Create Language select from django-constance config by new opds_catalog.middeleware

from opds_catalog.models import Book, Catalog, Author, Genre, Series, bookshelf, Counter, lang_menu

from opds_catalog import models

from opds_catalog import settings

from opds_catalog.opds_middleware import BasicAuthMiddleware

from opds_catalog.middleware import BasicAuthMiddleware

from opds_catalog.opds_paginator import Paginator as OPDS_Paginator

from constance import config

from django.contrib import auth

from django.core.exceptions import ImproperlyConfigured

from django.core.urlresolvers import resolve

from django.utils import translation

#from opds_catalog import settings

from constance import config

class BasicAuthMiddleware(object):

    header = "HTTP_AUTHORIZATION"

            return None

        return self.unauthed()

class SOPDSLocaleMiddleware:

    def process_request(self, request):

            request.LANG = config.SOPDS_LANGUAGE

            translation.activate(request.LANG)

            request.LANGUAGE_CODE = request.LANG

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import logging

import os

from django.conf import settings

from django.utils import translation

from constance import config

loglevels={'debug':logging.DEBUG,'info':logging.INFO,'warning':logging.WARNING,'error':logging.ERROR,'critical':logging.CRITICAL,'none':logging.NOTSET}

else:

    LOGLEVEL=logging.NOTSET

from django.dispatch import receiver

#from constance.signals import config_updated

#

#@receiver(config_updated)

#def constance_updated(sender, updated_key, new_value, **kwargs):

#    if updated_key == 'SOPDS_LANGUAGE':

#        translation.activate(new_value)

#        print(new_value)

def constance_update_all():

    pass

# Переопределяем некоторые функции для SQLite, которые работают неправлено

from django.db.backends.signals import connection_created

from django.dispatch import receiver

def sopds_upper(s):

    return s.upper()

    'django.middleware.csrf.CsrfViewMiddleware',

    'django.contrib.auth.middleware.AuthenticationMiddleware',    

    'django.contrib.auth.middleware.SessionAuthenticationMiddleware',   

    #'opds_catalog.opds_middleware.BasicAuthMiddleware',  

    'opds_catalog.middleware.SOPDSLocaleMiddleware',

    'django.contrib.messages.middleware.MessageMiddleware',

    'django.middleware.clickjacking.XFrameOptionsMiddleware',

]

# Internationalization

# https://docs.djangoproject.com/en/1.9/topics/i18n/

LANGUAGE_CODE = 'en-US'

#LANGUAGE_CODE = 'en-US'

#LANGUAGE_CODE = 'ru-RU'

LOCALE_PATHS = (

CONSTANCE_BACKEND = 'constance.backends.database.DatabaseBackend'

CONSTANCE_ADDITIONAL_FIELDS = {

    'language_select': ['django.forms.fields.ChoiceField', {

        'widget': 'django.forms.Select',

        'choices': (("ru-RU", "Russian"), ("en-US", "English"))

    }],

}

CONSTANCE_CONFIG = OrderedDict([

    ('SOPDS_LANGUAGE', ('en-US',_('Select language'),'language_select')),    

    ('SOPDS_ROOT_LIB', ('books/',_('Absolute path to books collection directory'))),

    ('SOPDS_BOOK_EXTENSIONS', ('.pdf .djvu .fb2 .epub', _('List of managed book files extensions'))),

    ('SOPDS_SCAN_START_DIRECTLY', (False,_('Turn once scanning directly'))),

])

CONSTANCE_CONFIG_FIELDSETS = {

    '1. General Options': ('SOPDS_ROOT_LIB', 'SOPDS_BOOK_EXTENSIONS','SOPDS_SCAN_START_DIRECTLY'),

    '1. General Options': ('SOPDS_LANGUAGE', 'SOPDS_ROOT_LIB', 'SOPDS_BOOK_EXTENSIONS','SOPDS_SCAN_START_DIRECTLY'),

    '2. Server Options': ('SOPDS_AUTH', 'SOPDS_ALPHABET_MENU', 'SOPDS_DOUBLES_HIDE', 'SOPDS_COVER_SHOW', 'SOPDS_SPLITITEMS', 'SOPDS_MAXITEMS', 'SOPDS_TITLE_AS_FILENAME', 'SOPDS_NOCOVER_PATH'),    

    '3. Scanner Options': ('SOPDS_FB2PARSE','SOPDS_ZIPSCAN','SOPDS_ZIPCODEPAGE', 'SOPDS_INPX_ENABLE', 'SOPDS_INPX_SKIP_UNCHANGED', 'SOPDS_INPX_TEST_ZIP', 'SOPDS_INPX_TEST_FILES', 'SOPDS_DELETE_LOGICAL'),

    '4. Scanner Shedule': ('SOPDS_SCAN_SHED_MIN', 'SOPDS_SCAN_SHED_HOUR', 'SOPDS_SCAN_SHED_DAY','SOPDS_SCAN_SHED_DOW'),