how to get all values of "id" in node js?

So I have couples Json files that i'm trying to acces to get some data, here is what my json file look like:

I have many files that looks like this with the statuts of each id that changes from available to not from a file to another ( you can notice the time stamp of the change in th ename of the file), What I'm trying to do is to parse through my json files (working on two first ) and after comparing the two json file see wich id button changed it status and get the time stamp from the "name of the file".

I really have no idea how to do that. So my logic is to parse through two files, then what ? how do I make it remember which is id changed??

Thank you for your help

via Marou Aityahia