#1 - Blog, views.py

views.py

from django.shortcuts import render
from django.views.generic import FormView
from .forms import AuthForm
from django.contrib.auth.decorators import login_required
from django.contrib import messages
from django.urls.base import reverse_lazy
from django.shortcuts import redirect


class AuthView(FormView):
    form_class = AuthForm
    template_name = "custom_auth/auth.html"
    success_url = reverse_lazy("custom_auth:success_view")

    def form_valid(self, form):
        status = form.check_and_authenticate(self.request)
        success_message = "Authentication occur successfully"
        error_message = "Invalid username or password provided"

        if status:
            messages.add_message(self.request, messages.SUCCESS, success_message)
        else:
            messages.add_message(self.request, messages.ERROR, error_message)
            return redirect("custom_auth:auth_view")

        return super().form_valid(form)

    def form_invalid(self, form):
        error_message = "validation error"
        messages.add_message(self.request, messages.ERROR, error_message)
        return super().form_valid(form)


@login_required
def success_view(request):
    return render(request, "custom_auth/success.html")