I would like to have an upload field in the backend that allows logged in users to upload zip files that are then unzipped to a subdirectory in the upload folder.
Is this possible with CMB2 or generally in WordPress? Does anyone know of an example, additional CMB2 plugin or snippet for this?
The reason why I need this is the following: I want to create a custom post type for multiresolution panoramas (framework Marzipano).
Such panoramas are based on an image pyramid of tiles (similar to inactive maps like Google Maps or OpenStreetMap). Hundreds of image tiles quickly accumulate, so that a manual file upload is not an option.
Here is an example, how a muliresolution panorama looks like: https://www.marzipano.net/demos/cube-multi-res/