Chat Messenger Project

This is a dummy project used to demonstrate knowledge of Node.js and Angular, as well as development in general. It serves as an example with some bad practices included.

Technologies

• Backend: Node.js (Express, TypeScript)
• Frontend: Angular
• API: REST with OpenAPI (openapi.yaml file)

Repository Structure

• /backend - Contains all backend-related files.
• /frontend - Contains all frontend-related files.
• /docs - Contains the OpenAPI definition file and any additional documentation.

Backend

Installation

1. Navigate to the backend directory:

   cd backend

2. Install the dependencies:

   npm install

Running the Server

1. Build and start the server:

   npm run build
   npm start

2. The server will run on port 3000 by default. You can change the port by setting the PORT environment variable:

   export PORT=4000  # For Unix-like systems
   set PORT=4000     # For Windows
   npm start

API Endpoints

• GET /messages - Retrieve all messages
• POST /message - Send a new message
• POST /auth/register - Register a new user
• POST /auth/login - Log in a user

OpenAPI Definition

The OpenAPI definition for the API is located in the /docs directory as openapi.yaml.

Frontend

Installation

1. Navigate to the frontend directory:

   cd frontend

2. Install the dependencies:

   npm install

Running the Application

1. Start the development server:

   npm run serve

2. The application will be accessible at http://localhost:4200.

Development

Backend

The backend is implemented using Node.js and Express with TypeScript. The main server file is src/index.ts.

Error Handling

Custom error handling middleware is implemented in src/middlewares/errorHandler.ts.

Plugin System

The backend supports a plugin system for extensibility. Plugins are loaded from the plugins directory. A sample chatbot plugin is included in plugins/chatbot.ts.

Authentication

User authentication is implemented using JWT. Authentication middleware is located in src/middlewares/authMiddleware.ts.

Frontend

The frontend is implemented using Angular. The main application file is src/app/app.component.ts.

API

The API follows RESTful practices and is defined using OpenAPI. The definition file is located in /docs/openapi.yaml.

Acknowledgments

This project is a part of a recruitment exercise to demonstrate knowledge and skills in Node.js and Angular.