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
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.
-Andrew