How I use POROs to build maintainable views

view_object.rb

module FieldsetWithSubtext
  def fieldset_with_subtext(main_text, subtext, options = {}, &block)
    View.new(self, main_text, subtext, options, &block)
  end

  class View
    attr_reader :context, :main_text, :subtext, :options, :block
  
    def initialize(context, main_text, subtext, options = {}, &block)
      @context = context
      @main_text = main_text
      @subtext = subtext
      @options = options
      @block = block
    end
  
    def template
      %<%s <small>%s</small>> % contents
    end
  
    def contents
      [main_text, subtext]
    end
  
    def to_s
      context.field_set_tag(template.html_safe, options, &block)
    end
  end
end