feat: stripe handlers and fetchers

packages/lib/stripe/handlers/portal-session.ts

@@ -1 +1,53 @@
-export 
+import { NextApiRequest, NextApiResponse } from "next";
+import { stripe } from "../index";
+
+export type PortalSessionRequest = {
+  body: {
+    id: string;
+  };
+};
+
+export type PortalSessionResponse =
+  | {
+      success: false;
+      message: string;
+    }
+  | {
+      success: true;
+      url: string;
+    };
+
+export const portalSessionHandler = async (req: NextApiRequest, res: NextApiResponse<PortalSessionResponse>) => {
+  if (!process.env.NEXT_PUBLIC_ALLOW_SUBSCRIPTIONS) {
+    return res.status(500).json({
+      success: false,
+      message: "Subscriptions are not enabled",
+    });
+  }
+
+  if (req.method !== "POST") {
+    return res.status(405).json({
+      success: false,
+      message: "Method not allowed",
+    });
+  }
+
+  const { id } = req.body;
+
+  if (typeof id !== "string") {
+    return res.status(400).json({
+      success: false,
+      message: "No id found in request",
+    });
+  }
+
+  const session = await stripe.billingPortal.sessions.create({
+    customer: id,
+    return_url: `${process.env.NEXT_PUBLIC_BASE_URL}/settings/billing`,
+  });
+
+  return res.status(200).json({
+    success: true,
+    url: session.url,
+  });
+};