wwdc2010.rb

# in 2010 by Johannes Fahrenkrug, http://springenwerk.com
# See you at WWDC!

require 'rubygems'
require 'open-uri'

class WWDC2010
  def self.announced?
    title = open('http://developer.apple.com/wwdc') do |f|
      f.detect { |line| line =~ /<title>/ }
    end
    !!title && title !~ /2009/
  end
  
  def self.speak
    line = "Rejoice, all you people: WWDC 2010 has been announced!"
    if defined? NSSpeechSynthesizer
      ns = NSSpeechSynthesizer.new
      ns.voice = "com.apple.speech.synthesis.voice.GoodNews"
      ns.startSpeakingString(line)
    else
      system("say -v \"Good News\" \"#{line}\"")
    end
  end
end

if defined? NSObject
  require 'hotcocoa'

  class Application
    include HotCocoa

    def start
      @firstrun = true
      application(:name => "WWDC 2010") do |app|
        app.delegate = self
        window(:frame => [100, 100, 300, 200], :title => "WWDC 2010 - springenwerk.com", :background_color => color(:name => :black)) do |win|          
          win << result_field
          win << last_checked_field
          win << label(:text => "Has WWDC 2010 been announced yet?", :text_color => color(:name => :white))
          win.will_close { exit }
        end
        start_polling(0.5, false)
      end
    end

    private 
    
      def start_polling(seconds = 10, should_repeat = true)
        # so MRI doesn't complain
        eval("NSTimer.scheduledTimerWithTimeInterval(seconds, target:self, selector:'update:', userInfo:nil, repeats:should_repeat)")
      end
      
      def result_field
        @result_field ||= label(:text => "Nope.", :font => font(:name => "Tahoma", :size => 90), :text_color => color(:name => :red), :text_align => :left)
      end
      
      def last_checked_field
        @last_checkd_field ||= label(:text => "Checking...           ", :font => font(:name => "Tahoma", :size => 10), :text_color => color(:name => :gray), :text_align => :left)
      end
    
      def update(timer = nil)
        timestr = Time.now.localtime.strftime("at %I:%M:%S%p")
        if WWDC2010.announced?
          timer.invalidate if timer
          result_field.text = 'YES!'
          result_field.textColor = color(:name => :green)
          last_checked_field.text = timestr
          WWDC2010.speak
        else
          result_field.text = 'Nope.'
          result_field.textColor = color(:name => :red)
          last_checked_field.text = timestr
          if @firstrun
            @firstrun = false
            timer.invalidate if timer
            start_polling
          end
        end
      end
  end

  Application.new.start
else
  while true
    print Time.now.localtime.strftime("At %I:%M:%S%p WWDC 2010 has...")
    if WWDC2010.announced?
      print " BEEN ANNOUNCED!!!\n"
      WWDC2010.speak
      break
    else
      print " not been announced yet :(\n"
    end
    
    sleep 10
  end
end

Nice!

Thank you, Tammo for making the announced? method more concise and ruby-esk :)