Changes made on Wednesdays lesson

src/routes/client/index.js

@@ -1,12 +1,18 @@
 const app = require('../../loaders/express-handlebars');
 const { createOrder } = require('../../services/server/klarna');
+const { getItemById } = require('../../services/server/fakeStore');
 
-app.get('/', async function (req, res, next) {
-	// Replace with HTML snippet from CreateOrder Klarna Request
-	const klarnaJsonResponse = await createOrder();
-	const html_snippet = klarnaJsonResponse.html_snippet;
-	console.log('Order id: ', klarnaJsonResponse.order_id);
-	res.render('checkout', { klarna_checkout: html_snippet });
+app.get('/checkout/:product_id', async function (req, res, next) {
+	try {
+		const product_id = req.params.product_id;
+		const product = await getItemById(product_id);
+		const klarnaJsonResponse = await createOrder(product);
+		const html_snippet = klarnaJsonResponse.html_snippet;
+		console.log('Order id: ', klarnaJsonResponse.order_id);
+		res.render('checkout', { klarna_checkout: html_snippet });
+	} catch (error) {
+		res.send(error.message);
+	}
 });
 
 module.exports = app;

src/services/server/fakeStore.js

@@ -0,0 +1,14 @@
+import fetch from 'node-fetch';
+
+async function getItemById(id) {
+	const response = await fetch(`https://fakestoreapi.com/products/${id}`);
+	if (response.ok) {
+		const product = await response.json();
+		return product;
+	} else {
+		console.error('ERROR: ', response);
+		throw new Error('500 error! Fake store API not available');
+	}
+}
+
+module.exports = { getItemById };

src/services/server/klarna.js

@@ -7,8 +7,41 @@ function getKlarnaAuth() {
 	return auth;
 }
 
+function formatAsOrderLines(currentCart) {
+	currentCart.forEach((item) => {
+		item.total_amount = item.quantity * item.unit_price;
+		item.total_tax_amount = item.total_amount - (item.total_amount * 10000) / (10000 + item.tax_rate);
+	});
+	return currentCart;
+}
+
+function formatProduct(product) {
+	return {
+		type: 'physical', // same
+		reference: product.id,
+		name: product.title,
+		quantity: 1, // As a challenge, this value should be dynamic so that we can buy multiple items
+		quantity_unit: 'pcs', // same
+		unit_price: parseInt(product.price) * 100,
+		tax_rate: 2500, // same
+		total_discount_amount: 0, // same
+		image_url: product.image
+	};
+}
+
 // 1. Add async createOrder function that returns Klarna response.json()
-async function createOrder() {
+async function createOrder(product) {
+	const formattedProduct = formatProduct(product);
+	const order_lines = formatAsOrderLines([formattedProduct]);
+
+	let order_amount = 0;
+	let order_tax_amount = 0;
+
+	order_lines.forEach((item) => {
+		order_amount += item.total_amount;
+		order_tax_amount += item.total_tax_amount;
+	});
+
 	// Sub Parts
 	const path = '/checkout/v3/orders';
 	const auth = getKlarnaAuth();
@@ -26,28 +59,24 @@ async function createOrder() {
 		purchase_country: 'SE',
 		purchase_currency: 'SEK',
 		locale: 'sv-SE',
-		order_amount: 50000,
-		order_tax_amount: 4545,
-		order_lines: [
-			{
-				type: 'physical',
-				reference: '19-402-USA',
-				name: 'Red T-Shirt',
-				quantity: 5,
-				quantity_unit: 'pcs',
-				unit_price: 10000,
-				tax_rate: 1000,
-				total_amount: 50000,
-				total_discount_amount: 0,
-				total_tax_amount: 4545
-			}
-		],
+		order_amount: order_amount,
+		order_tax_amount: order_tax_amount,
+		order_lines,
 		merchant_urls: {
 			terms: 'https://www.example.com/terms.html',
 			checkout: 'https://www.example.com/checkout.html',
 			confirmation: `${process.env.CONFIRMATION_URL}/confirmation?order_id={checkout.order.id}`,
 			push: 'https://www.example.com/api/push'
-		}
+		},
+		shipping_options: [
+			{
+				id: 'express_priority',
+				name: 'Techover EXPRESS 1-2 full moons',
+				price: 39 * 100,
+				tax_amount: 0,
+				tax_rate: 0
+			}
+		]
 	};
 
 	const body = JSON.stringify(payload);