feat: stripe handlers and fetchers

packages/lib/stripe/handlers/get-subscription.ts

@@ -0,0 +1,63 @@
+import { NextApiRequest, NextApiResponse } from "next";
+import prisma from "@documenso/prisma";
+import { Subscription } from "@prisma/client";
+import { getToken } from "next-auth/jwt";
+
+export type GetSubscriptionRequest = never;
+
+export type GetSubscriptionResponse =
+  | {
+      success: false;
+      message: string;
+    }
+  | {
+      success: true;
+      subscription: Subscription;
+    };
+
+export const getSubscriptionHandler = async (req: NextApiRequest, res: NextApiResponse) => {
+  if (!process.env.NEXT_PUBLIC_ALLOW_SUBSCRIPTIONS) {
+    return res.status(500).json({
+      success: false,
+      message: "Subscriptions are not enabled",
+    });
+  }
+
+  if (req.method !== "GET") {
+    return res.status(405).json({
+      success: false,
+      message: "Method not allowed",
+    });
+  }
+
+  const token = await getToken({
+    req,
+  });
+
+  if (!token || !token.email) {
+    return res.status(401).json({
+      success: false,
+      message: "Unauthorized",
+    });
+  }
+
+  const subscription = await prisma.subscription.findFirst({
+    where: {
+      User: {
+        email: token.email,
+      },
+    },
+  });
+
+  if (!subscription) {
+    return res.status(404).json({
+      success: false,
+      message: "No subscription found",
+    });
+  }
+
+  return res.status(200).json({
+    success: true,
+    subscription,
+  });
+};