Notify remote users about mentions

app/services/post_status_service.rb

@@ -9,6 +9,11 @@ class PostStatusService < BaseService
       next unless local_account.nil?
       follow_remote_account_service.("acct:#{match.first}")
     end
+
+    status.mentions.each do |mentioned_account|
+      next if mentioned_account.local?
+      send_interaction_service.(status.stream_entry, mentioned_account)
+    end
   end
 
   private
@@ -16,4 +21,8 @@ class PostStatusService < BaseService
   def follow_remote_account_service
     @follow_remote_account_service ||= FollowRemoteAccountService.new
   end
+
+  def send_interaction_service
+    @send_interaction_service ||= SendInteractionService.new
+  end
 end