implemented stripe for the cloud instance

lib/api/checkSubscription.ts

@@ -0,0 +1,50 @@
+import Stripe from "stripe";
+
+export default async function checkSubscription(
+  stripeSecretKey: string,
+  email: string,
+  priceId: string
+) {
+  const stripe = new Stripe(stripeSecretKey, {
+    apiVersion: "2022-11-15",
+  });
+
+  const listByEmail = await stripe.customers.list({
+    email: email.toLowerCase(),
+    expand: ["data.subscriptions"],
+  });
+
+  let subscriptionCanceledAt: number | null | undefined;
+
+  const isSubscriber = listByEmail.data.some((customer, i) => {
+    const hasValidSubscription = customer.subscriptions?.data.some(
+      (subscription) => {
+        const secondsInTwoWeeks = 1209600;
+
+        subscriptionCanceledAt = subscription.canceled_at;
+
+        const isNotCanceledOrHasTime = !(
+          subscription.canceled_at &&
+          new Date() >
+            new Date((subscription.canceled_at + secondsInTwoWeeks) * 1000)
+        );
+
+        return (
+          subscription?.items?.data?.some(
+            (subscriptionItem) => subscriptionItem?.plan?.id === priceId
+          ) && isNotCanceledOrHasTime
+        );
+      }
+    );
+
+    return (
+      customer.email?.toLowerCase() === email.toLowerCase() &&
+      hasValidSubscription
+    );
+  });
+
+  return {
+    isSubscriber,
+    subscriptionCanceledAt,
+  };
+}