DEV: Add option to send system message to groups (#12256)

app/jobs/scheduled/schedule_backup.rb

@@ -26,12 +26,12 @@ module Jobs
     end
 
     def notify_user(ex)
-      post = SystemMessage.create_from_system_user(
+      SystemMessage.create_from_system_user(
         Discourse.system_user,
         :backup_failed,
+        target_group_names: Group[:admins].name,
         logs: "#{ex}\n" + ex.backtrace.join("\n")
       )
-      post.topic.invite_group(Discourse.system_user, Group[:admins])
     end
   end
 end

lib/system_message.rb

@@ -18,15 +18,16 @@ class SystemMessage
   end
 
   def create(type, params = {})
+    from_system = params.delete(:from_system)
+    target_group_names = params.delete(:target_group_names)
+
     params = defaults.merge(params)
-    from_system = params[:from_system] || false
 
     title = params[:message_title] || I18n.with_locale(@recipient.effective_locale) { I18n.t("system_messages.#{type}.subject_template", params) }
     raw = params[:message_raw] || I18n.with_locale(@recipient.effective_locale) { I18n.t("system_messages.#{type}.text_body_template", params) }
 
     if from_system
       user = Discourse.system_user
-      target_group_names = nil
     else
       user = Discourse.site_contact_user
       target_group_names = Group.exists?(name: SiteSetting.site_contact_group_name) ? SiteSetting.site_contact_group_name : nil