action callbacks

Is there a built in way of firing off a function when a action in completed in ckfinder.

i.e. if someone uploads a file successfully, fire a function to insert some data and that filename into a mysql database.

I see something like this in the source, however i can only seem to find JS based references to such actions, and even those i cant find enough docs on the js side of things to get things rolling. Whats the best way to accomplish this, or should i just hardcode my own stuff into the source ?