That would be a good thing, yeah. Maybe let me write these macros with javascript (which they could interpret on the server side) or any popular scripting language that fits the bill.
Cool. I work there and I have been thinking about server side scripting for a while now. Would love to talk to you more about it; shoot me at my first name at Parse.com
-Andrew
In particular, I'd like to find out from you what kind of manipulation you have been needing to do. This would help us define the scope of this feature.