Zip file extraction for Preservica

One of the issues we've been having with Preservica is that ZIP files and other container files function as a 'black box' for the system, the files inside are not visible to the system and we have no information on important digital preservation data such as filetypes and metadata on the individual files. We have created these scripts and workflow to try to remedy this. The scripts collectively downloads, assesses and re-uploads the contained files into a sub folder in the same folder as the original ZIP file. Since Preservica uses ZIP files as a SIP format this reupload process triggers a new ingest process for the files themselves. We also add a PREMIS event to the original ZIP file to provide a paper trail.