1  
   2  git clone git://github.com/ln/xmpp4r.git xmpp4r
   3  cd xmpp4r
   4  rake gem:install
   5  sudo gem install xmpp4r-simple

   1  
   2  require 'rubygems'  
   3  require 'xmpp4r-simple'
   4  messenger = Jabber::Simple.new('my-bot@gmail.com', "bot-password")

   1  
   2  messenger.deliver("a-real-person@gmail.com", "Why hello there Mr. Person, your bot is here now!") 

   1  
   2  while true
   3    messenger.received_messages do |msg|  
   4      puts msg.body  
   5      messenger.deliver("a-real-person@gmail.com", "Got your message, thanks!")  
   6    end  
   7    sleep 2  
   8  end

   1  
   2  require 'rubygems'  
   3  require 'xmpp4r-simple'
   4  messenger = Jabber::Simple.new('my-bot@gmail.com', "bot-password")
   5  while true
   6    messenger.received_messages do |msg|
   7      user = User.find_by_im_name(msg.from)
   8      if user
   9        case msg.body
  10        when /^help /i
  11          messenger.deliver(msg.from, "Valid commands are......")  
  12        when /^status /i
  13          user.status = msg.body.sub(/^status /i)
  14          user.save
  15          messenger.deliver(msg.from, "Thanks #{user.first_name}, your status has been updated")  
  16        when /^balance\?/i
  17          messenger.deliver(msg.from, "#{user.first_name}, your current remaining balance is #{user.remaining_balance}")  
  18        else
  19          messenger.deliver(msg.from, "Sorry #{user.first_name}, I didn't understand that. Message me with 'help' for a list of commands")  
  20        end
  21      else
  22        messenger.deliver(msg.from, "Sorry, but we've not got this account registered on our system. Sign-up or update your details at http://www.mysite.com/")  
  23      end    
  24    end  
  25    sleep 2  
  26  end