Jonathan Fritz | Software, Woodworking, Robotics and More
Another semi-useless spot on the web…
When I was designing ReceiptWallet, I was concerned about the database being corrupted and losing all my data. I decided that as a backup to the database, I’d store all the files as PDFs (later in life it would store other types of files, but for the most part people only stored PDFs) and would embed all the metadata as PDF keywords that could be recovered. The keywords in the PDFs also served as a transport mechanism where you could send a PDF from ReceiptWallet to someone else with ReceiptWallet and when
While this original idea seemed pretty solid, writing the keywords for the PDFs proved to be somewhat problematic. At the time, Apple’s PDFKit wasn’t completely reliable and could corrupt files when writing them out or crash. Reluctantly I added a switch to ReceiptWallet to turn off this feature (default was to have this on). So depending on the PDF, some PDFs may not have keyword data in them so metadata would basically be lost.
Jonathan Fritz | Software, Woodworking, Robotics and More