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# Copyright (c) 2006-2007, Jared Kuolt
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from django.conf import settings
from django.contrib.auth.views import login
from django.http import HttpResponseRedirect
import re
import threading

class RequireLoginMiddleware(object):
    """
    Require Login middleware. If enabled, each Django-powered page will
    require authentication.
    
    If an anonymous user requests a page, he/she is redirected to the login
    page set by LOGIN_URL.
    """
    def __init__(self):
        self.exceptionre = re.compile("(^/media/)|(^/robots.txt)|(^/login/)")
    
    def process_request(self, request):
        if request.user.is_anonymous() and not self.exceptionre.search(request.path):
            if request.POST:
                return login(request)
            else:
                return HttpResponseRedirect('%s?next=%s' % (settings.LOGIN_URL, request.path))


user_holder = threading.local()
user_holder.user = None

class AutoUserMiddleware(object):
    '''Saves the current user so it can be retrieved by the admin'''
    def process_request(self, request):
        user_holder.user = request.user


def get_user():
    '''Get the currently logged in request.user'''
    return user_holder.user