Synnefo

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from django.http import HttpResponseBadRequest

from django.utils.translation import ugettext as _

from django.contrib import messages

from django.template import RequestContext

from astakos.im.util import prepare_response, get_context

from astakos.im.views import requires_anonymous, render_response

from astakos.im.models import AstakosUser

from astakos.im.forms import LoginForm

from astakos.im.activation_backends import get_backend, SimpleBackend

class Tokens:

    # these are mapped by the Shibboleth SP software

    SHIB_EPPN = "HTTP_EPPN" # eduPersonPrincipalName

    SHIB_NAME = "HTTP_SHIB_INETORGPERSON_GIVENNAME"

    SHIB_SURNAME = "HTTP_SHIB_PERSON_SURNAME"

    SHIB_CN = "HTTP_SHIB_PERSON_COMMONNAME"

    SHIB_DISPLAYNAME = "HTTP_SHIB_INETORGPERSON_DISPLAYNAME"

    SHIB_EP_AFFILIATION = "HTTP_SHIB_EP_AFFILIATION"

    SHIB_SESSION_ID = "HTTP_SHIB_SESSION_ID"

    SHIB_MAIL = "HTTP_SHIB_MAIL"

@requires_anonymous

def login(request, backend=None, on_login_template='im/login.html',

    on_creation_template='im/third_party_registration.html',

    extra_context=None

):

    tokens = request.META

    try:

        eppn = tokens[Tokens.SHIB_EPPN]

    except KeyError:

        return HttpResponseBadRequest("Missing unique token in request")

    if Tokens.SHIB_DISPLAYNAME in tokens:

        realname = tokens[Tokens.SHIB_DISPLAYNAME]

    elif Tokens.SHIB_CN in tokens:

        realname = tokens[Tokens.SHIB_CN]

    elif Tokens.SHIB_NAME in tokens and Tokens.SHIB_SURNAME in tokens:

        realname = tokens[Tokens.SHIB_NAME] + ' ' + tokens[Tokens.SHIB_SURNAME]

    else:

        return HttpResponseBadRequest("Missing user name in request")

    affiliation = tokens.get(Tokens.SHIB_EP_AFFILIATION, '')

    email = tokens.get(Tokens.SHIB_MAIL, None)

    try:

        user = AstakosUser.objects.get(provider='shibboleth',

            third_party_identifier=eppn

        )

        if user.is_active:

            return prepare_response(request,

                                    user,

                                    request.GET.get('next'),

                                    'renew' in request.GET)

        else:

            message = _('Inactive account')

            messages.error(request, message)

            return render_response(on_login_template,

                                   login_form = LoginForm(request=request),

                                   context_instance=RequestContext(request))

    except AstakosUser.DoesNotExist, e:

        user = AstakosUser(third_party_identifier=eppn, realname=realname,

                           affiliation=affiliation, provider='shibboleth',

                           email=email)

        try:

            if not backend:

                backend = get_backend(request)

            form = backend.get_signup_form(provider='shibboleth', instance=user)

        except Exception, e:

            form = SimpleBackend(request).get_signup_form(

                provider='shibboleth',

                instance=user

            )

            messages.error(request, e)

        return render_response(on_creation_template,

            signup_form = form,

            provider = 'shibboleth',

            context_instance=get_context(

                request,

                extra_context

            )

        )