FIX: no notification was being sent when a post is hidden by community flags

app/jobs/regular/send_system_message.rb

@@ -13,7 +13,7 @@ module Jobs
       return if user.blank?
 
       system_message = SystemMessage.new(user)
-      system_message.create(args[:message_type])
+      system_message.create(args[:message_type], args[:message_options]&.symbolize_keys || {})
     end
 
   end

app/models/post_action.rb

@@ -572,7 +572,8 @@ SQL
         edit_delay: SiteSetting.cooldown_minutes_after_hiding_posts,
         flag_reason: I18n.t("flag_reasons.#{post_action_type}"),
       }
-      SystemMessage.create(post.user, :post_hidden, options)
+
+      Jobs.enqueue_in(5.seconds, :send_system_message, user_id: post.user.id, message_type: :post_hidden, message_options: options)
     end
   end
 

spec/jobs/send_system_message_spec.rb

@@ -16,10 +16,16 @@ describe Jobs::SendSystemMessage do
     let(:user) { Fabricate(:user) }
 
     it "should call SystemMessage.create" do
-      SystemMessage.any_instance.expects(:create).with('welcome_invite')
+      SystemMessage.any_instance.expects(:create).with('welcome_invite', {})
       Jobs::SendSystemMessage.new.execute(user_id: user.id, message_type: 'welcome_invite')
     end
 
+    it "can send message parameters" do
+      options = { url: "/t/no-spammers-please/123", edit_delay: 5, flag_reason: "Flagged by community" }
+      SystemMessage.any_instance.expects(:create).with('post_hidden', options)
+      Jobs::SendSystemMessage.new.execute(user_id: user.id, message_type: 'post_hidden', message_options: options)
+    end
+
   end
 
 end