Design Pattern: Command and Hotel Service

service_panel.rb

class ServicePanel
  attr_reader :button_a1, :button_a2, :button_b1, :button_b2
  
  def initialize(a1_service, a2_service, 
    b1_service, b2_service)
    @button_a1 = Button.new(a1_service)
    @button_a2 = Button.new(a2_service)
    @button_b1 = Button.new(b1_service)
    @button_b2 = Button.new(b2_service)
  end
end

class Button
  attr_reader :service
  
  def initialize(service)
    @service = service
  end
  
  def on_button_click
    service.execute
  end
end