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require "socket"

 

class IRCBot

  def initialize(options={})

    @server, @port, @channel, @nick, @password = options[:server], options[:port] || 6667, options[:channel], options[:nick], options[:password]

    @socket = TCPSocket.open(@server, @port)

   

    start

  end

 

  def connect

    ircsend("USER #{@nick} #{@nick} #{@nick} :#{@nick}")

    ircsend("NICK #{@nick}")

    #ircsend("NS ID #{@password}") if password?

    ircsend("JOIN #{@channel}")

  end

 

  def handle(s)

    puts s

 

    case s

      when /^PING\s(?<host>.+)/

        ircsend("PONG #{host}")

    end

  end

 

  def ircsend(s)

    @socket.print("#{s}\r\n")

    puts "*** #{s}"

  end

 

  def password?

    @password

  end

 

  def start

    connect

 

    loop do

      ready = IO.select([@socket], nil, nil, 10)

      next unless ready

     

      ready.first.each do |s|

        handle(@socket.gets.chomp) if @socket == s

        return if @socket.eof?

      end

    end

  end

end

 

IRCBot.new(

  server: "irc.freenode.net",

  nick: "Jimmy`",

  password: "watwat",

  channel: "#craiggles"

)