OpenSlides/openslides/config/models.py

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#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
openslides.config.models
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~~~~~~~~~~~~~~~~~~~~~~~~
Models for the config app.
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:copyright: 2011, 2012 by OpenSlides team, see AUTHORS.
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:license: GNU GPL, see LICENSE for more details.
"""
from pickle import dumps, loads
import base64
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from django.db import models
from django.dispatch import receiver
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from utils.translation_ext import ugettext as _
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from openslides.config.signals import default_config_value
import settings
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class ConfigStore(models.Model):
key = models.CharField(max_length=100, primary_key=True)
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value = models.CharField(max_length=100)
def __unicode__(self):
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return self.key
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class Meta:
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verbose_name = 'config'
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permissions = (
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('can_manage_config', _("Can manage configuration", fixstr=True)),
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)
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# TODO:
# I used base64 to save pickled Data, there has to be another way see:
# http://stackoverflow.com/questions/2524970/djangounicodedecodeerror-while-storing-pickled-data
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class Config(object):
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def load_config(self):
self.config = {}
for key, value in ConfigStore.objects.all().values_list():
self.config[key] = loads(base64.decodestring(str(value)))
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def __getitem__(self, key):
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# Had to be deactivated, because in more than one thread the values have
# to be loaded on each request.
## try:
## self.config
## except AttributeError:
## self.load_config()
## try:
## return self.config[key]
## except KeyError:
## pass
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try:
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return loads(base64(str(ConfigStore.objects.get(key=key).value)))
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except ConfigStore.DoesNotExist:
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pass
for receiver, value in default_config_value.send(sender='config', key=key):
if value is not None:
# if settings.DEBUG:
# print 'Using default for %s' % key
return value
if settings.DEBUG:
print "No default value for: %s" % key
return None
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def __setitem__(self, key, value):
try:
c = ConfigStore.objects.get(pk=key)
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except ConfigStore.DoesNotExist:
c = ConfigStore(pk=key)
c.value = base64.encodestring(dumps(value))
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c.save()
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try:
self.config[key] = value
except AttributeError:
self.load_config()
self.config[key] = value
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config = Config()
@receiver(default_config_value, dispatch_uid="config_default_config")
def default_config(sender, key, **kwargs):
return {
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'event_name': 'OpenSlides',
'event_description': _('Presentation system for agenda, applications and elections'),
'event_date': '',
'event_location': '',
'event_organizer': '',
'presentation': '',
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'frontpage_title': _('Welcome'),
'frontpage_welcometext': _('Welcome to OpenSlides!'),
'show_help_text': True,
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'help_text': _("Get professional support for OpenSlides on <a href='http://openslides.org/' target='_blank'>www.openslides.org</a>."),
'system_enable_anonymous': False,
}.get(key)
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from django.dispatch import receiver
from django.core.urlresolvers import reverse
from django.utils.importlib import import_module
import settings
from openslides.utils.signals import template_manipulation
@receiver(template_manipulation, dispatch_uid="config_submenu")
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def set_submenu(sender, request, context, **kwargs):
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if not request.path.startswith('/config/'):
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return None
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menu_links = [
(reverse('config_general'), _('General'), request.path == reverse('config_general') ),
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]
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for app in settings.INSTALLED_APPS:
try:
mod = import_module(app)
views = mod.views
views.Config
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except (ImportError, AttributeError):
continue
appname = mod.__name__.split('.')[0]
selected = reverse('config_%s' % appname) == request.path
try:
title = mod.NAME
except AttributeError:
title = appname.title()
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menu_links.append(
(reverse('config_%s' % appname), _(title), selected)
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)
menu_links.append (
(reverse('config_version'), _('Version'), request.path == reverse('config_version') )
)
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context.update({
'menu_links': menu_links,
})