turning.rb

#!/usr/bin/env ruby

class Blink1
  def self.list
    native(["--list"]).select {|l| l =~ /^id/ }
  end

  def self.ids
    list.map {|info| info[/^id:(\d+)/]; $1 }
  end

  def self.all
    ids.map {|id| new(id) }
  end
  
  attr_reader :id

  def initialize(id)
    @id = id
  end

  def blink
    native ["--blink", 2, "-m", "100"]
    self
  end

  def off
    native ["--off"]
    self
  end

  def color(rgb="255,255,255")
    native ["--rgb", rgb, "-m", "800"]
    self
  end

  private

  def native(flags)
    flags += ["-d",id]
    self.class.native(flags)
    self
  end

  def self.native(flags)
    flags = flags.map(&:to_s)
    output = IO.popen(['blink1-tool', *flags])
    output.readlines
  end
end

blinks = Blink1.all

blinks.each {|b| b.blink }
puts "Which blinked first? ([R]ight/[l]eft):"
choice = STDIN.gets.chomp
if choice =~ /l/i
  left, right = blinks
else
  right, left = blinks
end

begin
    system("stty raw -echo") #=> Raw mode, no echo
  loop do
    char = STDIN.getc
    break if char =~ /q/i
    Thread.new do
      case char
      when /h/
        left.color("0,200,0")
        sleep 0.5
        left.off
        sleep 0.5
        left.color("0,200,0")
        sleep 0.3
        left.off
      when /l/
        right.color("0,200,0")
        sleep 0.5
        right.off
        sleep 0.5
        right.color("0,200,0")
        sleep 0.3
        right.off
      end
    end
  end
rescue Interrupt
ensure
  blinks.each(&:off)
  system("stty -raw echo") #=> Reset terminal mode
end