Slack Ruby Bot Server Events Sample

• Slack Ruby Bot Server Events Sample
  • What is this?
  • Running the Sample
    • Settings
    • Install App
    • OAuth Scopes
    • Events
    • Slash Commands
    • Actions
    • Copyright & License

What is this?

A sample app that uses slack-ruby-bot-server-events to implement and respond to Slack Events API, Interactive Message Buttons and Slash Commands.

Running the Sample

Settings

Create .env file with the following settings.

SLACK_CLIENT_ID=...
SLACK_CLIENT_SECRET=...
SLACK_SIGNING_SECRET=...
SLACK_VERIFICATION_TOKEN=...

Get the values from from your app's Basic Information settings.

Run bundle install and foreman start.

Install App

Register your app via OAuth workflow from localhost:5000.

Expose the local server port 5000 to receive Slack events using ngrok.

ngrok http 5000

Copy the URL, e.g. https://79f0f6335438.ngrok.io, and use it as the prefix for your events, slash commands, and interactive message buttons.

OAuth Scopes

See config/initializers/slack_ruby_bot_server.rb for the required OAuth scopes. If you get Slack::Web::Api::Errors::MissingScope: missing_scope errors, you are missing a scope in your app configuration.

Events

Set the Request Url in your app's Features under Event Subscriptions, e.g. https://79f0f6335438.ngrok.io/api/slack/event. When you change this URL, Slack will POST a verification challenge to /api/slack/event, which should succeed.

Subscribe to member_joined_channel and member_left_channel events.

Invite the bot to a channel. Add/remove some other members. The welcome message is posted from lib/events/member_joined_channel.rb every time a user joins.

A default handler is also fired on all other events in lib/events/default.rb producing log output.

11:49:56 web.1  | I, [2020-07-19T11:49:56.933931 #72370]  INFO -- : Successfully connected team dblock (T04KB5WQH) to https://dblockdotorg.slack.com.
11:53:10 web.1  | I, [2020-07-19T11:53:10.607301 #72370]  INFO -- : User test_app joined events.
11:53:17 web.1  | I, [2020-07-19T11:53:17.786968 #72370]  INFO -- : User dblockplayplay joined events.

Slash Commands

Create a /ping Slash command. Set the Request URL, e.g. https://79f0f6335438.ngrok.io/api/slack/command.

There's no need to invite the bot to a channel. Try /ping, the bot will respond with pong from lib/slash_commands/ping.rb.

A default handler is also fired on all other slash commands in lib/slash_commands/default.rb producing log output.

20:17:02 web.1  | I, [2020-07-19T20:17:02.678409 #77259]  INFO -- : Successfully connected team dblock (T04KB5WQH) to https://dblockdotorg.slack.com.
20:17:05 web.1  | I, [2020-07-19T20:17:05.703699 #77259]  INFO -- : Received a ping.

Actions

Set the Request Url in your app's Features under Interactivity & Shortcuts, e.g. https://79f0f6335438.ngrok.io/api/slack/action. Create an "on messages" shortcut, set the ID to count-letters.

There's no need to invite the bot to a channel. Choose the "Count Letters" shortcut, the bot will respond with an ephemeral message from lib/actions/count_letters.rb.

A default handler is also fired on all other actions in lib/actions/default.rb producing log output.

23:42:21 web.1  | I, [2020-07-19T23:42:21.394965 #78955]  INFO -- : Successfully connected team dblock (T04KB5WQH) to https://dblockdotorg.slack.com.
23:43:43 web.1  | I, [2020-07-19T23:43:43.978877 #78955]  INFO -- : Counting letters in "The red brown fox jumped over a lazy dog."

Copyright & License

Copyright Daniel Doubrovkine, 2020

MIT License