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path: root/objectapp/views/trackback.py
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# Copyright (c) 2011,  2012 Free Software Foundation

#     This program is free software: you can redistribute it and/or modify
#     it under the terms of the GNU Affero General Public License as
#     published by the Free Software Foundation, either version 3 of the
#     License, or (at your option) any later version.

#     This program is distributed in the hope that it will be useful,
#     but WITHOUT ANY WARRANTY; without even the implied warranty of
#     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#     GNU Affero General Public License for more details.

#     You should have received a copy of the GNU Affero General Public License
#     along with this program.  If not, see <http://www.gnu.org/licenses/>.


# This project incorporates work covered by the following copyright and permission notice:  

#    Copyright (c) 2009, Julien Fache
#    All rights reserved.

#    Redistribution and use in source and binary forms, with or without
#    modification, are permitted provided that the following conditions
#    are met:

#    * Redistributions of source code must retain the above copyright
#      notice, this list of conditions and the following disclaimer.
#    * Redistributions in binary form must reproduce the above copyright
#      notice, this list of conditions and the following disclaimer in
#      the documentation and/or other materials provided with the
#      distribution.
#    * Neither the name of the author nor the names of other
#      contributors may be used to endorse or promote products derived
#      from this software without specific prior written permission.

#    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
#    "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
#    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
#    FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
#    COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
#    INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
#    (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
#    SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
#    HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
#    STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
#    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
#    OF THE POSSIBILITY OF SUCH DAMAGE.

# Copyright (c) 2011,  2012 Free Software Foundation

#     This program is free software: you can redistribute it and/or modify
#     it under the terms of the GNU Affero General Public License as
#     published by the Free Software Foundation, either version 3 of the
#     License, or (at your option) any later version.

#     This program is distributed in the hope that it will be useful,
#     but WITHOUT ANY WARRANTY; without even the implied warranty of
#     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#     GNU Affero General Public License for more details.

#     You should have received a copy of the GNU Affero General Public License
#     along with this program.  If not, see <http://www.gnu.org/licenses/>.


"""Views for Objectapp trackback"""
from django.shortcuts import redirect
from django.shortcuts import get_object_or_404
from django.contrib.sites.models import Site
from django.contrib import comments
from django.views.decorators.csrf import csrf_exempt
from django.contrib.contenttypes.models import ContentType
from django.views.generic.simple import direct_to_template

from objectapp.models import Gbobject


@csrf_exempt
def gbobject_trackback(request, object_id):
    """Set a TrackBack for an Gbobject"""
    gbobject = get_object_or_404(Gbobject.published, pk=object_id)

    if request.POST.get('url'):
        error = ''
        url = request.POST['url']
        site = Site.objects.get_current()

        if not gbobject.pingback_enabled:
            error = u'Trackback is not enabled for %s' % gbobject.title

        title = request.POST.get('title') or url
        excerpt = request.POST.get('excerpt') or title
        blog_name = request.POST.get('blog_name') or title

        if not error:
            comment, created = comments.get_model().objects.get_or_create(
                content_type=ContentType.objects.get_for_model(Gbobject),
                object_pk=gbobject.pk, site=site, user_url=url,
                user_name=blog_name, defaults={'comment': excerpt})
            if created:
                user = gbobject.authors.all()[0]
                comment.flags.create(user=user, flag='trackback')
            else:
                error = u'Trackback is already registered'

        return direct_to_template(request, 'objectapp/gbobject_trackback.xml',
                                  mimetype='text/xml',
                                  extra_context={'error': error})

    return redirect(gbobject, permanent=True)