def login_view(request):
    message = None
    if "error_message" in request.session:
        message = request.session["error_message"]
    fb_url = 'https://graph.facebook.com/oauth/authorize' \
             '?client_id=%s' \
             '&redirect_uri=%s' \
             '&scope=email' \
             '&state=d7IEpfKcWwfmJCwdNVUsA6vLIsu3IWr0' \
             % (CLIENT_ID,
                FULL_DOMAIN + FACEBOOK_REDIRECT_URL)
    if request.method == "POST":
        if User.objects.filter(username=request.POST.get("email")).exists():
            user = get_object_or_404(User, username=request.POST.get("email"))
            user_profile = get_object_or_404(UserProfile, user=user)
            if user.check_password(request.POST.get("password")):
                if not user_profile.confirm:
                    request.session["error_message"] = "Please wait until your account will be confirmed!"
                    return HttpResponseRedirect(reverse("login_view"))
                else:
                    request.session["error_message"] = None
                    auth_user = authenticate(username=request.POST.get("email"),
                                             password=request.POST.get("password"))
                    login(request, auth_user)
                    return HttpResponseRedirect(reverse("profile"))
            else:
                request.session["error_message"] = "Incorrect password!"
                return HttpResponseRedirect(reverse("login_view"))
        else:
            request.session["error_message"] = "Incorrect email!"
            return HttpResponseRedirect(reverse("login_view"))
    return render(request, "login.html", {"fb_url": fb_url,
                                          "message": message})