An addon idea, is it feasible?

[deathgrasp]

I am thinking of crafting an addon that focuses on autocasts, such as for example, "cast when spell duration is over" instead of "whenever available".
Question is, is it possible? If so, do you know where can I read on how to do that?

[stinkstink]

Have your talents set a custom effect on the user, and put what you want the spell to do in the effect's deactivate function?

[deathgrasp]

It's possible to do it that way, I guess, but I can encounter many issues with certain spells.
While it will work great if I want a specific spell, I would like it to function in a similar manner to the currently implemented auto-casts (the whenever possible, when enemy is visible, when enemy is visible and adjacent, and no enemy visible) as it will be easier for the users to use it.