Deno script that can be deployed to https://deno.com/deploy and registered as a bitbucket webhook to notifiy new PRs in a MS Teams channel.

bitbucket-to-teams-webhook.js

import { Application, Router } from 'https://deno.land/x/oak/mod.ts';

// Load environment variables
const PORT = 8080;
const TEAMS_WEBHOOK_URL = 'https://XYZ.webhook.office.com/webhookb2/XYZ';
const TARGET_USERNAME = 'xyz';

if (!TEAMS_WEBHOOK_URL || !TARGET_USERNAME) {
  throw new Error('Missing required environment variables.');
}

// Create a function to send a message to a Microsoft Teams channel
async function sendTeamsMessage(text: string) {
  const response = await fetch(TEAMS_WEBHOOK_URL, {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
    },
    body: JSON.stringify({
      '@type': 'MessageCard',
      '@context': 'http://schema.org/extensions',
      text: text,
    }),
  });

  if (!response.ok) {
    throw new Error('Failed to send message to MS Teams.');
  }
}

const router = new Router();

router.post('/webhook', async (context) => {
  const requestBody = await context.request.body({ type: 'json' }).value;
  console.log('got request', requestBody);
  const eventType = requestBody.eventKey;
  const pullRequest = requestBody.pullRequest;
  const authorUsername = pullRequest?.author?.user?.name;

  if (eventType === 'pr:opened' && authorUsername === TARGET_USERNAME) {
    const title = pullRequest.title;
    const url = pullRequest.links?.self?.[0]?.href;

    await sendTeamsMessage(
      `Please Review: [${title}](${url}) LG Daniel`
    );
    context.response.status = 200;
    context.response.body = { success: true };
  } else {
    context.response.status = 200;
    context.response.body = { success: false };
  }
});

const app = new Application();
app.use(router.routes());
app.use(router.allowedMethods());

console.log(`Listening on port ${PORT}`);
await app.listen({ port: PORT });