Base

chat/ChatApp/ChatApp/asgi.py

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+"""
+ASGI config for ChatApp project.
+
+It exposes the ASGI callable as a module-level variable named ``application``.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/4.2/howto/deployment/asgi/
+"""
+
+import os
+from channels.routing import ProtocolTypeRouter, URLRouter
+from django.core.asgi import get_asgi_application
+from channels.auth import AuthMiddlewareStack
+
+os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'ChatApp.settings')
+
+asgi_app = get_asgi_application()
+
+
+from chat import routing
+
+application = ProtocolTypeRouter(
+    {
+        "http" : asgi_app, 
+        "websocket" : AuthMiddlewareStack(
+            URLRouter(
+                routing.websocket_urlpatterns
+            )    
+        )
+    }
+)
+
+ASGI_APPLICATION = 'ChatApp.asgi.application'

chat/ChatApp/ChatApp/settings.py

@@ -0,0 +1,176 @@
+"""
+Django settings for ChatApp project.
+
+Generated by 'django-admin startproject' using Django 4.2.13.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/4.2/topics/settings/
+
+For the full list of settings and their values, see
+https://docs.djangoproject.com/en/4.2/ref/settings/
+"""
+
+import sys
+from pathlib import Path
+import environ
+
+env = environ.Env()
+sys.path.append('/home/archive/user_auth_system')
+
+SECRET_KEY_ENV = env('SECRET_KEY_USER')
+
+# Build paths inside the project like this: BASE_DIR / 'subdir'.
+BASE_DIR = Path(__file__).resolve().parent.parent
+
+
+# Quick-start development settings - unsuitable for production
+# See https://docs.djangoproject.com/en/4.2/howto/deployment/checklist/
+
+# SECURITY WARNING: keep the secret key used in production secret!
+SECRET_KEY = SECRET_KEY_ENV
+
+# SECURITY WARNING: don't run with debug turned on in production!
+DEBUG = False
+IP_ADDRESS= env('IP_ADDRESS')
+DB_NAME = env('DB_ARCHIVE_NAME')
+DB_USER = env('DB_ARCHIVE_USER')
+DB_PASSWORD = env('DB_ARCHIVE_PASSWORD')
+DB_HOST = env('DB_ARCHIVE_HOST')
+DB_PORT = env('DB_ARCHIVE_PORT')
+
+ALLOWED_HOSTS = ['*']
+
+
+# Application definition
+
+INSTALLED_APPS = [
+    'chat.apps.ChatConfig',
+    'django.contrib.admin',
+    'django.contrib.auth',
+    'django.contrib.contenttypes',
+    'django.contrib.sessions',
+    'django.contrib.messages',
+    'daphne',
+    'django.contrib.staticfiles',
+    'channels',
+    'corsheaders',
+	'user_management'
+]
+
+MIDDLEWARE = [
+    'django.middleware.security.SecurityMiddleware',
+    'django.contrib.sessions.middleware.SessionMiddleware',
+    'corsheaders.middleware.CorsMiddleware',
+    'django.middleware.common.CommonMiddleware',
+    'django.middleware.csrf.CsrfViewMiddleware',
+    'django.contrib.auth.middleware.AuthenticationMiddleware',
+    'django.contrib.messages.middleware.MessageMiddleware',
+    'django.middleware.clickjacking.XFrameOptionsMiddleware',
+]
+
+ROOT_URLCONF = 'ChatApp.urls'
+
+TEMPLATES = [
+    {
+        'BACKEND': 'django.template.backends.django.DjangoTemplates',
+        'DIRS': [],
+        'APP_DIRS': True,
+        'OPTIONS': {
+            'context_processors': [
+                'django.template.context_processors.debug',
+                'django.template.context_processors.request',
+                'django.contrib.auth.context_processors.auth',
+                'django.contrib.messages.context_processors.messages',
+            ],
+        },
+    },
+]
+
+WSGI_APPLICATION = 'ChatApp.wsgi.application'
+ASGI_APPLICATION = 'ChatApp.asgi.application'
+
+
+# Database
+# https://docs.djangoproject.com/en/4.2/ref/settings/#databases
+DATABASES = {
+    'default': {
+        'ENGINE': 'django.db.backends.postgresql',
+        'NAME': DB_NAME,
+        'USER': DB_USER,
+        'PASSWORD': DB_PASSWORD,
+        'HOST': DB_HOST,
+        'PORT': DB_PORT,
+    }
+}
+
+
+# Password validation
+# https://docs.djangoproject.com/en/4.2/ref/settings/#auth-password-validators
+
+AUTH_PASSWORD_VALIDATORS = [
+    {
+        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
+    },
+    {
+        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
+    },
+    {
+        'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
+    },
+    {
+        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
+    },
+]
+
+
+# Internationalization
+# https://docs.djangoproject.com/en/4.2/topics/i18n/
+
+LANGUAGE_CODE = 'en-us'
+
+TIME_ZONE = 'UTC'
+
+USE_I18N = True
+
+USE_TZ = True
+
+
+# Static files (CSS, JavaScript, Images)
+# https://docs.djangoproject.com/en/4.2/howto/static-files/
+
+STATIC_URL = 'static/'
+
+# Default primary key field type
+# https://docs.djangoproject.com/en/4.2/ref/settings/#default-auto-field
+
+DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'
+
+CHANNEL_LAYERS = {
+    "default": {
+        "BACKEND": "channels_redis.core.RedisChannelLayer",
+         'CONFIG': {
+            "hosts": [('redis', 6379)],
+        },
+    },
+}
+
+LOGIN_REDIRECT_URL = "room"
+
+SESSION_ENGINE = 'django.contrib.sessions.backends.db'
+SESSION_COOKIE_NAME = 'sessionid'
+SESSION_COOKIE_HTTPONLY = True
+SESSION_COOKIE_SAMESITE = 'Lax'
+SESSION_COOKIE_SECURE = True
+
+CSRF_COOKIE_NAME = 'csrftoken'
+CSRF_COOKIE_HTTPONLY = True
+CSRF_COOKIE_SAMESITE = 'None'
+CSRF_COOKIE_SECURE = True
+
+CORS_ALLOW_CREDENTIALS = True
+CORS_ALLOW_ALL_ORIGINS = True
+
+CSRF_TRUSTED_ORIGINS = ['https://localhost', 'https://' + IP_ADDRESS]
+
+# Connexion to CustomUser
+AUTH_USER_MODEL = 'user_management.CustomUser'

chat/ChatApp/ChatApp/urls.py

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+"""
+URL configuration for ChatApp project.
+
+The `urlpatterns` list routes URLs to views. For more information please see:
+    https://docs.djangoproject.com/en/4.2/topics/http/urls/
+Examples:
+Function views
+    1. Add an import:  from my_app import views
+    2. Add a URL to urlpatterns:  path('', views.home, name='home')
+Class-based views
+    1. Add an import:  from other_app.views import Home
+    2. Add a URL to urlpatterns:  path('', Home.as_view(), name='home')
+Including another URLconf
+    1. Import the include() function: from django.urls import include, path
+    2. Add a URL to urlpatterns:  path('blog/', include('blog.urls'))
+"""
+from django.contrib import admin
+from django.urls import path, include
+
+urlpatterns = [
+    path('admin/', admin.site.urls),
+    path("", include("chat.urls")),
+]

chat/ChatApp/ChatApp/wsgi.py

@@ -0,0 +1,16 @@
+"""
+WSGI config for ChatApp project.
+
+It exposes the WSGI callable as a module-level variable named ``application``.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/4.2/howto/deployment/wsgi/
+"""
+
+import os
+
+from django.core.wsgi import get_wsgi_application
+
+os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'ChatApp.settings')
+
+application = get_wsgi_application()

chat/ChatApp/chat/admin.py

@@ -0,0 +1,5 @@
+from django.contrib import admin
+from .models import *
+
+# Register your models here.
+# admin.site.register(User) #?? I don't need this user

chat/ChatApp/chat/apps.py

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

chat/ChatApp/chat/consumers.py

@@ -0,0 +1,49 @@
+import json
+from channels.generic.websocket import AsyncWebsocketConsumer
+from channels.db import database_sync_to_async
+from .models import ChatMessage, ChatRoom
+
+class ChatConsumer(AsyncWebsocketConsumer):
+    @database_sync_to_async
+    def create_chat(self, room_name, message, username):
+        return ChatMessage.objects.create(room_name=room_name, message=message, username=username)
+    
+    async def connect(self):
+        self.user = self.scope['user'] 
+        self.room_name = self.scope['url_route']['kwargs']['room_name']
+        self.room_group_name = f"chat_{self.room_name}"
+
+        await self.channel_layer.group_add(
+            self.room_group_name,
+            self.channel_name
+        )
+        await self.accept()
+
+    async def disconnect(self , close_code):
+        await self.channel_layer.group_discard(
+            self.room_group_name, 
+            self.channel_name
+        )
+    async def receive(self, text_data):
+        text_data_json = json.loads(text_data)
+        message = text_data_json["message"]
+        username = text_data_json["username"]
+        
+        room = await self.get_room_instance(self.room_name)
+        await self.create_chat(room, message, username)
+        await self.channel_layer.group_send(
+            self.room_group_name,{
+                "type" : "sendMessage",
+                "message" : message, 
+                "username" : username,
+            })
+        
+    async def sendMessage(self, event) :
+        message = event["message"]
+        username = event["username"]
+
+        await self.send(text_data = json.dumps({"message" : message ,"username" : username}))
+      
+    @database_sync_to_async
+    def get_room_instance(self, room_name):
+        return ChatRoom.objects.get(room_name=room_name)    

chat/ChatApp/chat/forms.py

@@ -0,0 +1,7 @@
+from django.contrib.auth.forms import UserCreationForm
+from django.contrib.auth.models import User
+
+class SignUpForm(UserCreationForm):
+    class Meta:
+        model = User
+        fields = ['username', 'password1', 'password2']

chat/ChatApp/chat/models.py

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+from django.db import models
+from django.conf import settings
+
+class ChatRoom(models.Model):
+    room_name = models.CharField(max_length=255, unique=True, default='default')
+    user1 = models.ForeignKey(settings.AUTH_USER_MODEL, related_name='user1', on_delete=models.CASCADE)
+    user2 = models.ForeignKey(settings.AUTH_USER_MODEL, related_name='user2', on_delete=models.CASCADE)
+
+    def __str__(self):
+        return self.room_name
+
+class ChatMessage(models.Model):
+    room_name = models.ForeignKey(ChatRoom, default='99999', related_name='messages', on_delete=models.CASCADE)
+    message = models.TextField()
+    username = models.CharField(max_length=100)
+    timestamp = models.DateTimeField(auto_now_add=True)
+
+    def as_dict(self):
+        return {
+            "room_name": self.room_name,
+            "message": self.message,
+            "username": self.username,
+            "timestamp": self.timestamp.isoformat(),
+        }

chat/ChatApp/chat/routing.py

@@ -0,0 +1,8 @@
+from django.urls import path , include
+from chat.consumers import ChatConsumer
+
+# Here, "" is routing to the URL ChatConsumer which 
+# will handle the chat functionality.
+websocket_urlpatterns = [
+    path("chat/<str:room_name>/", ChatConsumer.as_asgi()), 
+] 

chat/ChatApp/chat/tests.py

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

chat/ChatApp/chat/urls.py

@@ -0,0 +1,9 @@
+from django.urls import path, include
+from chat import views as chat_views
+from django.contrib.auth.views import LogoutView, LoginView
+
+
+urlpatterns = [
+    path("chat/<str:username>/", chat_views.chatRoom, name="chat_room"),
+    path('users_list/', chat_views.userList, name='user_list'),
+]

chat/ChatApp/chat/views.py

@@ -0,0 +1,56 @@
+from .models import *
+from .forms import *
+from django.http import JsonResponse
+from rest_framework import status
+from django.middleware.csrf import get_token
+from django.shortcuts import get_object_or_404
+from django.db.models import Q
+from user_management.models import CustomUser
+from django.core import serializers
+import json
+
+def chatRoom(request, username):
+    print("-+--+--+-- chatRoom function in views.py - beginning ---+--+-")
+    if not request.user.is_authenticated:
+        return JsonResponse({"error": "User not authenticated"}, status=status.HTTP_401_UNAUTHORIZED)
+    other_user = get_object_or_404(CustomUser, username=username)
+    if other_user == request.user:
+        # Prevent users from chatting with themselves
+        return JsonResponse({"error": "User cannot chat with herself/himself"}, status=status.HTTP_403_FORBIDDEN)
+    
+    # Check if the other user is blocked by the authenticated user
+    if request.user.blocked_users.filter(id=other_user.id).exists():
+        return JsonResponse({"error": "User is blocked"}, status=status.HTTP_403_FORBIDDEN)
+    
+    room_name = f"{min(request.user.id, other_user.id)}_{max(request.user.id, other_user.id)}"
+    
+    chat_room = ChatRoom.objects.filter(Q(user1=request.user, user2=other_user) | Q(user1=other_user, user2=request.user)).first()
+    if not chat_room:
+        chat_room = ChatRoom.objects.create(user1=request.user, user2=other_user, room_name=room_name)
+
+    messages = ChatMessage.objects.filter(room_name=chat_room).order_by('timestamp')
+    serialized_messages = serializers.serialize('json', messages)
+    messages_list = json.loads(serialized_messages)
+
+    print( "-- room_name: ", room_name)
+    print( "-- username: ", request.user.username)
+    print("-- messages: ", serialized_messages)
+    print("-- other_user: ", other_user.username)
+    
+    context = {
+        "room_name": room_name,
+        "username": request.user.username,
+        "messages": messages_list,
+        "other_user": other_user.username,
+        "status": status.HTTP_200_OK
+    }
+    return JsonResponse(context, status=status.HTTP_200_OK)
+
+def userList(request):
+    if not request.user.is_authenticated:
+        return JsonResponse({"error": "User not authenticated"}, status=status.HTTP_401_UNAUTHORIZED)
+    if request.method == 'POST':
+        users = CustomUser.objects.exclude(username=request.user.username)
+        user_data = [{'username': user.username} for user in users]
+        return JsonResponse({'users': user_data}, status=status.HTTP_200_OK)
+    return JsonResponse({"error": "Invalid request method"}, status=status.HTTP_405_METHOD_NOT_ALLOWED)

chat/ChatApp/manage.py

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+#!/usr/bin/env python
+"""Django's command-line utility for administrative tasks."""
+import os
+import sys
+
+
+def main():
+    """Run administrative tasks."""
+    os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'ChatApp.settings')
+    try:
+        from django.core.management import execute_from_command_line
+    except ImportError as exc:
+        raise ImportError(
+            "Couldn't import Django. Are you sure it's installed and "
+            "available on your PYTHONPATH environment variable? Did you "
+            "forget to activate a virtual environment?"
+        ) from exc
+    execute_from_command_line(sys.argv)
+
+
+if __name__ == '__main__':
+    main()