from django.shortcuts import redirect, render_to_response
from django.utils.translation import LANGUAGE_SESSION_KEY

from django.views.generic import TemplateView

# Create your views here.

class IndexView(TemplateView):
    template_name = "frontend/index.html"

def change_language(request):
    url = request.GET.get('url', '/')
    language = request.GET.get('language', 'de')
    if "://" in url:
        raise ValueError("This is not a de-referer.")
    request.session[LANGUAGE_SESSION_KEY] = language
    return redirect(url)

def errorhandler(request, exception, status):
    response = render_to_response("frontend/error.html", {"status_code": status})
    response.status_code = status
    return response

def handler404(request, exception):
    return errorhandler(request, exception, 404)

def handler500(request):
    return errorhandler(request, None, 500)