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feat: day 29

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This commit is contained in:
Philippe Torrel
2026-07-23 14:00:55 +02:00
parent ad296423bc
commit 702443e90e
18 changed files with 1248 additions and 11 deletions
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3
03_dom/agenda.md
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@@ -433,7 +433,7 @@ Projekte
- **Exkurs: DOM Inhalte über REST API mit Express Part I**
- **Routing in JS**
- CRUD - Create - Read - Update - Delete
- CRUD - Create - (Read) - Update - Delete
- Object Methoden.
- Verwendung von Modulen (Bootstrap)
@@ -449,6 +449,7 @@ Projekte & optionale Übungen
- **Exkurs: DOM Inhalte über mit REST API Express**
- **Erweiterung Frontend um REST API**
- CRUD - Create - Read - Update - Delete
- BREAD - Browse - Read - Edit - Add - Delete
- Verwendung von Modulen (Modal von BS, Toastify, Splide)

4
03_dom/linksammlung.md
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@@ -110,3 +110,7 @@
## KI Tools
- [AI Models](https://artificialanalysis.ai/models)
## REST API
- [Enable-Cors](https://enable-cors.org/) - CORS Settings für Server/Client

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03_dom/unterricht/tag29/01_README.md Normal file
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@@ -0,0 +1 @@
**Exkurs: Webserver mit Express + REST API + Frontend nach CRUD/BREAD**

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03_dom/unterricht/tag29/02_routenparameter-queries.zip Normal file
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03_dom/unterricht/tag29/02_routenparameter-queries/package-lock.json generated Normal file
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15
03_dom/unterricht/tag29/02_routenparameter-queries/package.json Normal file
View File

@@ -0,0 +1,15 @@
{
"name": "02_routenparameter-queries",
"version": "1.0.0",
"description": "",
"main": "server.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
},
"keywords": [],
"type": "module",
"dependencies": {
"chalk": "^5.6.2",
"express": "^5.2.1"
}
}

32
03_dom/unterricht/tag29/02_routenparameter-queries/server.js Normal file
View File

@@ -0,0 +1,32 @@
import express from 'express';
import color from 'chalk';
const PORT = 8080;
const HOST = '127.0.0.1'; // 'localhost'
const BASE_URL = `http://${HOST}:${PORT}`;
const app = express();
// Middleware
app.use(express.static('./public'));
// Routes
app.get('/', (req, res) => {
res.send('Server works..');
});
// http://127.0.0.1:8080/api/flight/NCE-FRA
app.get('/api/flight/:from-:to', (req, res) => {
res.send(req.params); // Routenparameter
});
// http://127.0.0.1:8080/api/flights?from=NCE&to=FRA'
app.get('/api/flights', (req, res) => {
res.send(req.query); // Query-Object
});
// Server start
app.listen(PORT, HOST, () => {
console.log(color.green(`🚀 SERVER IS RUNNING AT: ${BASE_URL}`));
console.log(color.yellow('CTRL + C to shutdown'));
});

6
03_dom/unterricht/tag29/02_routenparameter-queries/test.rest Normal file
View File

@@ -0,0 +1,6 @@
GET http://127.0.0.1:8080/api/flight/NCE-FRA
###
GET http://127.0.0.1:8080/api/flights?from=NCE&to=FRA

48
webseite/backend/api.rest Normal file
View File

@@ -0,0 +1,48 @@
# BROWSE Products
GET http://127.0.0.1:8000/api/products
###
# READ Product
GET http://127.0.0.1:8000/api/products/c38913d4-9524-461f-85d2-525241166e8e
###
# ADD Product
POST http://127.0.0.1:8000/api/products
Content-Type: application/json
{
"name": "Testproduct",
"price": 9.99
}
###
# UPDATE Product
PUT http://127.0.0.1:8000/api/products
Content-Type: application/json
{
"_id": "940c316b-518c-4a18-b1f6-328e010eef4d",
"name": "Testproduct Updated",
"price": 123.22
}
###
# DELETE Product
DELETE http://127.0.0.1:8000/api/products/940c316b-518c-4a18-b1f6-328e010eef4d
Content-Type: application/json

12
webseite/backend/data/products.json
View File

@@ -22,5 +22,17 @@
"position": 4,
"name": "16-Bit Legendary Hero Heat-Change Mug",
"price": 12.99
},
{
"_id": "3b3352c1-789d-4b4f-8a93-f05f44ece5a5",
"position": 5,
"name": "32-Bit Legendary Hero Heat-Change Mug",
"price": 18.99
},
{
"_id": "5af39d33-cbcd-42c7-a160-50084faa91ba",
"position": 6,
"name": "64-Bit Legendary Hero Heat-Change Mug",
"price": 21.99
}
]

64
webseite/backend/model/ProductModel.js
View File

@@ -1,4 +1,5 @@
import fs from 'node:fs';
import { v4 as id } from 'uuid';
// Factoryfunction
const ProductModel = () => {
@@ -13,6 +14,14 @@ const ProductModel = () => {
}
};
const save = () => {
try {
fs.writeFileSync('./data/products.json', JSON.stringify(products, null, 2), 'utf-8');
} catch (error) {
console.log('Something went wrong:', error);
}
};
const getAll = () => {
return products;
};
@@ -28,11 +37,66 @@ const ProductModel = () => {
return product;
};
const add = (product) => {
const { name, price } = product;
if (!hasAllProps(product)) return false;
products.push({
_id: id(),
name,
price: Number(price.toFixed(2)),
position: products.length + 1,
});
return true;
};
const update = (product) => {
const foundIdx = products.findIndex((obj) => {
return obj._id === product._id;
});
// Guard
if (foundIdx === -1 || !hasAllProps(product)) return false;
products[foundIdx] = product;
return true;
};
const remove = (id) => {
const foundIdx = products.findIndex((obj) => {
return obj._id === id;
});
// Guard
if (foundIdx === -1) return false;
products.splice(foundIdx, 1);
return true;
};
/**
* hasAllProps - Überprüfung ob Product "name" und "price"
* @return boolean
**/
const hasAllProps = (product) => {
// return Object.hasOwn(product, 'name') && Object.hasOwn(product, 'price');
const keys = Object.keys(product); // => ['name', 'price']
return keys.includes('name') && keys.includes('price');
};
return {
// load: load
load,
save,
add,
getAll,
get,
update,
delete: remove,
};
};

16
webseite/backend/package-lock.json generated
View File

@@ -12,7 +12,8 @@
"chalk": "^5.6.2",
"cors": "^2.8.6",
"dotenv": "^17.4.2",
"express": "^5.2.1"
"express": "^5.2.1",
"uuid": "^14.0.1"
}
},
"node_modules/accepts": {
@@ -896,6 +897,19 @@
"node": ">= 0.8"
}
},
"node_modules/uuid": {
"version": "14.0.1",
"resolved": "https://registry.npmjs.org/uuid/-/uuid-14.0.1.tgz",
"integrity": "sha512-6ZxzVpzDXDa3bJWaHilVayA+BH/1zmxCJoVgvmqJnid/gPoKHxUrS/aC/T6LGQtNHT+XHG9fXPJB4d+IrU30Ew==",
"funding": [
"https://github.com/sponsors/broofa",
"https://github.com/sponsors/ctavan"
],
"license": "MIT",
"bin": {
"uuid": "dist-node/bin/uuid"
}
},
"node_modules/vary": {
"version": "1.1.2",
"resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",

3
webseite/backend/package.json
View File

@@ -13,6 +13,7 @@
"chalk": "^5.6.2",
"cors": "^2.8.6",
"dotenv": "^17.4.2",
"express": "^5.2.1"
"express": "^5.2.1",
"uuid": "^14.0.1"
}
}

68
webseite/backend/server.js
View File

@@ -22,6 +22,7 @@ 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.
// Routes
app.get('/', (req, res) => {
@@ -43,11 +44,78 @@ app.get('/persons', (req, res) => {
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 });
}
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();
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 });
}
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 });
}
res.send({ msg: 'Product updated', status: 200, success: true, data: product });
});
// 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 });
}
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.'));

44
webseite/frontend/assets/js/build.js
View File

@@ -5166,6 +5166,7 @@
// dev/scripts/modules/ProductManager.js
var ProductManager = (el = null) => {
const BASE_URL = "http://127.0.0.1:8000";
const module = el || document.querySelector(".product-manager") || console.error("Product Manager not found");
if (!module) return;
const DOM = {
@@ -5176,7 +5177,12 @@
inputPrice: module.querySelector(".input-product-price"),
btnAdd: module.querySelector(".button-product-add"),
templateRow: module.querySelector(".template-row"),
modalEdit: module.querySelector(".modal-edit")
// Modal
modalEdit: module.querySelector(".modal-edit"),
inputEditName: module.querySelector(".input-edit-name"),
inputEditPrice: module.querySelector(".input-edit-price"),
inputEditId: module.querySelector(".input-edit-id"),
inputEditPosition: module.querySelector(".input-edit-position")
};
const bsModalEdit = new Modal(DOM.modalEdit, {
backdrop: "static",
@@ -5198,6 +5204,14 @@
addProduct(product);
disableNonFunctionalButtons();
};
const onClickEdit = (e) => {
const btnEl = e.currentTarget;
const currentRow = parents(btnEl, "tr")[0];
const id = currentRow.dataset.id;
getProduct(id).then((data) => {
showModalEdit(data);
});
};
const onClickRemove = (e) => {
const btnEl = e.currentTarget;
const currentRowEl = parents(btnEl, "tr")[0];
@@ -5256,7 +5270,20 @@
};
const fetchProducts = async () => {
try {
const response = await fetch("http://127.0.0.1:8000/api/products");
const response = await fetch(`${BASE_URL}/api/products`);
if (!response.ok) {
throw new Error("Fetch went wrong.");
}
const data = await response.json();
return data;
} catch (error) {
console.error(error);
return error;
}
};
const getProduct = async (id) => {
try {
const response = await fetch(`${BASE_URL}/api/products/${id}`);
if (!response.ok) {
throw new Error("Fetch went wrong.");
}
@@ -5276,7 +5303,7 @@
});
};
const addProduct = (product) => {
const { name, price } = product;
const { name, price, _id: id, position } = product;
const trEl = DOM.templateRow.content.firstElementChild.cloneNode(true);
const tdNameEl = trEl.querySelector(".td-name");
const tdPriceEl = trEl.querySelector(".td-price");
@@ -5284,8 +5311,10 @@
const btnMoveUpEl = trEl.querySelector(".button-product-move-up");
const btnMoveDownEl = trEl.querySelector(".button-product-move-down");
const btnDragEl = trEl.querySelector(".button-drag");
const btnEditEl = trEl.querySelector(".button-product-edit");
tdNameEl.textContent = name;
tdPriceEl.textContent = price;
btnEditEl.addEventListener("click", onClickEdit);
btnRemoveEl.addEventListener("click", onClickRemove);
btnMoveUpEl.addEventListener("click", onClickMoveUp);
btnMoveDownEl.addEventListener("click", onClickMoveDown);
@@ -5294,8 +5323,17 @@
trEl.addEventListener("dragstart", onDragStart);
trEl.addEventListener("dragover", onDragOver);
trEl.addEventListener("drop", onDrop);
trEl.dataset.id = id;
trEl.dataset.position = position;
DOM.tBody.appendChild(trEl);
};
const showModalEdit = (product) => {
const { name = "", price = 0, _id: id, position } = product;
DOM.inputEditName.value = name;
DOM.inputEditPrice.value = price;
DOM.inputEditId.value = id;
DOM.inputEditPosition.value = position;
};
const disableNonFunctionalButtons = () => {
Array.from(DOM.tBody.querySelectorAll("tr")).forEach((tr) => {
const btnMoveUp = tr.querySelector(".button-product-move-up");

4
webseite/frontend/assets/js/build.js.map
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61
webseite/frontend/dev/scripts/modules/ProductManager.js
View File

@@ -7,6 +7,8 @@ import { Modal } from 'bootstrap'; // ohne Pfadangabe (Modul auslesen aus node_m
const ProductManager = (el = null) => {
// === DOM & VARS =======
const BASE_URL = 'http://127.0.0.1:8000';
const module = el || document.querySelector('.product-manager') || console.error('Product Manager not found');
if (!module) return;
@@ -20,7 +22,12 @@ const ProductManager = (el = null) => {
btnAdd: module.querySelector('.button-product-add'),
templateRow: module.querySelector('.template-row'),
// Modal
modalEdit: module.querySelector('.modal-edit'),
inputEditName: module.querySelector('.input-edit-name'),
inputEditPrice: module.querySelector('.input-edit-price'),
inputEditId: module.querySelector('.input-edit-id'),
inputEditPosition: module.querySelector('.input-edit-position'),
};
const bsModalEdit = new Modal(DOM.modalEdit, {
@@ -54,6 +61,18 @@ const ProductManager = (el = null) => {
disableNonFunctionalButtons();
};
const onClickEdit = (e) => {
const btnEl = e.currentTarget;
const currentRow = parents(btnEl, 'tr')[0];
const id = currentRow.dataset.id;
// async fetch
getProduct(id).then((data) => {
// console.log(data);
showModalEdit(data);
});
};
const onClickRemove = (e) => {
const btnEl = e.currentTarget;
//const currentRowEl = btnEl.parentNode.parentNode; // parentNode -> td - parentNode -> tr
@@ -103,6 +122,7 @@ const ProductManager = (el = null) => {
const currentRowEl = parents(btnEl, 'tr')[0];
currentRowEl.draggable = true;
};
const onMouseUpDrag = (e) => {
const btnEl = e.currentTarget;
const currentRowEl = parents(btnEl, 'tr')[0];
@@ -150,9 +170,31 @@ const ProductManager = (el = null) => {
};
// === XHR/FETCH ========
// HTTP - Methode - GET
// C(R)UD - Read
// (B)READ - Browse - auslesen aller Produkte
const fetchProducts = async () => {
try {
const response = await fetch('http://127.0.0.1:8000/api/products'); // HTTP Request URL
const response = await fetch(`${BASE_URL}/api/products`); // HTTP Request URL
if (!response.ok) {
throw new Error('Fetch went wrong.');
}
const data = await response.json(); // HTTP-Response
return data;
} catch (error) {
console.error(error);
return error;
}
};
// HTTP - Methode - GET
// C(R)UD - Read
// B(R)EAD - Read - auslesen eines Produkts
const getProduct = async (id) => {
try {
const response = await fetch(`${BASE_URL}/api/products/${id}`); // HTTP Request URL
if (!response.ok) {
throw new Error('Fetch went wrong.');
}
@@ -183,7 +225,7 @@ const ProductManager = (el = null) => {
};
const addProduct = (product) => {
const { name, price } = product;
const { name, price, _id: id, position } = product;
// https://developer.mozilla.org/de/docs/Web/API/HTMLTemplateElement/content
const trEl = DOM.templateRow.content.firstElementChild.cloneNode(true);
@@ -195,10 +237,12 @@ const ProductManager = (el = null) => {
const btnMoveDownEl = trEl.querySelector('.button-product-move-down');
const btnDragEl = trEl.querySelector('.button-drag');
const btnEditEl = trEl.querySelector('.button-product-edit');
tdNameEl.textContent = name;
tdPriceEl.textContent = price;
btnEditEl.addEventListener('click', onClickEdit);
btnRemoveEl.addEventListener('click', onClickRemove);
btnMoveUpEl.addEventListener('click', onClickMoveUp);
btnMoveDownEl.addEventListener('click', onClickMoveDown);
@@ -211,9 +255,22 @@ const ProductManager = (el = null) => {
trEl.addEventListener('dragover', onDragOver);
trEl.addEventListener('drop', onDrop);
trEl.dataset.id = id; // <tr data-id="..." >...</tr>
trEl.dataset.position = position; // <tr data-position="..." >...</tr>
DOM.tBody.appendChild(trEl); // Im DOM hinzufügen
};
const showModalEdit = (product) => {
const { name = '', price = 0, _id: id, position } = product;
DOM.inputEditName.value = name;
DOM.inputEditPrice.value = price;
DOM.inputEditId.value = id;
DOM.inputEditPosition.value = position;
};
const disableNonFunctionalButtons = () => {
Array.from(DOM.tBody.querySelectorAll('tr')).forEach((tr) => {
const btnMoveUp = tr.querySelector('.button-product-move-up');

2
webseite/frontend/projects/product-manager.html
View File

@@ -168,6 +168,8 @@
class="form-control input-edit-price" />
<span class="input-group-text">&euro;</span>
</div>
<input type="hidden" name="id" class="input-edit-id" />
<input type="hidden" name="position" class="input-edit-position" />
</div>
</div>
</div>