Per-channel webhook template

A bot that creates an incoming webhook URL for every channel it joins. Using the webhook URL, any user can set up integrations to post notifications into that channel.

Setup

Create a Slack app

1. Create an app at api.slack.com/apps
2. Click on Bot Users
3. Add a bot user (choose a username and enable 'Always Show My Bot as Online')
4. Click on Install App in the sidebar
5. Install the app and copy the xoxb- token

Run locally or

1. Get the code
   • Either clone this repo and run npm install
   • Or visit https://glitch.com/edit/#!/remix/slack-channel-webhook-blueprint
2. Set the following environment variables to .env (see .env.sample):
   • SLACK_TOKEN: Your app's xoxb- token value (available on the Install App page)
   • SLACK_VERIFICATION_TOKEN: Your app's verification token (available on the Basic Information page)
   • PORT: The port that you're running ngrok on
   • BASE_URL: Your ngrok URL
3. If you're running the app locally:
   1. Start the app (npm start)
   2. In another windown, start ngrok on the same port as your webserver (ngrok http $PORT)

Enable the Events API

1. Go back to the app settings and click on Events Subscriptions.
2. Set the Request URL to your ngrok or Glitch URL + /events
3. On the same page, subscribe to the member_joined_channel bot event

In Slack

1. Invite the bot into a channel. You should see a message posted with the webhook URL