auth_helper.rb

module AuthHelper
  def if_admin
    if user = current_user && user.active? && user.roles.include?(:admin)
      yield
    end
  end
end

auth_sample.erb

<% if user = current_user && user.active? && user.roles.include?(:admin) %>
  This is the secret message for admins
<% end %>

Some content

<% if user = current_user && user.active? && user.roles.include?(:admin) %>
  More information for admins only
<% end %>

auth_sample_with_helper.erb

<% if_admin do %>
  This is the secret message for admins
<% end %>

Some content

<% if_admin do %>
  More information for admins only
<% end %>

result_builder1.rb

module ResultHelper
  def result_for(action_name, &block)
    builder = Builder.new(self, action_name)

    concat(builder.html(&block))
  end

  class Builder
    def initialize(template, action_name)
      @template     = template
      @action_name  = action_name
    end

    def html(&block)
      "This is HTML code"
    end
  end
end

result_builder2.rb

module ResultHelper
  def result_for(action_name, &block)
    concat(
      Builder.new(self, action_name).html(&block)
    )
  end

  class Builder
    attr_reader :template

    delegate :capture, :to => :template

    def initialize(template, action_name)
      @template     = template
      @action_name  = action_name
    end

    def html(&block)
      "This is HTML code"
    end

    def message(css_class = nil, &block)
      @message = capture(&block)
      @message_class = css_class
    end

    def buttons(css_class = nil, &block)
      @buttons = capture(&block)
      @buttons_class = css_class
    end

    def additional(css_class = nil, link_text = "Additional Info...", &block)
      @additional = capture(&block)
      @additional_class = css_class
      @additional_link_Text = link_text
    end
  end
end

result_builder_final.rb

module ResultHelper
  def result_for(action_name, &block)
    concat(
      Builder.new(self, action_name).html(&block)
    )
  end

  class Builder
    attr_reader :template

    delegate :capture, :content_tag, :link_to, :javascript_tag, :request, :to => :template

    def initialize(template, action_name)
      @template     = template
      @action_name  = action_name
    end

    def html(&block)
      result = [
        content_tag(:div, @message, :class => "message #{@message_class}"),
        content_tag(:div, @buttons, :class => "buttons #{@buttons_class}")
      ]

      if @additional
        result << content_tag(:div, @additional,
          :class => "additional #{@additional_class}",
          :style => "display: none"
        )

        result << link_to(@additional_link_text,
          "$('#{block_id}').find('.additional, a.show').toggle()",
          :class => :show
        )
      end

      result << javascript_tag(
        "$(document).trigger('result.#{ request.xhr? ? :ajax : :inline }');"
      )

      content_tag(:div, result.join(" ").html_safe,
        :class  => "result",
        :id     => block_id
      )
    end

    def block_id
      "result_for_#{@action_name}"
    end

    def message(css_class = nil, &block)
      @message = capture(&block)
      @message_class = css_class
    end

    def success(&block)
      message(:success, &block)
    end

    def failure(&block)
      message(:failure, &block)
    end
    
    def notice(&block)
      message(:notice, &block)
    end

    def buttons(css_class = nil, &block)
      @buttons = capture(&block)
      @buttons_class = css_class
    end

    def additional(css_class = nil, link_text = "Additional Info...", &block)
      @additional = capture(&block)
      @additional_class = css_class
      @additional_link_text = link_text
    end
  end
end

result_helper.rb

module ResultHelper
  def result_for(name, options = {})
    message = content_tag(:div, options[:message], :class => :message)
    buttons = content_tag(:div, options[:buttons].join(' '), :class => :buttons)

    if options[:additional]
      additional = content_tag(:div, options[:additional], 
        :class => :additional,
        :style => "display:none"
      )

      additional << link_to_function('Additonal Info...',
          '$("#result_for_action").find(".additional, a.show").toggle()',
          :class => :show
        )
    else
      additional = ''
    end

    javascript = javascript_tag(
      "$(document).trigger('result.#{ request.xhr? ? :ajax : :inline }');"
    )

    content_tag(:div,
      [message, buttons, additional, javascript].join(" ").html_safe,
      :class => :result,
      :id => "result_for_#{name}"
    )
  end
end

result_sample.erb

<div id="result_for_action" class="result">
  <div class="message">
    <%= message_text.html_safe %>
  </div>

  <div class="buttons">
    <%= link_to("Some Action", some_action_path) %>

    <%= link_to("Other Action", other_action_path) %>
  </div>

  <% if additional_info %>
    <div class="additional" style="display:none;">
      <%= additional_info.html_safe %>
    </div>

    <%= link_to_function('Additonal Info...', 
          '$("#result_for_action").find(".additional, a.show").toggle()',
          :class => :show
        ) %>
  <% end %>
</div>

<% javascript_tag do %>
  <% if request.xhr? %>
    $(document).trigger('result.ajax');
  <% else %>
    $(document).trigger('result.inline');
  <% end %>
<% end %>

result_sample_with_helper.rb

<%= result_for(:action,
      :message => message_text,
      :buttons => [
        link_to("Some Action", some_action_path),
        link_to("Other Action", other_action_path)
      ],
      :additional => additional_info
    ) %>

result_sample_with_helper_omg.rb

<%= result_for(:action,
      :message        => message_text,
      :message_class  => :success,
      :buttons        => if current_user
        [
          link_to("Some Action", some_action_path),
          link_to("Other Action", other_action_path)
        ]
      else
        [
          link_to("Login", login_path)
        ]
      end,
      :buttons_class  => (:unauthorize unless current_user),
      :additional     => additional_info + (some_text || ""),
      :additional_link_text => "Additional Info and Instructions..."
    ) %>