Emulate cpdf upright function in Acrobat Javascript (set page rotation to 0 but compensate scaling to have unchanged appearance)

Hi,

I am looking for a solution to integrate directly in a script in Acrobat the equivalent of the "upright" function in cpdf, which sets the page rotation to 0 but also rescales the page (mediabox). The result is that the appearance of the page does not change, but the page rotation can be set to 0 on every page.

(The reason I need this is I am developing a system to automatize the placement of dynamic stamps on multiple files. For now I use "if" to have different settings for each possible rotation setting, but it's not a very clean solution, I would prefer to have the files standardized beforehand to obtain only A4 portrait pages with page rotation set to 0).

Thank you in advance for your help.