Ruby IRC Client. Very basic. No support for IRC commands, yet... Will expand into a full repo/app.

irc.rb

require 'socket'
include Socket::Constants

class Client
  
  def initialize(settings, channel)
    @settings = settings
    @channel = channel
    
    @connection = TCPSocket.open(@settings['server'], @settings['port'])
    
    send("NICK #{@settings['name']}")
    send("USER #{@settings['name']} localhost * :#{@settings['name']}")
    puts "Connecting..."
  end
   
  def send(a)
    @connection.puts a
  end
  
  def basic_parse(msg)
    # sends ping reply to tell the server connection is alive
    if msg.match(/^PING :(.*)$/)
        send("PONG #{$~[1]}")
    end
      
    # if message from another user, parse to have user: message pretty stuff
    if msg.match(/^:(.*)!(.*) PRIVMSG (.*) :(.*) :(.*)$/)
        puts "#{$~[1]}: #{$~[4]} :#{$~[5]}"
        new_line
    elsif msg.match(/^:(.*)!(.*) PRIVMSG (.*) :(.*)$/)
        puts "#{$~[1]}: #{$~[4]}"
        new_line
    end

    # waits for a line with the user authed by NICK
    if msg.match(/^:(.*) (.*) #{@settings['name']} :(.*)$/)
        send("JOIN #{@channel}")
        print("#{msg}")
        if $~[2] == "266"
          print("Connected to #{@channel} \n--> ")
        end
    end
    
  end
  
  def input_stdin!
    if input = STDIN.gets
         unless input.match(/^PRIVMSG(.*)$/)
           if input.match(/^JOIN (.*)$/)
              send("JOIN #{$~[1]}")
           elsif input.match(/^NAMES$/)
              send("NAMES")
           else         
             send("PRIVMSG #{@channel} :#{input}")
             new_line
           end
         end
      end
  end
  
  def output_stdout!
    msg = @connection.gets
    basic_parse(msg)
  end
  
  def new_line
    print("--> ")
  end
  
  def run 
      until @connection.eof? do
        
        inou = select([@connection, STDIN], nil, nil, nil)
            next if !inou
              for s in inou[0]
                
                Thread.abort_on_exception = true
                stdin_thread = Thread.new do
                  if s = STDIN
                    input_stdin!
                  end
                end
                        
                Thread.abort_on_exception = true
                stdout_thread = Thread.new do
                  if s = @connection
                    output_stdout!
                  end
                end
            end
      end
  end
  
end
settings = {
 "name" => "scott_cli",
 "server" => "irc.weareinfinite.net",
 "port" => 6667
 }
channel = "#test"

client = Client.new(settings, channel)
client.run()

beautiful!