Adding new To Do app

1. Authentication -  uses django auth User for new
user registration and login.
2. Items - uses sqllite3 to perform CRUD operation
on users tasks/notes.
3. Temaplates - contaions html files

Author: HARSH-PRANJAL

To-Do_app/Pipfile

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+[[source]]
+url = "https://pypi.org/simple"
+verify_ssl = true
+name = "pypi"
+
+[packages]
+django = "*"
+
+[dev-packages]
+
+[requires]
+python_version = "3.10"

To-Do_app/Pipfile.lock

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+from django.contrib import admin
+
+# Register your models here.

To-Do_app/ToDo_app/Authentication/__init__.py

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+from django.apps import AppConfig
+
+
+class AuthenticationConfig(AppConfig):
+    default_auto_field = 'django.db.models.BigAutoField'
+    name = 'Authentication'

To-Do_app/ToDo_app/Authentication/admin.py

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+from django.db import models
+
+# Create your models here.

To-Do_app/ToDo_app/Authentication/apps.py

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+from django.test import TestCase
+
+# Create your tests here.

To-Do_app/ToDo_app/Authentication/migrations/__init__.py

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+from django.urls import path
+from .views import (
+    RegistrationView,
+    UserLoginView,
+    UserLogoutView,
+)
+
+urlpatterns = [
+    # django always checks for cross site forgery so we add csrf_exempt to let other sites send reuest to this url
+    path("registration", RegistrationView.as_view(), name="registration"),
+    path("userlogin", UserLoginView.as_view(), name="login"),
+    path("userlogout", UserLogoutView.as_view(), name="logout"),
+]

To-Do_app/ToDo_app/Authentication/models.py

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+import json
+from django.shortcuts import render, redirect
+from django.views import View
+from django.http import JsonResponse
+from django.contrib.auth.models import User
+from django.db import transaction
+from django.contrib import messages
+from django.contrib.auth import login, logout, authenticate
+
+
+# Create your views here.
+class RegistrationView(View):
+    def get(self, request):
+        messages.get_messages(request)
+        return render(request, "authentication/register.html")
+
+    def post(self, request):
+
+        # get user data
+        data = request.POST
+        username = data.get("username")
+        email = data.get("email")
+        password = data.get("password")
+
+        context = {"fieldValues": request.POST}
+
+        # validate
+        if not User.objects.filter(username=username).exists():
+            if not User.objects.filter(email=email).exists():
+                if len(password) < 8:
+                    messages.error(request, "Password should be 8 charecter long")
+                    return render(request, "authentication/register.html", context)
+                else:
+                    # new nuser creation process
+                    try:
+                        # adding user to data base
+                        user = User.objects.create_user(username=username, email=email)
+                        user.set_password(password)
+                        user.save()
+                        transaction.commit()
+                        messages.success(request, "Account created")
+                    except Exception as e:
+                        messages.error(request, f"Server - Database warning {str(e)}")
+                        transaction.rollback()
+            else:
+                messages.error(request, "Email already exists")
+                return render(request, "authentication/register.html", context)
+        else:
+            messages.error(request, "User name already exists")
+            return render(request, "authentication/register.html", context)
+
+        return redirect("login")
+
+
+class UserLoginView(View):
+    def get(self, request):
+        return render(request, "authentication/login.html")
+
+    def post(self, request):
+        data = request.POST
+        username = data.get("username")
+        password = data.get("password")
+
+        if username and password:
+            user = authenticate(username=username, password=password)
+            if user:
+                if user.is_active:
+                    login(request, user)
+                    messages.success(request, "Logged in successfully.")
+                    return redirect("index")  # Redirect to the expenses page
+                else:
+                    messages.error(request, "Your account is not active.")
+            else:
+                messages.error(request, "Invalid username or password.")
+        else:
+            messages.error(request, "Please provide both username and password.")
+
+        return redirect("login")
+
+
+class UserLogoutView(View):
+    def get(self, request):
+        logout(request)
+        messages.success(request, "Logout successfully.")
+        return redirect("login")