Create Child Works based on PDF fileset's file

The incoming path has been using a temp file location which no longer
exists when the ChildWorksFromPdfJob runs.

This change uses the fileset's actual file to trigger the child works
creation behavior.

app/actors/iiif_print/actors/file_set_actor_decorator.rb

@@ -1,6 +1,9 @@
 # frozen_string_literal: true
 
 # override to add PDF splitting for file sets and remove splitting upon fileset delete
+
+# Depending on whether we have an uploaded file or a remote url, the sequence of calling 
+# attach_to_work and create_content will switch.  
 module IiifPrint
   module Actors
     module FileSetActorDecorator
@@ -9,7 +12,9 @@ def create_content(file, relation = :original_file, from_url: false)
         super
 
         if from_url
-          args = { file_set: file_set, file: file, import_url: file_set.import_url, user: @user }
+          # in this case, the file that came in is a temp file, and we need to use the actual file.
+          # the file was attached to the file_set in Hyrax::ImportUrlJob so we can just access it.
+          args = { file_set: file_set, file: file_set.files.first, import_url: file_set.import_url, user: @user }
           returned_value = service.conditionally_enqueue(**args)
           Rails.logger.info("Result of #{returned_value} for conditional enqueueing of #{args.inspect}")
           true
@@ -24,6 +29,10 @@ def attach_to_work(work, file_set_params = {})
         # Locks to ensure that only one process is operating on the list at a time.
         super
 
+        # when we are importing a remote_url, this method is called before the file is attached.
+        # We want to short-circuit the process and prevent unnecessarily confusing logging.
+        return unless @file
+
         args = { file_set: file_set, work: work, file: @file, user: @user }
         returned_value = service.conditionally_enqueue(**args)
         Rails.logger.info("Result of #{returned_value} for conditional enqueueing of #{args.inspect}")

lib/iiif_print/split_pdfs/child_work_creation_from_pdf_service.rb

@@ -28,7 +28,7 @@ def self.conditionally_enqueue(file_set:, file:, user:, import_url: nil, work: n
         return :no_split_for_parent unless iiif_print_split?(work: work)
         return :no_pdfs_for_import_url if import_url && !pdfs?(paths: [import_url])
         file_locations = if import_url
-                           [file.path]
+                           [Hyrax::WorkingDirectory.find_or_retrieve(file.id, file_set.id)]
                          else
                            pdf_paths(files: [file.try(:id)&.to_s].compact)
                          end