Control of brightness and color temperature in 10 steps (https://www.instagram.com/p/Bt8dhKcAxaJ/)

light_brightness_and_color.rb

def initialize_state
  $color_state_file = "#{__dir__}/color_state_file"
  $brightness_state_file = "#{__dir__}/brightness_state_file"
  update_color_state(10) unless FileTest.exist?($color_state_file)
  update_brightness_state(10) unless FileTest.exist?($brightness_state_file)
  $color_state = File.read($color_state_file).to_i
  $brightness_state = File.read($brightness_state_file).to_i
end


def update_color_state(state)
  File.open($color_state_file,"w") {|f|f.print state }
end

def update_brightness_state(state)
  File.open($brightness_state_file,"w") {|f|f.print state }
end

def check_color_temp
  ct = ARGV[0].to_i
  unless ct >= 50 && ct <= 400
    puts ("ERROR!: color temperature range.")
    return
  end
  $target_color_temp = (ct - 50)/35
end

def check_brightness
  bn =  ARGV[1].to_i
  unless bn >= 0 && bn <= 100
    puts ("ERROR!: brightness range.")
    return
  end
  $target_brightness = bn/10
end

def change_brightness
  p diff = $target_brightness - $brightness_state

  brightness_up(diff) if diff.positive?
  brightness_down(diff) if diff.negative?
  update_brightness_state($target_brightness)
end

def change_color_temp
  p diff = $target_color_temp - $color_state

  orange_up(diff) if diff.positive?
  white_up(diff) if diff.negative?
  update_color_state($target_color_temp)
end

def brightness_up(n)
  `irsend -##{n} send_once 'light1' 'light_up'`
  sleep 2
end

def brightness_down(n)
  `irsend -##{n.abs} send_once 'light1' 'light_down'`
  sleep 2
end

def orange_up(n)
  `irsend -##{n} send_once 'light1' 'orange_up'`
  sleep 2
end

def white_up(n)
  `irsend -##{n.abs} send_once 'light1' 'white_up'`
  sleep 2
end

check_color_temp
check_brightness

initialize_state
change_brightness unless $target_brightness.nil?
change_color_temp unless $target_color_temp.nil?