OpenSlides/openslides/utils/utils.py

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#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
openslides.utils.urls
~~~~~~~~~~~~~~~~~~~~~
URL list for utils.
:copyright: 2011 by the OpenSlides team, see AUTHORS.
:license: GNU GPL, see LICENSE for more details.
"""
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try:
import json
except ImportError:
import simplejson as json
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from django.shortcuts import render_to_response, redirect
from django.core.urlresolvers import reverse
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from django.http import HttpResponse, HttpResponseForbidden
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from django.template import RequestContext
from django.template.loader import render_to_string
from django.core.context_processors import csrf
from django.contrib import messages
from django.contrib.auth.models import Permission
from django.utils.translation import ugettext as _
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from openslides.utils.signals import template_manipulation
from openslides import get_version
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def revision(request):
return {'openslides_version': get_version()}
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def gen_confirm_form(request, message, url):
messages.warning(request, '%s<form action="%s" method="post"><input type="hidden" value="%s" name="csrfmiddlewaretoken"><input type="submit" value="%s" /> <input type="button" value="%s"></form>' % (message, url, csrf(request)['csrf_token'], _("Yes"), _("No")))
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def del_confirm_form(request, object, name=None, delete_link=None):
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if name is None:
name = object
if delete_link is None:
delete_link = object.get_absolute_url('delete')
gen_confirm_form(request, _('Do you really want to delete <b>%s</b>?') % name, delete_link)
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def render_response(req, *args, **kwargs):
kwargs['context_instance'] = RequestContext(req)
return render_to_response(*args, **kwargs)
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def template(template_name):
def renderer(func):
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def wrapper(request, *args, **kwargs):
output = func(request, *args, **kwargs)
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if not isinstance(output, dict):
return output
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context = {}
template_manipulation.send(sender='utils_template', request=request, context=context)
output.update(context)
response = render_to_response(template_name, output, context_instance=RequestContext(request))
if 'cookie' in output:
response.set_cookie(output['cookie'][0], output['cookie'][1])
return response
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return wrapper
return renderer
def permission_required(perm, login_url=None):
"""
Decorator for views that checks whether a user has a particular permission
enabled, redirecting to the log-in page if necessary.
"""
def renderer(func):
def wrapper(request, *args, **kw):
if request.user.has_perm(perm):
return func(request, *args, **kw)
if request.user.is_authenticated():
return render_to_forbitten(request)
return redirect(reverse('user_login'))
return wrapper
return renderer
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def render_to_forbitten(request, error=_("Sorry, you have no rights to see this page.")):
return HttpResponseForbidden(render_to_string('403.html', {'error': error}, context_instance=RequestContext(request)))
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def delete_default_permissions():
for p in Permission.objects.all():
if p.codename.startswith('add') or p.codename.startswith('delete') or p.codename.startswith('change'):
p.delete()
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def ajax_request(data):
"""
generates a HTTPResponse-Object with json-Data for a
ajax response
"""
return HttpResponse(json.dumps(data))
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def _propper_unicode(text):
res = ''
if not isinstance(text, unicode):
res = u"%s" % text.decode('UTF-8')
else:
res = text
return res