Notification System in Rails

Does anyone know any good notification plugin/gem for RoR.

I need to somehow store events and display them to the user if he/she is offline OR present them to 开发者_运维百科the user in a nice way if online.

This is similar to Facebook Notifications where a user is notified for new messages, comments, likes etc.

Thanks

There is a gem called Mailboxer which has similar functionalities.

Sounds like you may need to use Mailboxer in conjunction with PublicActivity