123 lines
3.4 KiB
JavaScript
123 lines
3.4 KiB
JavaScript
import express from 'express';
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import color from 'chalk';
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import cors from 'cors';
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// Model
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import ProductModel from './model/ProductModel.js'; // Dateiendung nicht vergessen
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const PORT = 8000;
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const HOST = '127.0.0.1'; // 'localhost'
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const BASE_URL = `http://${HOST}:${PORT}`;
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const app = express();
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const products = ProductModel();
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const corsOptions = {
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origin: 'http://localhost:3000',
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optionsSuccessStatus: 200, // some legacy browsers (IE11, various SmartTVs) choke on 204
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};
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// lade Produkte
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products.load();
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// Middleware
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app.use(cors(corsOptions)); // Fängt alle HTTP-Requests vor den Routenabfragen ab.
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app.use(express.json()); // HTTP-Request Body wird als JSON Objekt erwartet und geparsed wird.
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// Routes
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app.get('/', (req, res) => {
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// console.log(req.headers);
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res.send('SERVER WORKS!'); // HTTP-Response wird gesendet.
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});
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app.get('/persons', (req, res) => {
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// res.setHeader('Content-Type', 'application/json'); // nicht notwendig den Content-Type selber zu definieren, da das express automatisch zuweist.
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const persons = [
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{ firstName: 'John', lastName: 'Wick' },
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{ firstName: 'Jane', lastName: 'Doe' },
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{ firstName: 'Max', lastName: 'Mustermann' },
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];
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// res.send(JSON.stringify(persons)); // nicht notwendig JS Objekte in JSON Strings umzuwandeln, das das express automatisch umwandelt
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res.send(persons);
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});
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// REST API ======
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// Representational State Transfer (abgekürzt REST)
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// GET - Daten Holen
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// POST - Daten hinzufügen
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// PUT/PATCH - Daten aktualisieren / Einen Datensatz aktualisieren
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// DELETE - Daten löschen
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// HTTP - Methode - POST
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// (C)RUD - create - neues Produkt erstellen
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// BRE(A)D - add
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app.post('/api/products', (req, res) => {
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const product = req.body;
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if (!products.add(product)) {
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return res.status(400).send({ msg: 'Could not add product', status: 400, success: false });
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}
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return res.send({ msg: 'Product added', status: 200, success: true, data: product });
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});
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// HTTP - Methode - GET
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// C(R)UD - read
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// (B)READ - browse
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app.get('/api/products', (req, res) => {
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const data = products.getAll();
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return res.send(data);
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});
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// HTTP - Methode - GET
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// C(R)UD - read
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// B(R)EAD - read
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app.get('/api/products/:id', (req, res) => {
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const id = req.params.id; // routenparameter :id wird als Eigenschaft in params-Objekt abgelegt
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const product = products.get(id);
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if (!product) {
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return res.status(400).send({ msg: 'Could not get product', status: 400, success: false });
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}
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return res.send(product);
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});
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// HTTP - Methode - PUT/PATCH
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// CR(U)D - update
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// BR(E)AD - edit
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app.put('/api/products', (req, res) => {
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const product = req.body;
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const updated = products.update(product);
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if (!updated) {
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return res.status(400).send({ msg: 'Could not update product', status: 400, success: false });
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}
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return res.send({ msg: 'Product updated', status: 200, success: true, data: product });
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});
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// HTTP - Methode - DELETE
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// CRU(D) - delete
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// BREA(D) - delete
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app.delete('/api/products/:id', (req, res) => {
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const id = req.params.id;
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if (!products.delete(id)) {
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return res.status(400).send({ msg: 'Could not delete product', status: 400, success: false });
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}
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return res.send({ msg: 'Product deleted', status: 200, success: true, data: id });
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});
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// =========
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app.listen(PORT, HOST, () => {
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console.log(color.magenta(`🚀 Server is running at: ${BASE_URL}`));
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console.log(color.yellow('CTRL + C to close.'));
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});
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