This example is a Hubot script that messages a chat room when a Facebook Page post is published using Facebook's Graph API Webhooks. The message includes a link to the Facebook post. The bot will post another message with the number of likes on the post after a configurable number of minutes.

These instructions assume you have already set up Hubot on Heroku or Hubot on another platform.

1. Download graph-api-webhooks.coffee.
2. Add a line to hubot-scripts.json with graph-api-webhooks.
3. Create a new Facebook application and/or register an Instagram API client.
4. Using token as the verify_token, set up your Facebook application's Graph API Webhooks subscription using https://<your-subdomain>.herokuapp.com/facebook as the callback URL, and/or your Instagram client's subscription using your https://<your-subdomain>.herokuapp.com/instagram as the callback URL.
5. Set the Heroku configuration values defined at the top of graph-api-webhooks.coffee before deploying.
   • FACEBOOK_APP_ACCESS_TOKEN - access token for your Facebook app
   • REAL_TIME_ROOM - chat room for Hubot to post in
   • WAIT_MINUTES - number of minutes to wait before retrieving the number of likes on the post
6. Install the Facebook app on your Facebook Page using the Page subscribed apps endpoint.