bot.rb

#!/usr/bin/env ruby
require 'rubygems'
require 'xmpp4r'
require 'xmpp4r/muc/helper/simplemucclient'

# Most of this is borrowed from https://gist.github.com/941931
# Added support for multiple rooms and external handling of messages.

# We want the MUC functionality to just handle shit for us.  Unfortunately we
# have to override/repeat the join method in order to add the directive that
# will disable the history being sent to us. :-(
module Jabber
  module MUC
    class MUCClient

      def join(jid, password=nil)
        if active?
          raise "MUCClient already active"
        end

        @jid = (jid.kind_of?(JID) ? jid : JID.new(jid))
        activate

        # Joining
        pres = Presence.new
        pres.to = @jid
        pres.from = @my_jid
        xmuc = XMUC.new
        xmuc.password = password
        pres.add(xmuc)

        # NOTE: Adding 'maxstanzas="0"' to 'history' subelement of xmuc nixes
        # the history being sent to us when we join.
        history = XMPPElement.new('history')
        history.add_attributes({'maxstanzas' => '0'})
        xmuc.add(history)

        # We don't use Stream#send_with_id here as it's unknown
        # if the MUC component *always* uses our stanza id.
        error = nil
        @stream.send(pres) { |r|
          if from_room?(r.from) and r.kind_of?(Presence) and r.type == :error
            # Error from room
            error = r.error
            true
            # type='unavailable' may occur when the MUC kills our previous instance,
            # but all join-failures should be type='error'
          elsif r.from == jid and r.kind_of?(Presence) and r.type != :unavailable
            # Our own presence reflected back - success
            if r.x(XMUCUser) and (i = r.x(XMUCUser).items.first)
              @affiliation = i.affiliation  # we're interested in if it's :owner
              @role = i.role                # :moderator ?
            end

            handle_presence(r, false)
            true
          else
            # Everything else
            false
          end
        }

        if error
          deactivate
          raise ServerError.new(error)
        end

        self
      end

    end
  end
end


class Bot

  attr_accessor :config, :client, :mucs

  def initialize(config)
    self.config = config
    self.client = Jabber::Client.new(config[:jid])

    self.mucs = {}
    config[:rooms].each { |name, jid|
      self.mucs[name] = Jabber::MUC::SimpleMUCClient.new(client)
    }

    if Jabber.logger = config[:debug]
      Jabber.debug = true
    end

    self
  end

  def connect
    client.connect
    client.auth(config[:password])
    client.send(Jabber::Presence.new.set_type(:available))
   
    self.mucs.each do |room, muc|
      muc.on_message do |time, nick, text|
        next if nick == config[:nick]
        yield room, nick, text
      end

      muc.join(self.config[:rooms][room] + '/' + config[:nick])
    end

    self
  end

  def send_message(room, msg)
    if msg[0, 6] == '/topic'
      msg = msg.split('/topic').last.strip
      message = Jabber::Message.new(muc.room)
      message.subject = msg
      muc.send message
    else
      muc.send Jabber::Message.new(muc.room, msg)
    end
  end

end


bot = Bot.new({
   	  :server   => 'conf.hipchat.com',
   	  :rooms    => { :dev  => '[email protected]',
                         :shared => '[email protected]' },
   	  :nick     => '...',
   	  :jid      => '[email protected]',
   	  :password => '...'
   	  })

bot.connect { |room, nick, message| 
  bot.send_message(room, "Got message from #{nick} in #{room}: #{message}")
}

loop do
  sleep 1
end