discord-webhook-filter-worker.js

/*
MIT License

Copyright (c) 2021 Lilly Rose Berner

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/

// Cloudflare Worker which filters GitHub webhook events before forwarding them to Discord
// Thanks to Joe / Python Discord for the idea: https://github.com/python-discord/workers/tree/main/github-filter-worker

const CLOUDFLARE_APP_ID = 85455;
const CLOUDFLARE_USER_ID = 73139402;

const DEPENDABOT_USER_ID = 49699333;

async function handleRequest({ request }) {
  const url = new URL(request.url);

  if (url.pathname === "/") {
    return new Response("Worker is active.", { status: 200 });
  }

  const { headers, method } = request;

  if (method !== "POST") {
    return new Response("Method not supported.", { status: 405 });
  }

  const data = await request.clone().json();
  const event = headers.get("X-GitHub-Event");

  // [Mousey] Deployed successfully on stardust
  const isCloudflareCheck =
    event === "check_run" &&
    data?.check_run?.conclusion === "success" &&
    data?.check_run?.check_suite?.app?.id === CLOUDFLARE_APP_ID;

  // [Mousey] Cloudflare Pages checks success on stardust
  const isCloudflareSuite =
    event === "check_suite" &&
    data?.check_suite?.conclusion === "success" &&
    data?.check_suite?.app?.id === CLOUDFLARE_APP_ID;

  // [LostLuma/Mousey] New comment on pull request #24: bot: bump hiredis from 1.1.0 to 2.0.0 in /packages/bot
  const isCloudflareComment = event === "issue_comment" && data?.sender?.id === CLOUDFLARE_USER_ID;

  // [Mousey:dependabot/pip/packages/bot/cryptography-3.4.7] 1 new commit
  // This does not ignore squashing commits to other branches - unsure about merging
  const isDependabotPush = event === "push" && data?.sender?.id === DEPENDABOT_USER_ID;

  // [LostLuma/Mousey] New branch created: dependabot/pip/packages/bot/cryptography-3.4.7
  const isDependabotBranchCreate =
    event === "create" && data?.ref_type === "branch" && data?.sender?.id === DEPENDABOT_USER_ID;

  // [LostLuma/Mousey] branch deleted: dependabot/pip/packages/api/cryptography-3.4.7
  const isDependabotBranchDelete =
    event === "delete" && data?.ref_type === "branch" && data?.sender?.id === DEPENDABOT_USER_ID;

  if (
    isCloudflareCheck ||
    isCloudflareSuite ||
    isCloudflareComment ||
    isDependabotPush ||
    isDependabotBranchCreate ||
    isDependabotBranchDelete
  ) {
    return new Response("Event intercepted and ignored.", { status: 200 });
  }

  return await fetch(`https://discord.com/api/webhooks${url.pathname}/github`, request);
}

addEventListener("fetch", (event) => {
  event.respondWith(handleRequest(event));
});

i made a simple php script to do this https://gist.github.com/hayden-t/e3a6a85d404897430188368fad53786a