Makes the wiki sidebar editable (#5208).

The content of the wiki page named 'Sidebar' is rendered in the sidebar if it exists. Permission to edit protected pages is required to create this page.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@3632 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/wiki_page.rb

@@ -41,6 +41,15 @@ class WikiPage < ActiveRecord::Base
   validates_uniqueness_of :title, :scope => :wiki_id, :case_sensitive => false
   validates_associated :content
   
+  # Wiki pages that are protected by default
+  DEFAULT_PROTECTED_PAGES = %w(sidebar)
+  
+  def after_initialize
+    if new_record? && DEFAULT_PROTECTED_PAGES.include?(title.to_s.downcase)
+      self.protected = true
+    end
+  end
+  
   def visible?(user=User.current)
     !user.nil? && user.allowed_to?(:view_wiki_pages, project)
   end