Merge pull request #3728 from tgxworld/add_trigger_post_process

FEATURE: Add a trigger for plugins to include their own post processing jobs.

app/models/post.rb

@@ -498,6 +498,7 @@ class Post < ActiveRecord::Base
     args[:image_sizes] = image_sizes if image_sizes.present?
     args[:invalidate_oneboxes] = true if invalidate_oneboxes.present?
     Jobs.enqueue(:process_post, args)
+    DiscourseEvent.trigger(:after_trigger_post_process, self)
   end
 
   def self.public_posts_count_per_day(start_date, end_date, category_id=nil)

spec/components/post_creator_spec.rb

@@ -75,6 +75,7 @@ describe PostCreator do
         DiscourseEvent.expects(:trigger).with(:post_created, anything, anything, user).once
         DiscourseEvent.expects(:trigger).with(:after_validate_topic, anything, anything).once
         DiscourseEvent.expects(:trigger).with(:before_create_topic, anything, anything).once
+        DiscourseEvent.expects(:trigger).with(:after_trigger_post_process, anything).once
         creator.create
       end