One method for multiple controllers?

[eluser]erik.brannstrom[/eluser]
Hi!

I'm building a site which features some basic community functions, pretty much meaning a simple messaging system. The messaging functionality is up and running, problem is I now want the link to the inbox to reflect wheter or not there are unread messages waiting.

This link is in the header view, which is loaded in every controller. I want it to check for new messages on every page load but I can't figure out how to do that without breaking the MVC model and without having to repeat the same line of code in every controller.

Is a hook at post_controller_constructor a possible solution? I just have a feeling that this is not what is meant by "extending the framwork core".. All suggestions are very much welcome!

Best regards,
Erik Brännström