first commit

calcom/packages/app-store/basecamp3/api/add.ts

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+import type { NextApiRequest } from "next";
+import { stringify } from "querystring";
+
+import { WEBAPP_URL } from "@calcom/lib/constants";
+import { defaultHandler, defaultResponder } from "@calcom/lib/server";
+import prisma from "@calcom/prisma";
+
+import { getBasecampKeys } from "../lib/getBasecampKeys";
+
+async function handler(req: NextApiRequest) {
+  await prisma.user.findFirstOrThrow({
+    where: {
+      id: req.session?.user?.id,
+    },
+    select: {
+      id: true,
+    },
+  });
+
+  const { client_id } = await getBasecampKeys();
+
+  const params = {
+    type: "web_server",
+    client_id,
+  };
+  const query = stringify(params);
+  const url = `https://launchpad.37signals.com/authorization/new?${query}&redirect_uri=${WEBAPP_URL}/api/integrations/basecamp3/callback`;
+  return { url };
+}
+
+export default defaultHandler({
+  GET: Promise.resolve({ default: defaultResponder(handler) }),
+});

calcom/packages/app-store/basecamp3/api/callback.ts

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+import type { NextApiRequest, NextApiResponse } from "next";
+
+import { WEBAPP_URL } from "@calcom/lib/constants";
+import prisma from "@calcom/prisma";
+
+import getAppKeysFromSlug from "../../_utils/getAppKeysFromSlug";
+import getInstalledAppPath from "../../_utils/getInstalledAppPath";
+import { decodeOAuthState } from "../../_utils/oauth/decodeOAuthState";
+import appConfig from "../config.json";
+
+export default async function handler(req: NextApiRequest, res: NextApiResponse) {
+  const { code } = req.query;
+  const { client_id, client_secret, user_agent } = await getAppKeysFromSlug("basecamp3");
+
+  const redirectUri = `${WEBAPP_URL}/api/integrations/basecamp3/callback`;
+
+  const params = new URLSearchParams({
+    type: "web_server",
+    client_id: client_id as string,
+    client_secret: client_secret as string,
+    redirect_uri: redirectUri,
+    code: code as string,
+  });
+  // gets access token
+  const accessTokenResponse = await fetch(
+    `https://launchpad.37signals.com/authorization/token?${params.toString()}`,
+    {
+      method: "POST",
+    }
+  );
+
+  if (accessTokenResponse.status !== 200) {
+    let errorMessage = "Error with Basecamp 3 API";
+    try {
+      const responseBody = await accessTokenResponse.json();
+      errorMessage = responseBody.error;
+    } catch (e) {}
+
+    res.status(400).json({ message: errorMessage });
+    return;
+  }
+
+  const tokenResponseBody = await accessTokenResponse.json();
+
+  if (tokenResponseBody.error) {
+    res.status(400).json({ message: tokenResponseBody.error });
+    return;
+  }
+  // expiry date of 2 weeks
+  tokenResponseBody["expires_at"] = Date.now() + 1000 * 3600 * 24 * 14;
+  // get user details such as projects and account info
+  const userAuthResponse = await fetch("https://launchpad.37signals.com/authorization.json", {
+    headers: {
+      "User-Agent": user_agent as string,
+      Authorization: `Bearer ${tokenResponseBody.access_token}`,
+    },
+  });
+  if (userAuthResponse.status !== 200) {
+    let errorMessage = "Error with Basecamp 3 API";
+    try {
+      const body = await userAuthResponse.json();
+      errorMessage = body.error;
+    } catch (e) {}
+
+    res.status(400).json({ message: errorMessage });
+    return;
+  }
+
+  const authResponseBody = await userAuthResponse.json();
+  const userId = req.session?.user.id;
+  if (!userId) {
+    return res.status(404).json({ message: "No user found" });
+  }
+
+  await prisma.user.update({
+    where: {
+      id: req.session?.user.id,
+    },
+    data: {
+      credentials: {
+        create: {
+          type: appConfig.type,
+          key: { ...tokenResponseBody, account: authResponseBody.accounts[0] },
+          appId: appConfig.slug,
+        },
+      },
+    },
+  });
+
+  const state = decodeOAuthState(req);
+
+  res.redirect(getInstalledAppPath({ variant: appConfig.variant, slug: appConfig.slug }));
+}

calcom/packages/app-store/basecamp3/api/index.ts

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+export { default as add } from "./add";
+export { default as callback } from "./callback";