Adds Rollback functionality to HashedStorage migration

We are adding sidekiq workers and service classes to allow to rollback
a hashed storage migration. There are some refactoring involved as well
as part of the code can be reused by both the migration and the rollback
logic.

1 files changed, 37 insertions, 0 deletions

diff --git a/app/services/projects/hashed_storage/rollback_service.rb b/app/services/projects/hashed_storage/rollback_service.rb
new file mode 100644
index 00000000000..25767f5de5e
--- /dev/null
+++ b/app/services/projects/hashed_storage/rollback_service.rb
@@ -0,0 +1,37 @@
+# frozen_string_literal: true
+
+module Projects
+  module HashedStorage
+    class RollbackService < BaseService
+      attr_reader :logger, :old_disk_path
+
+      def initialize(project, old_disk_path, logger: nil)
+        @project = project
+        @old_disk_path = old_disk_path
+        @logger = logger || Rails.logger
+      end
+
+      def execute
+        # Rollback attachments from Hashed Storage to Legacy
+        if project.hashed_storage?(:attachments)
+          return false unless rollback_attachments
+        end
+
+        # Rollback repository from Hashed Storage to Legacy
+        if project.hashed_storage?(:repository)
+          rollback_repository
+        end
+      end
+
+      private
+
+      def rollback_attachments
+        HashedStorage::RollbackAttachmentsService.new(project, logger: logger).execute
+      end
+
+      def rollback_repository
+        HashedStorage::RollbackRepositoryService.new(project, old_disk_path, logger: logger).execute
+      end
+    end
+  end
+end