Help with Extension

edited February 2007 in Vanilla 1.0 Help
I'm working on a extension that takes panel categories and adds a (10 seconds ago) or the time sense the last post in that category. I wanted to know how could I achieve this. I know you can do this with last post in the topic, but how can I make it so it works for categories. And in stead of the date when it surpases so many days can I make it just # days since rather than Jan 23rd etc?
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