Testing decorator implementation with Lucky

decorator_base.cr

abstract class DecoratorBase

  private macro decorate(ident, name = nil)
    @_{{ ident.id.stringify.downcase.id }} : {{ ident.id }}

    forward_missing_to @_{{ ident.id.stringify.downcase.id }}

    def initialize(@_{{ ident.id.stringify.downcase.id }} : {{ ident.id }})
    end
  end

end

user_decorator.cr

class UserDecorator < DecoratorBase

  decorate User

  def profile_photo
    if photo = profile_picture_url
      photo
    else
      "https://lejeunefoundation.org/wp-content/uploads/2017/06/male.jpg"
    end
  end

end