server.js

import express from "express";
import dotenv from "dotenv";
import stripe from "stripe";

// Load variables
dotenv.config();

// Start Server

const app = express();

app.use(express.static("public"));
app.use(express.json());


// Home Route
app.get("/", (req,res) => {
    res.sendFile("index.html", {root: "public"});
});

//Sucessful Order
app.get("/success", (req,res) => {
    res.sendFile("SuccessPayment.html", {root: "public"});
});

// Failed Order
app.get("/cancel", (req,res) => {
    res.sendFile("orderfailed.html", {root: "public"});
});


// Stripe 
let stripeGateway = stripe(process.env.stripe_api);
let DOMAIN = process.env.DOMAIN;

app.post('/stripe-checkout', async (req,res) => {
    const lineItems = req.body.items.map((item) => {
        const unitAmount = parseInt(item.price.replace(/[^0-9.-]+/g, '') + 100);
        console.log("item-price:", item.price);
        console.log("unitAmount:", unitAmount);
        return {
            price_data: {
                currency: 'usd', 
                product_data: {
                    name: item.title, 
                    images: [item.productImg]
                }, 
                unit_amount: unitAmount, 
            },
            quantity: item.quantity,
        };
    });
    console.log("lineItems:" , lineItems);

    // Create Checkout Session

    const session = await stripeGateway.checkout.sessions.create({
        payment_method_types: ["card"], 
        mode: "payment", 
        success_url: `${DOMAIN}/success`,
        cancel_url: `${DOMAIN}/cancel`,
        line_items: lineItems,
        // Asking Address in Stripe Checkout Page
        billing_address_collection: 'required'
    });
    res.json(session.url);
});

// Create Checkout Session


app.listen(3000, () => {
    console.log("listening on port 3000;");
});