Access to plugin metadata from publish deletion callback

Question

I'm using publishServiceProvider.deletePhotosFromPublishedCollection() to hook into publish deletions and ran into a bit of a snag.  I'm also using photo:setPropertyForPlugin() to set plugin and LrPhoto specific metadata that I'd like to nil out on deletion, but I can't seem to grok getting the LrPhoto ref while in the deletion callback.
Basically, given a set of plugin properties and a simple array of photoIds, I can't figure out how to clean up my metadata for a specific LrPhoto item.
Any suggestions?

Answer 1

Interesting -- publishServiceProvider.deletePhotosFromPublishedCollection()  doesn't provide the LrPublishedCollection from which the photos are being deleted.  Seems like a design oversight.
Here's brute-force solution for creating a table on the fly that maps remote ids to LrPhotos for your publish service:
- Get the plugin's LrPublishService via
catalog:getPublishServices().
- Enumerate all LrPublishedCollections and LrPublishedCollectionSets in the service via publishService:getChildCollections() and :getChildCollectionSets().
- Enumerate all the LrPublishedPhotos in the published collections via publishedCollection:getPublishedPhotos().
- For each LrPublishedPhoto, call publishedPhoto:getPhoto() and :getRemoteId() to get the LrPhoto and remote id, which you can add to the table.