do not mutate file_set instance variable

app/actors/hyrax/actors/create_with_remote_files_actor.rb

@@ -62,7 +62,8 @@ def attach_files(env, remote_files)
       end
 
       def create_file_from_url(env, uri, file_name, auth_header)
-        if env.curation_concern.is_a? Valkyrie::Resource
+        case env.curation_concern.is_a
+        when Valkyrie::Resource
           create_file_from_url_through_valkyrie(env, uri, file_name, auth_header)
         else
           create_file_from_url_through_active_fedora(env, uri, file_name, auth_header)

app/actors/hyrax/actors/file_set_actor.rb

@@ -68,7 +68,6 @@ def create_metadata(file_set_params = {})
         yield(file_set) if block_given?
       end
 
-      # Adds a FileSet to the work using ore:Aggregations.
       # Locks to ensure that only one process is operating on the list at a time.
       def attach_to_work(work, file_set_params = {})
         acquire_lock_for(work.id) do
@@ -87,15 +86,18 @@ def attach_to_work(work, file_set_params = {})
       def attach_to_valkyrie_work(work, file_set_params)
         work = Hyrax.query_service.find_by(id: work.id) unless work.new_record
         file_set.visibility = work.visibility unless assign_visibility?(file_set_params)
-        @file_set = Hyrax.persister.save(resource: file_set)
-        work.member_ids << file_set.id
-        work.representative_id = file_set.id if work.representative_id.blank?
-        work.thumbnail_id = file_set.id if work.thumbnail_id.blank?
+        fs = Hyrax.persister.save(resource: file_set)
+        Hyrax.publisher.publish('object.metadata.updated', object: fs, user: user)
+        work.member_ids << fs.id
+        work.representative_id = fs.id if work.representative_id.blank?
+        work.thumbnail_id = fs.id if work.thumbnail_id.blank?
         # Save the work so the association between the work and the file_set is persisted (head_id)
         # NOTE: the work may not be valid, in which case this save doesn't do anything.
         Hyrax.persister.save(resource: work)
+        Hyrax.publisher.publish('object.metadata.updated', object: work, user: user)
       end
 
+      # Adds a FileSet to the work using ore:Aggregations.
       def attach_to_af_work(work, file_set_params)
         work.reload unless work.new_record?
         file_set.visibility = work.visibility unless assign_visibility?(file_set_params)