FIX: badge backfilling triggers :user_badge_granted DiscourseEvent (#17514)

app/models/badge.rb

@@ -318,6 +318,10 @@ class Badge < ActiveRecord::Base
     id == Welcome || (badge_grouping_id == BadgeGrouping::GettingStarted && id != NewUserOfTheMonth)
   end
 
+  def trigger_badge_granted_event(user_id)
+    DiscourseEvent.trigger(:user_badge_granted, self.id, user_id)
+  end
+
   protected
 
   def ensure_not_system

app/models/user_badge.rb

@@ -41,7 +41,7 @@ class UserBadge < ActiveRecord::Base
     Badge.increment_counter 'grant_count', self.badge_id
     UserStat.update_distinct_badge_count self.user_id
     UserBadge.update_featured_ranks! self.user_id
-    DiscourseEvent.trigger(:user_badge_granted, self.badge_id, self.user_id)
+    self.badge.trigger_badge_granted_event(self.user_id)
   end
 
   after_destroy do

app/services/badge_granter.rb

@@ -445,6 +445,7 @@ class BadgeGranter
       next if row.staff && badge.awarded_for_trust_level?
 
       notification = send_notification(row.user_id, row.username, row.locale, badge)
+      badge.trigger_badge_granted_event(row.user_id)
 
       DB.exec(
         "UPDATE user_badges SET notification_id = :notification_id WHERE id = :id",

spec/models/badge_spec.rb

@@ -234,4 +234,17 @@ describe Badge do
       expect(regular_badge.allow_title).to eq(false)
     end
   end
+
+  context "#trigger_badge_granted_event" do
+    it "triggers a 'user_badge_granted' event" do
+      badge = Fabricate(:badge)
+      user = Fabricate(:user)
+      event = DiscourseEvent.track(:user_badge_granted) do
+        badge.trigger_badge_granted_event(user.id)
+      end
+
+      expect(event[:event_name]).to eq(:user_badge_granted)
+      expect(event[:params]).to eq([badge.id, user.id])
+    end
+  end
 end

spec/services/badge_granter_spec.rb

@@ -481,6 +481,16 @@ describe BadgeGranter do
       BadgeGranter.backfill(Badge.find(Badge::GreatPost))
       expect(UserBadge.find_by(user_id: user.id, badge_id: Badge::GreatPost)).to eq(nil)
     end
+
+    it 'calls user_badge_granted on backfilled badge' do
+      post = create_post(user: user)
+      action = PostActionCreator.like(liker, post).post_action
+
+      Badge.any_instance.expects(:trigger_badge_granted_event).with(user.id).once
+      Badge.any_instance.expects(:trigger_badge_granted_event).with(liker.id).once
+
+      BadgeGranter.process_queue!
+    end
   end
 
   context 'notification locales' do