History Pages

From Jason Blevins:
  Create a "History" page for each wiki page.
  Link to it, and to the "Diff" page from "Recently Revised".
Also, correct a bug in listing/deleting links to uploaded
video and audio files.

app/helpers/application_helper.rb

@@ -52,6 +52,22 @@ module ApplicationHelper
     UrlGenerator.new(@controller).make_link(page.author.name, page.web, nil, options)
   end
 
+  # Create a hyperlink to a particular revision of a Wiki page
+  def link_to_revision(page, revision_number, text = nil, mode = nil, html_options = {})
+    link_to(
+        text || page.plain_name + "(rev # #{revision_number})",
+            {:web => @web.address, :action => 'revision', :id => page.name,
+              :rev => revision_number, :mode => mode}, html_options)
+  end
+
+  # Create a hyperlink to the history of a particular Wiki page
+  def link_to_history(page, text = nil, html_options = {})
+    link_to(
+        text || page.plain_name + "(history)",
+            {:web => @web.address, :action => 'history', :id => page.name},
+            html_options)
+  end
+
   def base_url
     home_page_url = url_for :controller => 'admin', :action => 'create_system', :only_path => true
     home_page_url.sub(%r-/create_system/?$-, '')

app/helpers/wiki_helper.rb

@@ -6,6 +6,7 @@ module WikiHelper
     menu << back_for_revision if @revision_number > 1
     menu << current_revision
     menu << see_or_hide_changes_for_revision if @revision_number > 1
+    menu << history if @page.revisions.length > 1
     menu << rollback
     menu
   end
@@ -18,6 +19,7 @@ module WikiHelper
       menu << back_for_page
       menu << see_or_hide_changes_for_page
     end
+    menu << history if @page.revisions.length > 1
     menu
   end
 
@@ -31,6 +33,11 @@ module WikiHelper
     link_to('Edit Web', {:web => @web.address, :action => 'edit_web'}, 
         {:class => 'navlink', :accesskey => 'W', :id => 'edit_web', :rel => 'nofollow'})
   end
+
+  def history
+    link_to_history(@page, 'History',
+        {:class => 'navlink', :accesskey => 'S', :id => 'history', :rel => 'nofollow'})
+  end
             
   def forward
     if @revision_number < @page.revisions.length - 1