Synnefo

# Copyright 2011-2012 GRNET S.A. All rights reserved.

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from django.core.urlresolvers import reverse

from django.shortcuts import redirect

from django.utils.translation import ugettext as _

from django.contrib import messages

from django.utils.http import urlencode

from django.contrib.auth import login as auth_login, authenticate

from django.http import HttpResponse

from urllib import quote

from urlparse import urlunsplit, urlsplit

from astakos.im.settings import COOKIE_NAME, COOKIE_DOMAIN

from astakos.im.util import set_cookie

import logging

logger = logging.getLogger(__name__)

def login(request):

    """

    If the request user is authenticated, redirects to `next` request parameter

    if exists, otherwise redirects to astakos index page displaying an error

    message.

    If the request user is not authenticated, redirects to login in order to

    return back here after successful login.

    """

    if request.user.is_authenticated():

        next = request.GET.get('next')

        renew = request.GET.get('renew', None)

        if next:

            response = HttpResponse()

            if renew == '':

                request.user.renew_token()

                request.user.save()

                # authenticate before login

                user = authenticate(email=request.user.email, auth_token=request.user.auth_token)

                auth_login(request, user)

                set_cookie(response, user)

                logger.info('Token reset for %s' % request.user.email)

            parts = list(urlsplit(next))

            parts[3] = urlencode({'user': request.user.email, 'token': request.user.auth_token})

            url = urlunsplit(parts)

            response['Location'] = url

            response.status_code = 302

            return response

        else:

            msg = _('No next parameter')

            messages.add_message(request, messages.ERROR, msg)

            url = reverse('astakos.im.views.index')

            return redirect(url)

    else:

        # redirect to login with self as next

        url = reverse('astakos.im.views.index')

        url = '%s?next=%s' % (url, quote(request.build_absolute_uri()))

        return redirect(url)