first commit

calcom/packages/app-store/zohocalendar/api/add.ts

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+import type { NextApiRequest, NextApiResponse } from "next";
+import { stringify } from "querystring";
+
+import { WEBAPP_URL } from "@calcom/lib/constants";
+import { defaultHandler, defaultResponder } from "@calcom/lib/server";
+
+import getAppKeysFromSlug from "../../_utils/getAppKeysFromSlug";
+import { encodeOAuthState } from "../../_utils/oauth/encodeOAuthState";
+import config from "../config.json";
+import { appKeysSchema as zohoKeysSchema } from "../zod";
+
+const OAUTH_BASE_URL = "https://accounts.zoho.com/oauth/v2";
+
+async function getHandler(req: NextApiRequest, res: NextApiResponse) {
+  const appKeys = await getAppKeysFromSlug(config.slug);
+  const { client_id } = zohoKeysSchema.parse(appKeys);
+
+  const state = encodeOAuthState(req);
+
+  const params = {
+    client_id,
+    response_type: "code",
+    redirect_uri: `${WEBAPP_URL}/api/integrations/zohocalendar/callback`,
+    scope: [
+      "ZohoCalendar.calendar.ALL",
+      "ZohoCalendar.event.ALL",
+      "ZohoCalendar.freebusy.READ",
+      "AaaServer.profile.READ",
+    ],
+    access_type: "offline",
+    state,
+    prompt: "consent",
+  };
+
+  const query = stringify(params);
+
+  res.status(200).json({ url: `${OAUTH_BASE_URL}/auth?${query}` });
+}
+
+export default defaultHandler({
+  GET: Promise.resolve({ default: defaultResponder(getHandler) }),
+});