A quick example of a Twitch chat bot using Ruby.

twitch_bot.rb

# A quick example of a Twitch chat bot in Ruby.
# No third party libraries. Just Ruby standard lib.
#
# See the tutorial video: https://www.youtube.com/watch?v=_FbRcZNdNjQ
#

# You can fill in creds here or use environment variables if you choose.
TWITCH_CHAT_TOKEN = ENV['TWITCH_CHAT_TOKEN']
TWITCH_USER       = ENV['TWITCH_USER']

require 'socket'
require 'logger'

Thread.abort_on_exception = true

class Twitch
  attr_reader :logger, :running, :socket

  def initialize(logger = nil)
    @logger  = logger || Logger.new(STDOUT)
    @running = false
    @socket  = nil
  end

  def send(message)
    logger.info "< #{message}"
    socket.puts(message)
  end

  def run
    logger.info 'Preparing to connect...'

    @socket = TCPSocket.new('irc.chat.twitch.tv', 6667)
    @running = true

    socket.puts("PASS #{TWITCH_CHAT_TOKEN}")
    socket.puts("NICK #{TWITCH_USER}")

    logger.info 'Connected...'

    Thread.start do
      while (running) do
        ready = IO.select([socket])

        ready[0].each do |s|
          line    = s.gets
          match   = line.match(/^:(.+)!(.+) PRIVMSG #(\w+) :(.+)$/)
          message = match && match[4]

          if message =~ /^!hello/
            user = match[1]
            logger.info "USER COMMAND: #{user} - !hello"
            send "PRIVMSG #open_mailbox :Hello, #{user} from Mailbot!"
          end

          logger.info "> #{line}"
        end
      end
    end
  end

  def stop
    @running = false
  end
end

if TWITCH_CHAT_TOKEN.empty || TWITCH_USER.empty?
  puts "You need to fill in your own Twitch credentials!"
  exit(1)
end

bot = Twitch.new
bot.run

while (bot.running) do
  command = gets.chomp

  if command == 'quit'
    bot.stop
  else
    bot.send(command)
  end
end

puts 'Exited.'

https://gist.github.com/nevern02/98bdc9701e2741f4cb3b0b47f3d2c429#file-twitch_bot-rb-L67 Hey in line 67, don't forget the question mark on empty.

Thanks for posting this, its super helpful. So after you put the username and token it will output to their channel?

🌊!

Your code is amazing. Please put a license on this :>