DCI example where a single user has two roles

gistfile1.rb

# DCI example where a single user has two roles
class AuthorizeEmployeeDiscount
  attr_accessor :employee, :manager

  def self.execute(employee_user_id, manager_user_id)
    AuthorizeEmployeeDiscount.new(employee_user_id, manager_user_id).execute
  end

  def initialize(employee_user_id, manager_user_id)
    @employee = User.find(employee_user_id)
    @manager = User.find(manager_user_id)
    @manager.extend DiscountAuthorizor
  end

  def execute
    @manager.authorize_discount(@employee)
  end
end

employee_user_id = 999
manager_user_id = 999
AuthorizeEmployeeDiscount.execute employee_user_id, manager_user_id