wolfram_irc_bot.rb

#!/usr/bin/env ruby
require 'cinch' # gem install cinch
require 'wolfram-alpha' #  gem install wolfram-alpha

options = { "format" => "plaintext" }
APP_ID = 'XXXXXXXXXXXXXXXX' # get your AppID from http://products.wolframalpha.com/api
client = WolframAlpha::Client.new APP_ID, options
bot_name = 'WolframBot'

bot = Cinch::Bot.new do
  configure do |c|

    c.server = "irc.freenode.org"
    c.nick = bot_name
    c.channels = ["##pmg", "#mashhadlug"]
    
  end

  on :message do |m|
    if m.message.start_with? bot_name
      begin
        query = m.message.gsub(/#{bot_name}[\W+]/,'').strip
        response = client.query(query)
        # Just some prefered PODs
        result = response.map { |pod| (['Result', 'Results', 'Definitions', 'Basic information', 'Definition', 'Notable facts'].include? pod.title) ? pod : nil }.compact
        
        # If none of prefered PODs found, just return second and third ones
        if result.empty?
          result = response.to_a[1..2]
        end
        
        m.reply(response["Input"].subpods[0].plaintext, true)
        result.each do |pod|
          m.reply(pod.subpods[0].plaintext, true)
        end
      rescue NoMethodError
        m.reply('Nothing Found', true)
      end
    end
  end
end

bot.start