module CacheSweepingHelper
  
  def expire_cached_page(web, page_name)
    expire_action :controller => 'wiki', :web => web.address,
        :action => %w(show published s5 tex print history), :id => page_name
    expire_action :controller => 'wiki', :web => web.address,
        :action => 'show', :id => page_name, :mode => 'diff'
  end

  def expire_cached_summary_pages(web)
    categories = WikiReference.all(:conditions => "link_type = 'C'")
    %w(recently_revised list).each do |action|
      expire_action :controller => 'wiki', :web => web.address, :action => action
      categories.each do |category|
        expire_action :controller => 'wiki', :web => web.address, :action => action, :category => category.referenced_name
      end
    end

    %w(authors atom_with_content atom_with_headlines file_list).each do |action|
      expire_action :controller => 'wiki', :web => web.address, :action => action
    end
    
    %w(file_name created_at).each do |sort_order|
      expire_action :controller => 'wiki', :web => web.address, :action => 'file_list', :sort_order => sort_order
    end
  end

  def expire_cached_revisions(page)
    page.revisions.length.times  do |i|
      revno = i+1
      expire_action :controller => 'wiki', :web => page.web.address,
          :action => 'revision', :id => page.name, :rev => revno
      expire_action :controller => 'wiki', :web => page.web.address,
          :action => 'revision', :id => page.name, :rev => revno, :mode => 'diff'
    end
  end

end