Synnefo

# Copyright 2011 GRNET S.A. All rights reserved.

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# Business Logic for working with users

from django.conf import settings

from synnefo.db.models import SynnefoUser

from django.db import transaction

import hashlib

import time

import string

from datetime import datetime, timedelta

@transaction.commit_on_success

def _register_user(f, u, unq, t):

    user = SynnefoUser()

    user.realname = f

    user.name = u

    user.uniq = unq

    user.type = t

    user.credit = 10 #TODO: Fix this when we have a per group policy

    user.save()

    create_auth_token(user)

def create_uname(fullname):

    fullname = fullname.strip()

    uname = None

    if fullname.find(' ') is not -1:

        (name, surname) = (fullname.split(' ')[0], string.join(fullname.split(' ')[-1:], ''))

        uname = "%s%s" % (string.join(surname[0:7],''), name[0])

        uname = uname.lower()

    else:

        uname = fullname[0:7].lower()

    return uname

@transaction.commit_on_success

def delete_user(user):

    if user is not None:

        user.delete()

def register_student(fullname, username, uniqid):

    _register_user(fullname, username, uniqid, 'STUDENT')

def register_professor(fullname, username, uniqid):

    _register_user(fullname, username, uniqid, 'PROFESSOR')

def register_user(fullname, email):

    uname = create_uname (fullname)

    _register_user(fullname, uname, email, 'USER')

@transaction.commit_on_success

def create_auth_token(user):

    md5 = hashlib.md5()

    md5.update(user.uniq)

    md5.update(user.name.encode('ascii', 'ignore'))

    md5.update(time.asctime())

    user.auth_token = md5.hexdigest()

    user.auth_token_created = datetime.now()

    user.auth_token_expires = user.auth_token_created + \

                              timedelta(hours=settings.AUTH_TOKEN_DURATION)

    user.save()

@transaction.commit_on_success

def create_tmp_token(user):

    md5 = hashlib.md5()

    md5.update(user.uniq)

    md5.update(user.name.encode('ascii', 'ignore'))

    md5.update(time.asctime())

    user.tmp_auth_token = md5.hexdigest()

    user.tmp_auth_token_expires = datetime.now() + \

                                  timedelta(minutes=settings.HELPDESK_TOKEN_DURATION_MIN)

    user.save()