added post pruner, added mod action notifications when approving/deleting posts

app/models/mod_action.rb

@@ -1,3 +1,8 @@
 class ModAction < ActiveRecord::Base
   belongs_to :creator, :class_name => "User"
+  before_validation :initialize_creator, :on => :create
+  
+  def initialize_creator
+    self.creator_id = CurrentUser.id
+  end
 end

app/models/post.rb

@@ -299,6 +299,7 @@ class Post < ActiveRecord::Base
       self.is_deleted = false
       self.approver_id = CurrentUser.id
       save!
+      ModAction.create(:description => "approved post ##{id}")
     end
   end
   
@@ -900,6 +901,7 @@ class Post < ActiveRecord::Base
         update_column(:is_deleted, true)
         update_parent_on_destroy
         tag_array.each {|x| expire_cache(x)}
+        ModAction.create(:description => "deleted post ##{id}")
       end
     end
     
@@ -907,6 +909,7 @@ class Post < ActiveRecord::Base
       update_column(:is_deleted, false)
       tag_array.each {|x| expire_cache(x)}
       update_parent_on_save
+      ModAction.create(:description => "undeleted post ##{id}")
     end
   end
   

app/models/post_flag.rb

@@ -9,8 +9,9 @@ class PostFlag < ActiveRecord::Base
   before_validation :initialize_creator, :on => :create
   validates_uniqueness_of :creator_id, :scope => :post_id, :message => "has already flagged this post"
   before_save :update_post
-  scope :resolved, where(["is_resolved = ?", true])
-  scope :unresolved, where(["is_resolved = ?", false])
+  scope :resolved, where("is_resolved = ?", true)
+  scope :unresolved, where("is_resolved = ?", false)
+  scope :old, lambda {where("created_at <= ?", 3.days.ago)}
   
   def update_post
     post.update_column(:is_flagged, true)