## $Id: language.py 7811 2012-03-08 19:00:51Z uli $
##
## Copyright (C) 2012 Uli Fouquet & Henrik Bettermann
## This program is free software; you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published by
## the Free Software Foundation; either version 2 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 General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with this program; if not, write to the Free Software
## Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
##

import grokcore.component
from zope.component import getUtility
from zope.publisher.interfaces.browser import IBrowserRequest
from zope.i18n.interfaces import IUserPreferredLanguages
from waeup.kofa.configuration import ConfigurationContainer
from waeup.kofa.interfaces import IKOFAUtils

class KOFALanguage(grokcore.component.Adapter):
    """Set preferred languages"""
    grokcore.component.context(IBrowserRequest)
    grokcore.component.implements(IUserPreferredLanguages)

    def getPreferredLanguages(self):
        portal_language = getUtility(IKOFAUtils).PORTAL_LANGUAGE

        # This an adapter for the request, so self.context is the request.
        request = self.context

        # Extract the preferred language from a cookie:
        lang = request.cookies.get('kofa.language', portal_language)

        # According to IUserPreferredLanguages, we must return a list.
        return [lang]