Greet and React Example

This example shows a fully functioning but very simple application using the Slack Event Adapter.

Setup

Create an app at api.slack.com/apps
Click on Bot Users on the left side navigation
Give your bot user a name (e.g. "@greetandreact"), turn Always Show My Bot as Online on, and save your changes

Get the code
- Either clone this repo and run npm install
- Or visit glitch.com/edit/#!/remix/slack-greet-and-react-example
Set the following environment variables (all available on the Basic Information page) to .env (see .env.sample if you're developing locally)
- SLACK_CLIENT_ID: You app's Client ID
- SLACK_CLIENT_SECRET: Your app's Client Secret
- SLACK_VERIFICATION_TOKEN: Your app's Verification Token
If you're running the app locally:
- Start the app (node index.js)
- In another window, start ngrok on the same port as your webserver (ngrok http $PORT)

Go back to the app settings and click on Event Subscriptions on the left side navigation
Enable events and enter your Request URL:
- ngrok or Glitch URL + /slack/events
After you set up the Request URL, you should add event subscriptions under the "Bot Events" category. Add message.channels and reaction_added.
Go to OAuth & Permissions item on the left side navigation, and input the Redirect URL:
- ngrok or Glitch URL + /auth/slack/callback

Visit the URL of your development proxy
- ngrok or Glitch URL
Click the "Add to Slack" button, and complete the installation
You can invite the Bot User into a channel (e.g. /invite @greetandreact), and say "hi" in the channel. It should respond to you. You can also add reactions to messages and the Bot User will send a message using the same emoji.