first commit

calcom/packages/app-store/stripepayment/api/callback.ts

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+import type { Prisma } from "@prisma/client";
+import type { NextApiRequest, NextApiResponse } from "next";
+import { stringify } from "querystring";
+
+import getInstalledAppPath from "../../_utils/getInstalledAppPath";
+import createOAuthAppCredential from "../../_utils/oauth/createOAuthAppCredential";
+import { decodeOAuthState } from "../../_utils/oauth/decodeOAuthState";
+import type { StripeData } from "../lib/server";
+import stripe from "../lib/server";
+
+function getReturnToValueFromQueryState(req: NextApiRequest) {
+  let returnTo = "";
+  try {
+    returnTo = JSON.parse(`${req.query.state}`).returnTo;
+  } catch (error) {
+    console.info("No 'returnTo' in req.query.state");
+  }
+  return returnTo;
+}
+
+export default async function handler(req: NextApiRequest, res: NextApiResponse) {
+  const { code, error, error_description } = req.query;
+  const state = decodeOAuthState(req);
+
+  if (error) {
+    // User cancels flow
+    if (error === "access_denied") {
+      state?.onErrorReturnTo ? res.redirect(state.onErrorReturnTo) : res.redirect("/apps/installed/payment");
+    }
+    const query = stringify({ error, error_description });
+    res.redirect(`/apps/installed?${query}`);
+    return;
+  }
+
+  if (!req.session?.user?.id) {
+    return res.status(401).json({ message: "You must be logged in to do this" });
+  }
+
+  const response = await stripe.oauth.token({
+    grant_type: "authorization_code",
+    code: code?.toString(),
+  });
+
+  const data: StripeData = { ...response, default_currency: "" };
+  if (response["stripe_user_id"]) {
+    const account = await stripe.accounts.retrieve(response["stripe_user_id"]);
+    data["default_currency"] = account.default_currency;
+  }
+
+  await createOAuthAppCredential(
+    { appId: "stripe", type: "stripe_payment" },
+    data as unknown as Prisma.InputJsonObject,
+    req
+  );
+
+  const returnTo = getReturnToValueFromQueryState(req);
+  res.redirect(returnTo || getInstalledAppPath({ variant: "payment", slug: "stripe" }));
+}