Harjutus 1: REST API demo käima saamine

1. Paigalda Node.js
2. Loo töölauale kaust rest–api

3. Käivita koodiredaktor (nt VS Code, WebStorm vms) ja ava see kaust projektina

4. Loo kausta fail index.js järgneva sisuga:

index.js

// Kasutame moduleid
const express = require('express');
const cors = require('cors');

//Loome leht
const app = express();

app.use(cors());
app.use(express.json());

const widgets = [
    {id: 1, name:"Vsevolod", vanus: "18"},
    {id: 2, name:"Bogdan", vanus: "17"},
    {id: 3, name:"Vlad", vanus: "17"},
    {id: 4, name:"Aleksander", vanus: "18"},
    {id: 5, name:"David", vanus: "18"}
]

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

app.get('/widgets/:id', (req, res) => {
    if (typeof widgets[req.params.id - 1 ] === 'undefined'){
        return res.status(404).send({error: "Widget not found"})    
    }
    res.send(widgets[req.params.id - 1])
})

app.post('widgets', (req,res) =>{
    if (!req.body.name || !req.body.price) {
        return res.status(400).send({error: "One or all params are missing"})
    }
    let newWidget = {
        id: widgets.length,
        name: req.body.name,
        age:req.body.age
    }
    widgets.push(newWidget)
    req.status(201)
        .location('localhost:8080/widgets/' + (widgets.length-1))
        .send(newWidget)
})

// Kustutamine

app.delete('widgets/:id', (req, res) => {
    if (typeof widgets [req.params.id - 1] === 'undefined'){
        return res.status(404).send({error: "Widget not found"})
    }
    widgets.splice(req.params.id - 1, 1)
    req.status(204).send()
})

app.listen(8080, () => {
    console.log('API up at: http://localhost:8080')
});

4. Avame terminali ja kirjutame sinna sisse npm start või node <faili mida on sull>