Forums enhancements:

* messages can now be edited/deleted (explicit permissions need to be given)
* topics can be locked so that no reply can be added (only by users allowed to edit messages)
* topics can be marked as sticky so that they always appear at the top of the list (only by users allowed to edit messages)

git-svn-id: http://redmine.rubyforge.org/svn/trunk@926 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/message.rb

@@ -30,9 +30,15 @@ class Message < ActiveRecord::Base
                 :description => :content,
                 :url => Proc.new {|o| {:controller => 'messages', :action => 'show', :board_id => o.board_id, :id => o.id}}
   
+  attr_protected :locked, :sticky
   validates_presence_of :subject, :content
   validates_length_of :subject, :maximum => 255
   
+  def validate_on_create
+    # Can not reply to a locked topic
+    errors.add_to_base 'Topic is locked' if root.locked?
+  end
+  
   def after_create
     board.update_attribute(:last_message_id, self.id)
     board.increment! :messages_count
@@ -43,6 +49,18 @@ class Message < ActiveRecord::Base
     end
   end
   
+  def after_destroy
+    # The following line is required so that the previous counter
+    # updates (due to children removal) are not overwritten
+    board.reload
+    board.decrement! :messages_count
+    board.decrement! :topics_count unless parent
+  end
+  
+  def sticky?
+    sticky == 1
+  end
+  
   def project
     board.project
   end