A Ruby script to drive iTunes in an alarm–clock–inspired fashion.

itunes.rb

#!/usr/bin/env ruby
%w(rubygems chronic rbosa).each {|lib| require lib}

itunes = OSA.app('iTunes')
playlist = itunes.sources[0].playlists.select{|p| p.name == 'radio'}.pop
($sleep = true and ARGV.pop if ARGV.last.match(/!/))
directives = eval("{#{ARGV.last.gsub('-', '=>')}}") rescue []
chronic = lambda{|time| time.respond_to?(:integer?) ? Time.now + time*60 : (t = Chronic.parse(time, :context => :future); t < Time.now ? t += 24*60*60 : t )}
display_time = lambda {|t| t ||= Time.now; t.strftime('%H:%M %p')}

presets = {'morning' => {:_1 => ['current', '5am']}, 'bluegrass' => {:_1 => ['jazz', '7am']}, 'routes' => {:_1 => ['current', '5am']}}
directives.merge!(presets[ARGV.first]) if ARGV.size > 1 || directives.nil? # this needs work, I can't just do itunes.rb bluegrass

jobs = directives.map do |(cmd, args)| # [":on - ['current', '8:18 am'], :off - 23"]
  case cmd.to_s
  when *%w(_1 on + start play go)
    start = chronic[args.last]
    puts "gonna start @ #{display_time[start]}"
    [start, lambda{station = playlist.search(args.first).pop; itunes.play(station); station.reveal; puts "playing — #{display_time[nil]}"}]
  when *%w(_0 _ | off stop)
    stop = chronic[args]
    puts "gonna stop @ #{display_time[stop]}"
    [stop, lambda{itunes.pause; puts "paused — #{display_time[nil]}"}]
  end
end.sort_by {|(time, lambda)| time}

sleep_then_wake_at = lambda do |time|
  OSA.app('System Events').sleep if system("sudo pmset schedule wake '#{time.strftime("%D %H:%M:%S")}'")
end

_do = lambda do |job|
  time, action = job; sleep(time - Time.now) rescue nil; action[]
  (sleep_then_wake_at[jobs.first.first]; sleep 21) if $sleep && jobs.first
  _do[jobs.shift] unless jobs.empty?
end

_do[jobs.shift]

=begin

Here's how to use this shit:

itunes.rb ":on - ['kbem', '8:18 am'], :off - 23" will
— turn itunes off in 23 minutes (you can use a more specific time here if you want)
— play the radio station with 'kbem' in it's name in the iTunes playlist radio at 8:18am
— exit successfully?

Other bits?
— You need to make a playlist in iTunes (mine's called radio) with the tracks you want to play. 
  I use internet radio stations. (see line 5).
— Calling the script with an exclamation mark will schedule your system to wake from sleep 
  before it starts playing and subsequently put it to sleep.
— Aliases for :on are :+, :start, :play, :go
— Likewise for :off,  :_, :|, :stop
— Line 11 allows you to give it preset directives: if you listen to a particular radio show, set 
  it up here and call it as follows:
    itunes.rb bluegrass ":| - 27" !
— Just as a recap, what will that last command do?
  Match the preset bluegrass, which translates into ['jazz', '7am'] (line 11); then turn off iTunes 
  (only if it's playing) 27 minutes hence. The ! means to sleep your computer. It will then wake up
  at about 7 and turn on the given station.

http://gist.github.com/16618
–Kjell Olsen

=end