Support middleware for logMessage and showMessage

Hi. I'm looking for an idiomatic way to intercept a server-initiated notification (say window/logMessage) to hook some custom functionality. The only related example I could find uses a middleware to intercept the client-initiated request, which does not seem applicable in this case. Notice that, in my case, I would need to keep forward the notification to the client so that the notification is handled as usual. Any pointer would be appreciated.