add logic that auto closes any topics that missed the queued job (due to redis flush or whatever)

app/jobs/regular/close_topic.rb

@@ -2,12 +2,9 @@ module Jobs
   class CloseTopic < Jobs::Base
 
     def execute(args)
-      topic = Topic.where(id: args[:topic_id]).first
-      if topic and topic.auto_close_at and !topic.closed? and !topic.deleted_at
+      if topic = Topic.where(id: args[:topic_id]).first
         closer = User.where(id: args[:user_id]).first
-        if Guardian.new(closer).can_moderate?(topic)
-          topic.update_status('autoclosed', true, closer)
-        end
+        topic.auto_close(closer)
       end
     end
 

app/jobs/scheduled/periodical_updates.rb

@@ -25,6 +25,8 @@ module Jobs
       # Refresh Hot Topics
       HotTopic.refresh!
 
+      # Automatically close stuff that we missed
+      Topic.auto_close
     end
 
   end

app/models/topic.rb

@@ -599,6 +599,21 @@ class Topic < ActiveRecord::Base
     set_auto_close(num_days)
   end
 
+  def self.auto_close
+    Topic.where("NOT closed AND auto_close_at < ? AND auto_close_user_id IS NOT NULL", 5.minutes.from_now).each do |t|
+      t.auto_close
+    end
+  end
+
+  def auto_close(closer = nil)
+    if auto_close_at && !closed? && !deleted_at && auto_close_at < 5.minutes.from_now
+      closer ||= auto_close_user
+      if Guardian.new(closer).can_moderate?(self)
+        update_status('autoclosed', true, closer)
+      end
+    end
+  end
+
   def set_auto_close(num_days, by_user=nil)
     num_days = num_days.to_i
     self.auto_close_at = (num_days > 0 ? num_days.days.from_now : nil)

spec/models/topic_spec.rb

@@ -1051,7 +1051,17 @@ describe Topic do
           topic = Fabricate(:topic, category: Fabricate(:category, auto_close_days: 14), user: mod)
           Jobs.expects(:enqueue_at).with(12.hours.from_now, :close_topic, has_entries(topic_id: topic.id, user_id: topic.user_id))
           topic.auto_close_at = 12.hours.from_now
-          topic.save.should be_true
+          topic.save
+
+          topic.reload
+          topic.closed.should == false
+
+          Timecop.freeze(24.hours.from_now) do
+            Topic.auto_close
+            topic.reload
+            topic.closed.should == true
+          end
+
         end
       end
     end