Merge pull request #6524 from pulibrary/6509-delete-file-sets

Add service and task to delete all file sets from a resource

app/services/file_set_service.rb

@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+class FileSetService
+  def self.delete_all_from(resource_id)
+    new.delete_all_from(resource_id: resource_id)
+  end
+
+  def delete_all_from(resource_id:)
+    resource = query_service.find_by(id: resource_id)
+    change_set_persister.buffer_into_index do |buffered_change_set_persister|
+      Wayfinder.for(resource).file_sets.each do |file_set|
+        buffered_change_set_persister.delete(change_set: ChangeSet.for(file_set))
+      end
+    end
+  end
+
+ private
+
+   def change_set_persister
+     @change_set_persister ||= ChangeSetPersister.default
+   end
+
+   def query_service
+     change_set_persister.query_service
+   end
+end

lib/tasks/file_sets.rake

@@ -0,0 +1,12 @@
+# frozen_string_literal: true
+namespace :figgy do
+  namespace :file_sets do
+    desc "Delete all FileSets from a resource"
+    task delete: :environment do
+      resource_id = ENV["ID"]
+      abort "usage: ID=id rake figgy:file_sets:delete" unless resource_id
+
+      FileSetService.delete_all_from(resource_id)
+    end
+  end
+end

spec/services/file_set_service_spec.rb

@@ -0,0 +1,23 @@
+# frozen_string_literal: true
+require "rails_helper"
+
+RSpec.describe FileSetService do
+  describe ".delete_all_from" do
+    it "deletes all member file sets from a resource but no other member types" do
+      resource = FactoryBot.create_for_repository(:scanned_map_with_raster_child, state: "pending")
+      wayfinder = Wayfinder.for(resource)
+      file_sets = wayfinder.file_sets
+      raster_children = wayfinder.raster_resources
+      expect(file_sets.count).to eq 1
+      expect(raster_children.count).to eq 1
+
+      described_class.delete_all_from(resource.id.to_s)
+      reloaded = ChangeSetPersister.default.query_service.find_by(id: resource.id.to_s)
+      wayfinder = Wayfinder.for(reloaded)
+      file_sets = wayfinder.file_sets
+      raster_children = wayfinder.raster_resources
+      expect(file_sets.count).to eq 0
+      expect(raster_children.count).to eq 1
+    end
+  end
+end