class LoginForm(forms.Form):
  username = forms.CharField(max_length=255, required=True)
  password = forms.CharField(widget=forms.PasswordInput, required=True)

  def clean(self):
      username = self.cleaned_data.get('username')
      password = self.cleaned_data.get('password')
      user     = authenticate(username=username, password=password)
      if not user or not user.is_active:
          raise forms.ValidationError("Sorry, that login was invalid. Please try again.")
      return self.cleaned_data

  def login(self, request):
      username = self.cleaned_data.get('username')
      password = self.cleaned_data.get('password')
      user     = authenticate(username=username, password=password)
      return user

class Login(generic.FormView):
  template_name = "painel/login.html"
  form_class    = LoginForm
  success_url   = reverse_lazy("index")

  def form_valid(self, form):
      login(self.request, form.login(self.request))
      return HttpResponseRedirect(self.get_success_url())

  def get_success_url(self):
      return self.success_url