s%d%s' % (prefix, n, suffix)
        if not hasattr(self, id):
            break
        attempt = attempt + 1
        if attempt > MAX_UNIQUEID_ATTEMPTS:
            # Prevent denial of service
            raise 'Error: cannot find uniq id'
    return id

def get_text(elem):
    res = u''
    if not elem:
        return ''
    for line in elem.childNodes:
        res += line.nodeValue
    return res.encode('utf-8')

def getChildNode(elem, target_name):
    for x in elem.childNodes:
        if x.nodeName == target_name:
            return x
    return None

from time import time
from md5 import md5
from random import random
def gen_key(arg):
    t = str(time() * 1000L)
    r = str(random()*100000000000000000L)
    data = arg+ ' '+ t +' '+ r
    uid = md5(data).hexdigest()
    return uid

# EOF