coffee_1.rb

class CoffeeMaker
  def self.make_coffee(params)
    ingredients = {
      espresso: params.fetch(:espresso, false),
      milk_foam: params.fetch(:milk_foam, false),
      whipped_cream: params.fetch(:whipped_cream, false),
      steamed_milk: params.fetch(:steamed_milk, false),
      chokolate_syrup: params.fetch(:chokolate_syrup, false),
      hot_water: params.fetch(:hot_water, false)
    }

    #
    # and some lines of code
    #

    return cup_of_coffee(ingredients)
  end
end

espresso = CoffeeMaker.make_coffee(espresso: true)
espresso_macchiato = CoffeeMaker.make_coffee(espresso: true, milk_foam: true)
espresso_con_panna = CoffeeMaker.make_coffee(espresso: true, whipped_cream: true)
caffe_latte = CoffeeMaker.make_coffee(espresso: true, milk_foam: true, steamed_milk: true)
flat_white = CoffeeMaker.make_coffee(espresso: true, steamed_milk: true)
caffee_mocha = CoffeeMaker.make_coffee(espresso: true, whipped_cream: true, steamed_milk: true, chokolate_syrup: true)
americano = CoffeeMaker.make_coffee(espresso: true, hot_water: true)