First stripe integration.

User can subscribe and it will be effective in the database. We now need to reflect this on the front end.
Issue : Need to check how to upgrade a current subscription

pages/api/stripe/create-checkout-session.js

@@ -0,0 +1,83 @@
+import Cors from "cors";
+import initMiddleware from "utils/init-middleware";
+
+const rateLimit = require("express-rate-limit");
+
+const cors = initMiddleware(
+  Cors({
+    methods: ["POST"],
+  })
+);
+
+const limiter = initMiddleware(
+  rateLimit({
+    windowMs: 30000, // 30sec
+    max: 4, // Max 4 request per 30 sec
+  })
+);
+// Set your secret key. Remember to switch to your live secret key in production.
+// See your keys here: https://dashboard.stripe.com/apikeys
+const stripe = require("stripe")(process.env.STRIPE_SECRET);
+
+export default async function handler(req, res) {
+  await cors(req, res);
+  await limiter(req, res);
+  if (req.method === "POST") {
+    const priceId = req.body.priceId;
+
+    // See https://stripe.com/docs/api/checkout/sessions/create
+    // for additional parameters to pass.
+    try {
+      const session = req.body.customerId
+        ? await stripe.checkout.sessions.create({
+            mode: "subscription",
+            payment_method_types: ["card"],
+            client_reference_id: req.body.userId,
+            metadata: { token: req.body.tokenId, priceId: req.body.priceId },
+            customer: req.body.customerId,
+            line_items: [
+              {
+                price: priceId,
+                // For metered billing, do not pass quantity
+                quantity: 1,
+              },
+            ],
+            // {CHECKOUT_SESSION_ID} is a string literal; do not change it!
+            // the actual Session ID is returned in the query parameter when your customer
+            // is redirected to the success page.
+            success_url: `${req.headers.origin}/dashboard?session_id={CHECKOUT_SESSION_ID}`,
+            cancel_url: `${req.headers.origin}/dashboard?session_id=canceled`,
+          })
+        : await stripe.checkout.sessions.create({
+            mode: "subscription",
+            payment_method_types: ["card"],
+            customer_email: req.body.email,
+            client_reference_id: req.body.userId,
+            metadata: { token: req.body.tokenId, priceId: req.body.priceId },
+            line_items: [
+              {
+                price: priceId,
+                // For metered billing, do not pass quantity
+                quantity: 1,
+              },
+            ],
+            // {CHECKOUT_SESSION_ID} is a string literal; do not change it!
+            // the actual Session ID is returned in the query parameter when your customer
+            // is redirected to the success page.
+            success_url: `${req.headers.origin}/dashboard?session_id={CHECKOUT_SESSION_ID}`,
+            cancel_url: `${req.headers.origin}/dashboard?session_id={CHECKOUT_SESSION_ID}`,
+          });
+
+      res.send({
+        sessionId: session.id,
+      });
+    } catch (e) {
+      res.status(400);
+      return res.send({
+        error: {
+          message: e.message,
+        },
+      });
+    }
+  }
+}