Module: Taggable::SiteController

Defined in:
lib/taggable/site_controller.rb

Class Method Summary collapse

Class Method Details

.included(base) ⇒ Object 



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# File 'lib/taggable/site_controller.rb', line 4

def self.included(base)
  
  base.class_eval {

    # We override find_page to handle the combination of url tags and parameter tags.
    # If this results in a change to the compound path for this page/tag combination, 
    # we raise a RedirectRequired error.
    #
    def find_page_with_tags(path)
      path = clean_path(path)
      page = find_page_without_tags(path)
      if page.respond_to?(:requested_tags)
        page.add_request_tags(Tag.in_this_list(params[:tag])) if params[:tag]      
        raise Taggable::RedirectRequired, page.path unless page.path == path
      end
      page
    end
    alias_method_chain :find_page, :tags

    # Extends show_page to catch any redirect error raised by find_page, and redirect to the specified path.
    # The effect of this is to standardise all tag-appended requests, which improves cache performance and
    # allows us to defacet by adding -tag parameters.
    #
    # (I can't remember why that was necessary: it may no longer be, so don't rely on it!).
    #
    def show_page_with_tags
      show_page_without_tags
    rescue Taggable::RedirectRequired => e
      redirect_to e.message
    end
    alias_method_chain :show_page, :tags

  protected
    def clean_path(path)
      "/#{ path.strip }/".gsub(%r{//+}, '/')
    end

  }
end