drapergem/draper

module Rails
  module Generators
    class DecoratorGenerator < NamedBase
      source_root File.expand_path("templates", __dir__)
      check_class_collision suffix: "Decorator"

      class_option :parent, type: :string, desc: "The parent class for the generated decorator"

      def create_decorator_file
        template 'decorator.rb', File.join('app/decorators', class_path, "#{file_name}_decorator.rb")
      end

      hook_for :test_framework

      private

      def parent_class_name
        options.fetch("parent") do
          begin
            require 'application_decorator'
            ApplicationDecorator
          rescue LoadError
            "Draper::Decorator"
          end
        end
      end
    end
  end
end