feat: create auth app with login, logout, and auth check, including custom backend for email login

auth_app/admin.py

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

auth_app/apps.py

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

auth_app/custom_backend.py

@@ -0,0 +1,12 @@
+from user_app.models import User
+from django.contrib.auth.backends import BaseBackend
+
+class EmailBackend(BaseBackend):
+    def authenticate(self, request, email=None, password=None):
+        try:
+            user = User.objects.get(email=email)
+            if user.check_password(password):
+                return user
+            return None
+        except User.DoesNotExist:
+            return None

auth_app/models.py

@@ -0,0 +1,3 @@
+from django.db import models
+
+# Create your models here.

auth_app/serializer.py

@@ -0,0 +1,17 @@
+from rest_framework import serializers
+
+class LoginSerializer(serializers.Serializer):
+    email = serializers.EmailField()
+    password = serializers.CharField(write_only=True)
+
+    def validate(self, data):
+        email = data.get('email')
+        password = data.get('password')
+        
+        if not email:
+            raise serializers.ValidationError("Email is required.")
+        
+        if not password:
+            raise serializers.ValidationError("Password is required.")
+        
+        return data

auth_app/tests.py

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

auth_app/views.py

@@ -0,0 +1,52 @@
+from django.shortcuts import render, redirect
+from rest_framework.views import APIView
+from rest_framework.response import Response
+from rest_framework import status, authentication
+from rest_framework.authtoken.models import Token
+from rest_framework.authtoken.views import ObtainAuthToken
+from django.contrib.auth import authenticate
+from .serializer import LoginSerializer
+from rest_framework.permissions import IsAuthenticated
+
+class LoginView(APIView):
+    serializer_class = LoginSerializer
+
+    def post(self, request):
+        serializer = self.serializer_class(data=request.data)
+        
+        if serializer.is_valid():
+            email = serializer.validated_data['email']
+            password = serializer.validated_data['password']
+            user = authenticate(request, email=email, password=password)
+            
+            if user:
+                if not user.is_active:
+                    return Response({'error': 'Account is inactive, please check your mails'}, status=status.HTTP_403_FORBIDDEN)
+                return self._create_token_response(user)
+            return Response({'error': 'Unable to login with provided credentials.'}, status=status.HTTP_401_UNAUTHORIZED)
+          
+        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
+
+    def _create_token_response(self, user):
+        token, created = Token.objects.get_or_create(user=user)
+        return Response({'token': token.key}, status=status.HTTP_200_OK)
+
+class LogoutView(APIView):
+    authentication_classes = [authentication.TokenAuthentication]
+    permission_classes = [IsAuthenticated]
+
+    def post(self, request):
+        try:
+            request.user.auth_token.delete()
+            return Response({"message": "Successfully logged out"}, status=status.HTTP_200_OK)
+        except Exception as e:
+            return Response({"error": "Logout failed"}, status=status.HTTP_400_BAD_REQUEST)
+
+class AuthView(APIView):
+    authentication_classes = [authentication.TokenAuthentication]
+
+    def get(self, request):
+        if request.user.is_authenticated:
+            return Response({"user_id": request.user.id}, status=status.HTTP_200_OK)
+        return Response({"error": "User is not logged in"}, status=status.HTTP_401_UNAUTHORIZED)
+

join/settings.py

@@ -55,10 +55,12 @@ INSTALLED_APPS = [
     'django.contrib.messages',
     'django.contrib.staticfiles',
     'rest_framework',
+    'rest_framework.authtoken',
     'corsheaders',
     'djangorestframework_camel_case',
     'task_app',
     'user_app',
+    'auth_app',
 ]
 
 MIDDLEWARE = [
@@ -163,3 +165,21 @@ STATIC_URL = 'static/'
 # https://docs.djangoproject.com/en/5.1/ref/settings/#default-auto-field
 
 DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'
+
+
+# Auth
+
+AUTH_USER_MODEL = 'user_app.User'
+AUTH_EMAIL_VERIFICATION = True
+
+# Rest Framework
+REST_FRAMEWORK = {
+    'DEFAULT_AUTHENTICATION_CLASSES': [
+        'rest_framework.authentication.TokenAuthentication',
+    ],
+}
+
+AUTHENTICATION_BACKENDS = (
+    'auth_app.custom_backend.EmailBackend',
+    'django.contrib.auth.backends.ModelBackend',
+)

join/urls.py

@@ -3,6 +3,7 @@ from django.urls import path, include
 from rest_framework.routers import DefaultRouter
 from task_app.views import TaskViewSet, SubTaskViewSet, AssignedTaskViewSet
 from user_app.views import UserViewSet
+from auth_app.views import LoginView, LogoutView, AuthView
 
 router = DefaultRouter()
 router.register(r'tasks', TaskViewSet)
@@ -13,4 +14,8 @@ router.register(r'users', UserViewSet)
 urlpatterns = [
     path('admin/', admin.site.urls),
     path('api/', include(router.urls)),
+    
+    path('auth/', AuthView.as_view(), name='auth'),
+    path('auth/login/', LoginView.as_view(), name='login'),
+    path('auth/logout/', LogoutView.as_view(), name='logout'),
 ]

user_app/admin.py

@@ -1,4 +1,5 @@
 from django.contrib import admin
+from django import forms
 from .models import User
 
 class UserAdmin(admin.ModelAdmin):
@@ -9,7 +10,7 @@ class UserAdmin(admin.ModelAdmin):
 
     fieldsets = (
         (None, {
-            'fields': ('first_name', 'last_name', 'email', 'phone', 'password')
+            'fields': ('first_name', 'last_name', 'email', 'phone', 'password') #Passwort hier beibehalten.
         }),
         ('Additional Info', {
             'fields': ('initials', 'color', 'status', 'last_login')
@@ -22,4 +23,9 @@ class UserAdmin(admin.ModelAdmin):
     list_editable = ('is_active', 'is_staff', 'status')
     ordering = ('last_name',)
 
+    def save_model(self, request, obj, form, change):
+        if 'password' in form.changed_data:
+            obj.set_password(form.cleaned_data['password'])
+        super().save_model(request, obj, form, change)
+
 admin.site.register(User, UserAdmin)