Use AR callbacks instead of observers (removed in Rails4) for notifications.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@12021 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/wiki_content.rb

@@ -26,6 +26,8 @@ class WikiContent < ActiveRecord::Base
 
   acts_as_versioned
 
+  after_save :send_notification
+
   def visible?(user=User.current)
     page.visible?(user)
   end
@@ -145,4 +147,19 @@ class WikiContent < ActiveRecord::Base
       end
     end
   end
+
+  private
+
+  def send_notification
+    # new_record? returns false in after_save callbacks
+    if id_changed?
+      if Setting.notified_events.include?('wiki_content_added')
+        Mailer.wiki_content_added(self).deliver
+      end
+    elsif text_changed?
+      if Setting.notified_events.include?('wiki_content_updated')
+        Mailer.wiki_content_updated(self).deliver
+      end
+    end
+  end
 end