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