I am excited to announce the release of my new Node.js package: Car Auction! This package provides a robust and flexible framework for creating a car auction system using Express.js and MongoDB. Whether you're building a simple auction platform or a more complex application, this package offers the essential features you need to get started.

Features

Express.js Integration: The package is built on top of Express.js, making it easy to set up and customize your server.
MongoDB Support: Seamlessly connect to MongoDB for data storage, allowing you to manage auction data efficiently.
Bid Management: Place, update, and manage bids with built-in validation to ensure a smooth bidding process.
Auction Control: End auctions and select winners with permission-based access control, ensuring that only authorized users can perform critical actions.

Getting Started

To get started with the Car Auction package, follow these simple steps:

1. Install Dependencies

Make sure you have Node.js and MongoDB installed. Then, install the required dependencies:

npm install express mongoose

2. Set Up the Server

Create a file named server.js and add the following code:

const express = require('express');
const mongoose = require('mongoose');
const SakshCarAuction = require('./index');

const app = express();
const port = 3000;

// Middleware to parse JSON
app.use(express.json());

// Connect to MongoDB
mongoose.connect('mongodb://localhost:27017/auctionDB', { 
    useNewUrlParser: true, 
    useUnifiedTopology: true 
})
.then(() => console.log('MongoDB connected'))
.catch(err => console.error('MongoDB connection error:', err));

// Example user IDs
const userId1 = 'user123';
const userId2 = 'user456';
const userId3 = 'user789';

// Create instances of SakshCarAuction for different users
const auction1 = new SakshCarAuction(userId1);
const auction2 = new SakshCarAuction(userId2);
const auction3 = new SakshCarAuction(userId3);

// Example callback function for bid validation
const validateBid = (carId, bidAmount) => {
    return bidAmount > 0; // Example validation: bid amount must be greater than 0
};

// Example callback function for permission validation
const validatePermission = (userId, resourceId, action) => {
    if (action === "updatebid" || action === "selectwinner" || action === "closebidding") {
        return userId === 'user123'; // Example validation: only user123 has permission for these actions
    }
    return true;
};

// Define routes for placing bids, updating bids, ending auctions, and selecting winners
// (Add your route definitions here)

// Start the server
app.listen(port, () => {
    console.log(`Server running at http://localhost:${port}`);
});

3. Start the Server

Run the server using the following command:

node server.js

4. Test the API

You can use tools like curl or Postman to test the API endpoints. Here are some example commands:

Place a Bid:

curl -X POST http://localhost:3000/placeBid -H "Content-Type: application/json" -d '{"carId": "66ebd87c0cab7b7737ecda1a", "bidAmount": 5000, "userId": "user123"}'

Update a Bid:

curl -X PUT http://localhost:3000/updateBid -H "Content-Type: application/json" -d '{"bidId": "bid123", "newBidAmount": 6000, "userId": "user123"}'

End the Auction:

curl -X POST http://localhost:3000/endAuction -H "Content-Type: application/json" -d '{"carId": "66ebd87c0cab7b7737ecda1a", "userId": "user123"}'

Select the Winner:

curl -X POST http://localhost:3000/selectWinner -H "Content-Type: application/json" -d '{"carId": "66ebd87c0cab7b7737ecda1a", "userId": "user123"}'

Conclusion

The Car Auction package is designed to simplify the process of building a car auction system. With its easy-to-use API and built-in validation, you can focus on creating a great user experience without worrying about the underlying complexities.

I invite you to try out the Car Auction package and provide feedback. Your contributions and suggestions are always welcome!

Happy coding!

Node.js package: Car Auction!