Ruby

Comprehensive Challenges

class Vehicle
  class << self
    attr_accessor :engine, :wheels, :color, :interior

    def configure
    end

    def summarize_configuration
    end

    def interior
    end
  end
  
  private

    class Interior
      attr_accessor :material, :color

      def summarize_configuration
      end
    end
end

Vehicle.configure do |config|
  config.engine = "V6"
  config.wheels = 4
  config.color = "red"
  config.interior do |int|
    int.material = "leather"
    int.color = "black"
  end
end

Vehicle.summarize_configuration


class Vehicle
  class << self
    attr_accessor :engine, :wheels, :color, :interior_config

    def configure
      yield(self)
    end

    def summarize_configuration
      config_summary = "The vehicle has a #{engine} engine, #{wheels} wheels, a #{color} exterior color"

      config_summary += interior_config.summarize_configuration if interior_config

      puts config_summary + "."
    end

    def interior
      @interior_config ||= Interior.new
      yield(interior_config)
    end
  end
  
  private 
  
    class Interior
      attr_accessor :material, :color

      def summarize_configuration
        " and a #{material} #{color} interior"
      end
    end
end

Vehicle.configure do |config|
  config.engine = "V6"
  config.wheels = 4
  config.color = "red"
  config.interior do |int|
    int.material = "leather"
    int.color = "black"
  end
end

Vehicle.summarize_configuration
