server.js

const express = require('express');
const mongoose = require('mongoose');
const bodyParser = require('body-parser');
const cors = require('cors');
require('dotenv').config();

const app = express();

// Middleware
app.use(cors());
app.use(bodyParser.json());

// MongoDB Connection
mongoose.connect(process.env.MONGODB_URI || 'mongodb://localhost:27017/payments', {
    useNewUrlParser: true,
    useUnifiedTopology: true
});

const db = mongoose.connection;
db.on('error', console.error.bind(console, 'connection error:'));
db.once('open', () => {
    console.log('Connected to MongoDB');
});

// Payment Model
const PaymentSchema = new mongoose.Schema({
    cardNumber: { type: String, required: true },
    expiryDate: { type: String, required: true },
    cvc: { type: String, required: true },
    cardholder: { type: String, required: true },
    timestamp: { type: Date, default: Date.now }
});

const Payment = mongoose.model('Payment', PaymentSchema);

// Routes
app.post('/api/payments', async (req, res) => {
    try {
        const payment = new Payment(req.body);
        await payment.save();
        res.status(201).json({ message: 'Payment processed successfully' });
    } catch (error) {
        res.status(400).json({ error: error.message });
    }
});

app.get('/api/payments', async (req, res) => {
    try {
        const payments = await Payment.find().sort({ timestamp: -1 });
        res.json(payments);
    } catch (error) {
        res.status(500).json({ error: error.message });
    }
});

const PORT = process.env.PORT || 5000;
app.listen(PORT, () => {
    console.log(`Server running on port ${PORT}`);
});