Added the ability to rename wiki pages (specific permission required).

Existing links that point to the old page are preserved and automatically redirected to the new page (this behaviour can be disabled when renaming the page).

git-svn-id: http://redmine.rubyforge.org/svn/trunk@720 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/wiki.rb

@@ -18,6 +18,7 @@
 class Wiki < ActiveRecord::Base
   belongs_to :project
   has_many :pages, :class_name => 'WikiPage', :dependent => :destroy
+  has_many :redirects, :class_name => 'WikiRedirect', :dependent => :delete_all
   
   validates_presence_of :start_page
   validates_format_of :start_page, :with => /^[^,\.\/\?\;\|\:]*$/
@@ -25,14 +26,20 @@ class Wiki < ActiveRecord::Base
   # find the page with the given title
   # if page doesn't exist, return a new page
   def find_or_new_page(title)
-    title = Wiki.titleize(title || start_page)
-    find_page(title) || WikiPage.new(:wiki => self, :title => title)  
+    find_page(title) || WikiPage.new(:wiki => self, :title => Wiki.titleize(title))
   end
   
   # find the page with the given title
-  def find_page(title)
+  def find_page(title, options = {})
     title = start_page if title.blank?
-    pages.find_by_title(Wiki.titleize(title))
+    title = Wiki.titleize(title)
+    page = pages.find_by_title(title)
+    if !page && !(options[:with_redirect] == false)
+      # search for a redirect
+      redirect = redirects.find_by_title(title)
+      page = find_page(redirect.redirects_to, :with_redirect => false) if redirect
+    end
+    page
   end
   
   # turn a string into a valid page title