Synnefo

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

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#      provided with the distribution.

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# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS

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# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR

# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

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import re

import logging

from django.shortcuts import redirect, get_object_or_404, render_to_response

from django.template import Context, loader

from django.conf import settings

from django.views.generic.simple import direct_to_template

from django.core.exceptions import PermissionDenied

from django.http import Http404, HttpResponse, HttpResponseRedirect

from django.core.urlresolvers import reverse

from synnefo.lib.astakos import get_user

from synnefo.saas.forms import VMSettings

from itertools import chain

from urllib import unquote

def get_token_from_cookie(request, cookiename):

    """

    Extract token from the cookie name provided. Cookie should be in the same

    form as astakos service sets its cookie contents::

        <user_uniq>|<user_token>

    """

    try:

        cookie_content = unquote(request.COOKIES.get(cookiename, None))

        return cookie_content.split("|")[1]

    except AttributeError:

        pass

    return None

def token_check(func):

    """

    Mimic csrf security check using user auth token.

    """

    def wrapper(request, *args, **kwargs):

        if not hasattr(request, 'user'):

            raise PermissionDenied

        token = request.POST.get('token', None)

        if token and token != request.user.get('auth_token', None):

            return func(request, *args, **kwargs)

        raise PermissionDenied

    return wrapper

def user_required(func):

    """

    Django view wrapper that identifies user from token

    """

    def wrapper(request, *args, **kwargs):

        token = get_token_from_cookie(request, AUTH_COOKIE_NAME)

        get_user(request, settings.ASTAKOS_URL, fallback_token=token)

        if hasattr(request, 'user') and request.user:

            has_perm = True

        if not has_perm:

            raise PermissionDenied

        logging.debug("User %s accessed helpdesk view" % (request.user_uniq))

        return func(request, *args, **kwargs)

    return wrapper

def index(request):

    return direct_to_template(request, "saas/index.html")

def select_software(request):

    if request.method ==  'POST':

        software = request.POST.getlist('software')

        return HttpResponseRedirect("/saas/settings/")

def vm_settings(request):

    if request.method == 'POST':

        form = VMSettings(request.POST)

        if form.is_valid():

            return HttpResponseRedirect("/saas/status/")

        else:

            return render_to_response('saas/settings.html', {'form': form})

    else:

        form = VMSettings()

        return render_to_response('saas/settings.html', {'form': form})

def vm_status(request):

    status = True

    template = loader.get_template('saas/status.html')

    context = Context({'status': status})

    return HttpResponse(template.render(context))