Simple Chat Application

A real-time chat application that allows users in the same network to communicate through a modern interface.

Features

• Random nickname generation on entry
• Real-time user presence detection
• Direct messaging between users
• No database required (temporary chats)
• Minimal setup needed

Technology Stack

• Backend: Python FastAPI
• Frontend: Svelte
• Real-time Communication: WebSockets

Project Structure

simple-chat/
├── backend/           # FastAPI backend
│   ├── main.py       # Main application file
│   └── requirements.txt
└── frontend/         # Svelte frontend
    ├── src/
    │   ├── components/
    │   │   ├── UserList.svelte   # User list component
    │   │   └── ChatWindow.svelte # Chat interface component
    │   ├── App.svelte
    │   ├── main.js
    │   └── app.css
    ├── public/
    ├── package.json
    └── vite.config.js

Installation

Backend Setup

1. Make sure you have Python 3.8+ installed
2. Install dependencies:

   cd backend
   pip install -r requirements.txt

Frontend Setup

1. Make sure you have Node.js 16+ installed
2. Install dependencies:

   cd frontend
   npm install

Docker Setup

The easiest way to run the application is using Docker and Docker Compose with our single-container setup:

1. Make sure you have Docker and Docker Compose installed
2. Build and start the container:

   docker-compose up --build

3. The application will be available at:
   • Frontend: http://localhost:5173
   • Backend API: http://localhost:8000

Building and Running Manually

You can also build and run the container manually:

# Build the image
docker build -t simple-chat .

# Run the container
docker run -p 8000:8000 -p 5173:5173 simple-chat

Running the Application

Start the Backend

cd backend
uvicorn main:app --reload --host 0.0.0.0 --port 8000

This will start the FastAPI server on port 8000.

Start the Frontend

cd frontend
npm run dev -- --host

This will start the Svelte development server, usually on port 5173.

Usage

1. Open your browser and navigate to http://localhost:5173
2. You'll automatically be assigned a random nickname
3. All users in the same network will appear in the user list
4. Click on a user to start chatting with them
5. Messages are temporary and will be lost if the page is refreshed

Network Configuration

By default, the application is configured to work on a local network:

• Backend accessible at: http://your-ip-address:8000
• Frontend accessible at: http://your-ip-address:5173

Make sure to allow these ports through your firewall if you want others on the same network to connect.

Customization

• Modify /backend/main.py to change server behavior or nickname generation
• Edit Svelte components in /frontend/src/components/ to customize the UI