First working version

auth/admin.py

@@ -0,0 +1,3 @@
+from django.contrib import admin
+
+# Register your models here.

auth/apps.py

@@ -0,0 +1,6 @@
+from django.apps import AppConfig
+
+
+class AuthConfig(AppConfig):
+    default_auto_field = 'django.db.models.BigAutoField'
+    name = 'auth'

auth/forms.py

@@ -0,0 +1,11 @@
+from django import forms
+
+class LoginForm(forms.Form):
+    
+
+    username = forms.CharField(label="Username", max_length=100, required=True, strip=True,
+        widget=forms.TextInput(attrs={"class": "form-control"})
+        )
+    password = forms.CharField(label="Password", max_length=100, required=True, 
+        widget=forms.PasswordInput(attrs={"class": "form-control"})
+        )

auth/tests.py

@@ -0,0 +1,3 @@
+from django.test import TestCase
+
+# Create your tests here.

auth/urls.py

@@ -0,0 +1,8 @@
+from django.urls import path
+from . import views
+
+app_name = "auth"
+urlpatterns = [
+    path('login', views.LoginView.as_view(), name="login"),
+    path('logout', views.LogoutView.as_view(), name="logout"),
+]

auth/views.py

@@ -0,0 +1,51 @@
+from django.shortcuts import render
+from django.urls import reverse
+from django.http import HttpResponseRedirect
+from django.contrib.auth import authenticate, login, logout
+from django.views import generic
+
+from .forms import LoginForm
+
+class LoginView(generic.TemplateView):
+    template_name = "auth/login.html"
+
+    def get_context_data(self, **kwargs):
+        context = super().get_context_data(**kwargs)
+        context["form"] = LoginForm()
+        if "next" in self.request.GET:
+            context["next"] = self.request.GET["next"]
+        return context
+
+    def get(self, request, *args, **kwargs):
+        if request.user.is_authenticated:
+            return HttpResponseRedirect(request.GET.get("next","/"))
+        context = self.get_context_data(**kwargs)
+        return self.render_to_response(context)
+    
+    def post(self, request, *args, **kwargs):
+        if request.user.is_authenticated:
+            return HttpResponseRedirect(request.POST.get("next","/"))
+        form = LoginForm(request.POST)
+        if not form.is_valid():
+            return HttpResponseRedirect(reverse("auth:login"))
+        user = authenticate(request, username=form.cleaned_data["username"], password=form.cleaned_data["password"])
+        if user is not None:
+            login(request, user)
+            return HttpResponseRedirect(request.GET.get("next", "/"))
+        else:
+            return HttpResponseRedirect(reverse("auth:login"))
+
+class LogoutView(generic.RedirectView):
+
+    def get_redirect_url(self):
+        return self.request.GET.get("next", "/")
+
+    def get(self, request, *args, **kwargs):
+        logout(request)
+        return super().get(request, *args, **kwargs)
+
+def logout_view(request):
+
+    logout(request)
+    redirect_to = request.GET.get("redirect_to", "/")
+    return HttpResponseRedirect(redirect_to)