added prototype

webseite-gulp-ts/backend/server.js

@@ -0,0 +1,158 @@
+import express from 'express';
+import color from 'chalk';
+import cors from 'cors';
+import dotenv from 'dotenv';
+
+dotenv.config(); // Sensible Konfigurationsvariablen in .env Datei auslagern
+
+// Model
+import ProductModel from './model/ProductModel.js'; // Dateiendung nicht vergessen
+
+const PORT = process.env.SERVER_PORT; // || 8000;
+const HOST = process.env.SERVER_HOST; // || '127.0.0.1'; // 'localhost'
+const BASE_URL = `http://${HOST}:${PORT}`;
+
+const app = express();
+const products = ProductModel();
+
+const corsOptions = {
+  origin: ['http://localhost:3000', 'http://127.0.0.1:3000'],
+  optionsSuccessStatus: 200, // some legacy browsers (IE11, various SmartTVs) choke on 204
+};
+
+// lade Produkte
+products.load();
+
+// Middleware
+app.use(cors(corsOptions)); // Fängt alle HTTP-Requests vor den Routenabfragen ab.
+app.use(express.json()); // HTTP-Request Body wird als JSON Objekt erwartet und geparsed wird. // app.use(bodyParser.json()) - Modul body-parser war in express 4 notwendig
+
+app.use((req, res, next) => {
+  console.log(color.yellow('HTTP-Method: '), color.magenta(req.method));
+  next();
+});
+
+// Routes
+app.get('/', (req, res) => {
+  // console.log(req.headers);
+
+  res.send('SERVER WORKS!'); // HTTP-Response wird gesendet.
+});
+
+app.get('/persons', (req, res) => {
+  // res.setHeader('Content-Type', 'application/json'); // nicht notwendig den Content-Type selber zu definieren, da das express automatisch zuweist.
+
+  const persons = [
+    { firstName: 'John', lastName: 'Wick' },
+    { firstName: 'Jane', lastName: 'Doe' },
+    { firstName: 'Max', lastName: 'Mustermann' },
+  ];
+  // res.send(JSON.stringify(persons)); // nicht notwendig JS Objekte in JSON Strings umzuwandeln, das das express automatisch umwandelt
+
+  res.send(persons);
+});
+
+// REST API ======
+// Representational State Transfer (abgekürzt REST)
+// GET - Daten Holen
+// POST - Daten hinzufügen
+// PUT/PATCH - Daten aktualisieren / Einen Datensatz aktualisieren
+// DELETE - Daten löschen
+
+// HTTP - Methode - POST
+// (C)RUD - create - neues Produkt erstellen
+// BRE(A)D - add
+app.post('/api/products', (req, res) => {
+  const product = req.body;
+
+  if (!products.add(product)) {
+    return res.status(400).send({ msg: 'Could not add product', status: 400, success: false });
+  }
+
+  return res.send({ msg: 'Product added', status: 200, success: true, data: product });
+});
+
+// HTTP - Methode - GET
+// C(R)UD - read
+// (B)READ - browse
+app.get('/api/products', (req, res) => {
+  const data = products.getAll();
+  return res.send(data);
+});
+
+// HTTP - Methode - GET
+// C(R)UD - read
+// B(R)EAD - read
+app.get('/api/products/:id', (req, res) => {
+  const id = req.params.id; // routenparameter :id wird als Eigenschaft in params-Objekt abgelegt
+  const product = products.get(id);
+
+  if (!product) {
+    return res.status(400).send({ msg: 'Could not get product', status: 400, success: false });
+  }
+
+  return res.send(product);
+});
+
+// HTTP - Methode - PUT/PATCH
+// CR(U)D - update
+// BR(E)AD - edit
+app.put('/api/products', (req, res) => {
+  const product = req.body;
+
+  const updated = products.update(product);
+
+  if (!updated) {
+    return res.status(400).send({ msg: 'Could not update product', status: 400, success: false });
+  }
+
+  return res.send({ msg: 'Product updated', status: 200, success: true, data: product });
+});
+
+// HTTP - Methode - PATCH
+// reseten von Produkten
+app.patch('/api/products/reset', (req, res) => {
+  const reset = req.body.reset;
+
+  if (!reset) {
+    return res.status(400).send({ msg: 'Could not reset products', status: 400, success: false });
+  }
+
+  products.reset();
+
+  return res.send({ msg: 'Products reseted', status: 200, success: true, data: reset });
+});
+
+// HTTP - Methode - PATCH
+// speichern von Produkten
+app.patch('/api/products/save', (req, res) => {
+  const save = req.body.save;
+
+  if (!save) {
+    return res.status(400).send({ msg: 'Could not save products', status: 400, success: false });
+  }
+
+  products.save();
+
+  return res.send({ msg: 'Products saved', status: 200, success: true, data: save });
+});
+
+// HTTP - Methode - DELETE
+// CRU(D) - delete
+// BREA(D) - delete
+app.delete('/api/products/:id', (req, res) => {
+  const id = req.params.id;
+
+  if (!products.delete(id)) {
+    return res.status(400).send({ msg: 'Could not delete product', status: 400, success: false });
+  }
+
+  return res.send({ msg: 'Product deleted', status: 200, success: true, data: id });
+});
+
+// =========
+
+app.listen(PORT, HOST, () => {
+  console.log(color.magenta(`🚀 Server is running at: ${BASE_URL}`));
+  console.log(color.yellow('CTRL + C to close.'));
+});