delete_a_request.js

const Joi = require('joi')
const express = require('express');
const app = express();

app.use(express.json());

const tasks = [
    { id: 1, name: 'Nodejs' },
    { id: 2, name: 'Javascript' },
    { id: 3, name: 'Expressjs' },
];

app.get('/', (req, res) => {
    res.send('Hello World!!!');
});

app.get('/api/tasks', (req, res) => {
    res.send(tasks);
});

app.get('/api/tasks/:id', (req, res) => {
    var task = tasks.find(c => c.id === parseInt(req.params.id));
    if (!task) {
        res.status(404).send('The given task ID does not exists');
        return;
    }
    res.send(task);
});

app.post('/api/tasks', (req, res) => {

    const schema = {
        name: Joi.string().min(3).required()
    }

    const result = Joi.validate(req.body, schema);
    if (result.error) {
        res.status(400).send(result.error.details[0].message);
        return;
    }

    const task = {
        id: tasks.length + 1,
        name: req.body.name
    };
    tasks.push(task);
    res.send(task);
});

app.put('/api/tasks/:id', (req, res) => {
    const task = tasks.find(c => c.id === parseInt(req.params.id));
    if (!task) {
        res.status(404).send('The given task ID does not exists');
        return;
    }

    const schema = {
        name: Joi.string().min(3).required()
    }

    const result = Joi.validate(req.body, schema);
    if (result.error) {
        res.status(400).send(result.error.details[0].message);
        return;
    }

    task.name = req.body.name;
    res.send(task);

});

app.delete('/api/tasks/:id', (req, res) => {
    const task = tasks.find(c => c.id === parseInt(req.params.id));
    if (!task) {
        res.status(404).send('The given task ID does not exists');
        return;
    }

    const ind = tasks.indexOf(task);
    tasks.splice(ind, 1);

    res.send('Course has been deleted');

});

app.listen(3000, () => console.log('Listening on port 3000....'));