#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
    openslides.participant.api
    ~~~~~~~~~~~~~~~~~~~~~~~~~~

    Useful functions for the participant app.

    :copyright: 2011 by the OpenSlides team, see AUTHORS.
    :license: GNU GPL, see LICENSE for more details.
"""

from django.contrib.auth.models import User


def gen_username(first_name, last_name):
    testname = "%s%s" % (first_name, last_name)
    try:
        User.objects.get(username=testname)
    except User.DoesNotExist:
        return testname
    i = 0
    while True:
        i += 1
        testname = "%s%s%s" % (first_name, last_name, i)
        try:
            User.objects.get(username=testname)
        except User.DoesNotExist:
            return testname