Class: SlackKeepPresence::Main

Inherits:
Object
  • Object
show all
Defined in:
lib/slack_keep_presence.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options) ⇒ Main

Returns a new instance of Main.



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# File 'lib/slack_keep_presence.rb', line 11

def initialize(options)
  @logger = Logger.new(STDOUT)
  @logger.level = options[:debug] ? Logger::DEBUG : Logger::INFO
  @client = Slack::Client.new(token: ENV['SLACK_TOKEN'])

  get_user
  keep_presence
end

Instance Attribute Details

#client ⇒ Object

Returns the value of attribute client.



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# File 'lib/slack_keep_presence.rb', line 9

def client
  @client
end

#logger ⇒ Object

Returns the value of attribute logger.



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# File 'lib/slack_keep_presence.rb', line 9

def logger
  @logger
end

#should_shutdown ⇒ Object

Returns the value of attribute should_shutdown.



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# File 'lib/slack_keep_presence.rb', line 9

def should_shutdown
  @should_shutdown
end

#user ⇒ Object

Returns the value of attribute user.



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# File 'lib/slack_keep_presence.rb', line 9

def user
  @user
end

#ws ⇒ Object

Returns the value of attribute ws.



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# File 'lib/slack_keep_presence.rb', line 9

def ws
  @ws
end

Instance Method Details

#clean_shutdown ⇒ Object 



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# File 'lib/slack_keep_presence.rb', line 32

def clean_shutdown
  puts 'Shutting down...'
  @should_shutdown = true;
  ws.close;
  EM.stop;
  exit
end

#get_user ⇒ Object 



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# File 'lib/slack_keep_presence.rb', line 20

def get_user
  auth = client.auth_test

  if !auth['ok']
    logger.info('Unable to authenticate')
    exit(1)
  end

  @user = auth['user_id']
  logger.info("Authenticated as #{user}")
end

#keep_presence ⇒ Object 



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# File 'lib/slack_keep_presence.rb', line 40

def keep_presence
  Signal.trap("INT")  { clean_shutdown }
  Signal.trap("TERM") { clean_shutdown }

  EM.run do
    start_realtime

    EM.add_periodic_timer(5) do
      next unless ws

      timeouter = EventMachine::Timer.new(2) do
        logger.info('Connection to Slack terminated, reconnecting...')
        restart_connection
      end

      ws.ping('detecting presence') do
        timeouter.cancel
      end
    end
  end
end

#restart_connection ⇒ Object 



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# File 'lib/slack_keep_presence.rb', line 118

def restart_connection
  @should_shutdown = true
  @ws&.close
  @ws = nil
  begin
    start_realtime
  rescue Faraday::ConnectionFailed, Faraday::TimeoutError
    logger.info('Failed to establish connection, retrying...')
    sleep 5
    retry
  end
end

#set_presence_active ⇒ Object 



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# File 'lib/slack_keep_presence.rb', line 131

def set_presence_active
  res = client.users_setPresence(presence: 'auto', set_active: true)
  logger.debug(res)
end

#start_realtime ⇒ Object 



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# File 'lib/slack_keep_presence.rb', line 62

def start_realtime
  @should_shutdown = false

  rtm = client.post("rtm.connect", batch_presence_aware: true)
  ws_url = rtm['url']

  @ws = Faye::WebSocket::Client.new(ws_url, nil, ping: 30)

  ws.on :open do |event|
    logger.info('Connected to Slack RealTime API')

    payload = {
      type: 'presence_sub',
      ids: [user]
    }

    ws.send(payload.to_json)

    res = client.users_getPresence(user: user)
    logger.debug "#{res}"
  end

  ws.on :message do |event|
    data = JSON.parse(event.data)

    if data['type'] == 'presence_change'
      logger.debug("Got event: #{event.data}")
      next unless data['user'] == user
      next unless data['presence'] == 'away'

      # get the status to make sure this isn't manual_away
      away_info = client.users_getPresence(user: user)
      logger.debug(away_info)

      if away_info['manual_away']
        logger.info('User marked as manual_away, skipping')
        next
      end

      logger.info("Presence changed to #{data['presence']}")

      logger.info("Marking #{user} as active")
      set_presence_active
      restart_connection
    end
  end

  ws.on [:close, :error] do |event|
    next if should_shutdown

    logger.debug('Connection to Slack RealTime API terminated, reconnecting')
    sleep 5
    start_realtime
  end
end