DEV: Add DiscourseEvent triggers to Invitee creation and update (#683)

* DEV: Add DiscourseEvent triggers to Invitee creation and update

* undid removed code

* remove not longer used file

* change trigger name

app/models/discourse_post_event/invitee.rb

@@ -22,6 +22,7 @@ module DiscoursePostEvent
         Invitee.create!(status: Invitee.statuses[status.to_sym], post_id: post_id, user_id: user_id)
       invitee.event.publish_update!
       invitee.update_topic_tracking!
+      DiscourseEvent.trigger(:discourse_calendar_post_event_invitee_status_changed, invitee)
       invitee
     rescue ActiveRecord::RecordNotUnique
       # do nothing in case multiple new attendances would be created very fast
@@ -34,6 +35,7 @@ module DiscoursePostEvent
       self.update(status: new_status)
       self.event.publish_update!
       self.update_topic_tracking! if status_changed
+      DiscourseEvent.trigger(:discourse_calendar_post_event_invitee_status_changed, self)
       self
     end