I have a fair number of library books in EPUB and PDF formats that I am now managing with MC. This is working well for me, although I've had to make some configurations myself, and I am by nature fairly lazy. This question, however, requires not just energy but brains, so I've pretty much thrown up my hands.
Each of these files has DRM that will prohibit reading of the file after 21 days. I want to create an expression field that will read the "date modified" field of each file, and report a countdown from "21 Days" to "Expired". This is pretty much what you see in the "Adobe Digital Editions" software reader for this format, although on the last day they calculate it by the hour, and in the last hour they calculate it down to the minute.
Getting REALLY fancy (although risky) this expression could delete the file on day 22 (Expired +1).
Any ideas? I believe the EPUB format has machine-readable tags that provide this info (along with other interesting stuff), and if JRiver were ever to enhance their current state of eBook support this is where they'd start. But I think an expression field based on the "Date Modified" value of the file will serve just fine. Beyond that I am completely at sea here, so if someone has any suggestions on how to start I'd be grateful.
Thanks!