rest_api.js

const express = require('express');
const bodyParser = require('body-parser');
const { Pool } = require('pg');

// Database connection
const pool = new Pool({
  user: process.env.DB_USER,
  host: process.env.DB_HOST,
  database: process.env.DB_NAME,
  password: process.env.DB_PASSWORD,
  port: process.env.DB_PORT,
});

const app = express();
app.use(bodyParser.json());

// GET endpoint to retrieve items
app.get('/items', async (req, res) => {
  try {
    const result = await pool.query('SELECT * FROM items');
    res.status(200).json(result.rows);
  } catch (err) {
    res.status(500).send(err.message);
  }
});

// POST endpoint to add a new item
app.post('/items', async (req, res) => {
  const { name, description } = req.body;
  try {
    const result = await pool.query('INSERT INTO items (name, description) VALUES ($1, $2) RETURNING *', [name, description]);
    res.status(201).json(result.rows[0]);
  } catch (err) {
    res.status(500).send(err.message);
  }
});

const PORT = process.env.PORT || 3000;
app.listen(PORT, () => {
  console.log(`Server running on port ${PORT}`);
});