main.js

const http = require('http');

const todos= [
    {id: 1, text: 'Todo One'},
    {id: 2, text: 'Todo Two'},
    {id: 3, text: 'Todo Three'}
]

const server = http.createServer((req, res) => {
    const {method, url} = req;
let body = []

    req.on('data', chunk => {
        body.push(chunk);
    }) .on('end', ()=> {
        body = Buffer.concat(body).toString();
        
        let status = 404;
        const response = {
            success: false,
            data: null,
            error: null
        }

        if(method === 'GET' && url === '/todos') {
            status = 200;
            response.success = true;
            response.data = todos;
        } else if(method ==='POST' && url === '/todos') {
            const {id, text} = JSON.parse(body);

            if(!id || !text) {
                status = 400
                response.error = 'please add id and text'
            } else {
                todos.push({id, text});
            status = 201;
            response.success = true;
            response.data = todos
            }
            
        }
        res.writeHeader(status, {
            'Content-Type': 'application/json',
            'X-Powered-By': 'Node.js'
        });

        res.end(
            JSON.stringify(response)
        );
    })
  
})

const PORT = 5000;

server.listen(PORT, () => console.log(`Server running on port ${PORT}`));