Send the user a notice when they've received rookie of the month

app/jobs/scheduled/grant_rookie_badges.rb

@@ -11,7 +11,13 @@ module Jobs
       scores.each do |user_id, score|
         # Don't bother awarding to users who haven't received any likes
         if score > 0.0
-          BadgeGranter.grant(badge, User.find(user_id))
+          user = User.find(user_id)
+          if user.badges.where(id: Badge::RookieOfTheMonth).blank?
+            BadgeGranter.grant(badge, user)
+            SystemMessage.new(user).create('rookie_of_the_month', {
+              month_year: Time.now.strftime("%B %Y")
+            })
+          end
         end
       end
     end

config/locales/server.en.yml

@@ -2319,6 +2319,16 @@ en:
 
         [Please review and fix them](%{base_url}/admin).
 
+    rookie_of_the_month:
+      title: "You're a Rookie of the Month!"
+      subject_template: "You're a Rookie of the Month!"
+      text_body_template: |
+        Congratulations, you've been awarded the **Rookie of the Month award for %{month_year}**.
+
+        You received this because you've quickly become a valuable member of the community and other members are really enjoying your posts.
+
+        Thanks and keep up the great work!
+
   unsubscribe_link: |
     To unsubscribe from these emails, [click here](%{unsubscribe_url}).