first

.gitignore

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+.env

Gemfile

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+# frozen_string_literal: true
+
+source "https://rubygems.org"
+
+gem 'slack-ruby-client'
+
+gem 'celluloid-io', require: ['celluloid/current', 'celluloid/io']
+
+gem 'dotenv'

Gemfile.lock

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+GEM
+  remote: https://rubygems.org/
+  specs:
+    activesupport (5.2.0)
+      concurrent-ruby (~> 1.0, >= 1.0.2)
+      i18n (>= 0.7, < 2)
+      minitest (~> 5.1)
+      tzinfo (~> 1.1)
+    celluloid (0.17.3)
+      celluloid-essentials
+      celluloid-extras
+      celluloid-fsm
+      celluloid-pool
+      celluloid-supervision
+      timers (>= 4.1.1)
+    celluloid-essentials (0.20.5)
+      timers (>= 4.1.1)
+    celluloid-extras (0.20.5)
+      timers (>= 4.1.1)
+    celluloid-fsm (0.20.5)
+      timers (>= 4.1.1)
+    celluloid-io (0.17.3)
+      celluloid (>= 0.17.2)
+      nio4r (>= 1.1)
+      timers (>= 4.1.1)
+    celluloid-pool (0.20.5)
+      timers (>= 4.1.1)
+    celluloid-supervision (0.20.6)
+      timers (>= 4.1.1)
+    concurrent-ruby (1.0.5)
+    dotenv (2.4.0)
+    faraday (0.15.0)
+      multipart-post (>= 1.2, < 3)
+    faraday_middleware (0.12.2)
+      faraday (>= 0.7.4, < 1.0)
+    gli (2.17.1)
+    hashie (3.5.7)
+    hitimes (1.2.6)
+    i18n (1.0.1)
+      concurrent-ruby (~> 1.0)
+    minitest (5.11.3)
+    multipart-post (2.0.0)
+    nio4r (2.3.0)
+    slack-ruby-client (0.11.1)
+      activesupport
+      faraday (>= 0.9)
+      faraday_middleware
+      gli
+      hashie
+      websocket-driver
+    thread_safe (0.3.6)
+    timers (4.1.2)
+      hitimes
+    tzinfo (1.2.5)
+      thread_safe (~> 0.1)
+    websocket-driver (0.7.0)
+      websocket-extensions (>= 0.1.0)
+    websocket-extensions (0.1.3)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  celluloid-io
+  dotenv
+  slack-ruby-client
+
+BUNDLED WITH
+   1.16.1

Procfile

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+worker: bundle exec ruby typing.rb

typing.rb

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+require 'dotenv/load'
+require 'slack-ruby-client'
+
+raise 'Missing ENV[SLACK_API_TOKENS]!' unless ENV.key?('SLACK_API_TOKENS')
+
+$stdout.sync = true
+logger = Logger.new($stdout)
+logger.level = Logger::DEBUG
+
+ENV['SLACK_API_TOKENS'].split.each do |token|
+  logger.info "Starting #{token[0..12]} ..."
+
+  client = Slack::RealTime::Client.new(token: token)
+
+  client.on :hello do
+    logger.info "Successfully connected, welcome '#{client.self.name}' to the '#{client.team.name}' team at https://#{client.team.domain}.slack.com."
+  end
+
+  client.on(:user_typing) do |data|
+    logger.info data
+    client.typing channel: data.channel
+    #client.message channel: data.channel, text: "What are you typing <@#{data.user}>?"
+  end
+
+  client.start_async
+end
+
+loop do
+  Thread.pass
+end