What would be the best way to track who is online? Should I just add a
filter to all my controllers to track the last time each user commits an
action? Then I can deduce that whoever is active in the last 5 mins is
Additionally, I can be more sophisticated and track the actual actions
each user commits. So I can have features like Digg Spy.
Or is there an already pre-built modules/tutorials that I can follow.