gitlab-org--gitlab-foss/lib/gitlab/import_export/uploads_manager.rb

module Gitlab
  module ImportExport
    class UploadsManager
      include Gitlab::ImportExport::CommandLineUtil

      UPLOADS_BATCH_SIZE = 100

      def initialize(project:, shared:, relative_export_path: 'uploads', from: nil)
        @project = project
        @shared = shared
        @relative_export_path = relative_export_path
        @from = from || default_uploads_path
      end

      def save
        copy_files(@from, uploads_export_path) if File.directory?(@from)

        if File.file?(@from) && @relative_export_path == 'avatar'
          copy_files(@from, File.join(uploads_export_path, @project.avatar.filename))
        end

        copy_from_object_storage

        true
      rescue => e
        @shared.error(e)
        false
      end

      def restore
        Dir["#{uploads_export_path}/**/*"].each do |upload|
          next if File.directory?(upload)

          add_upload(upload)
        end

        true
      rescue => e
        @shared.error(e)
        false
      end

      private

      def add_upload(upload)
        uploader_context = FileUploader.extract_dynamic_path(upload).named_captures.symbolize_keys

        UploadService.new(@project, File.open(upload, 'r'), FileUploader, uploader_context).execute
      end

      def copy_from_object_storage
        return unless Gitlab::ImportExport.object_storage?

        each_uploader do |uploader|
          next unless uploader.file
          next if uploader.upload.local? # Already copied, using  the old  method

          download_and_copy(uploader)
        end
      end

      def default_uploads_path
        FileUploader.absolute_base_dir(@project)
      end

      def uploads_export_path
        @uploads_export_path ||= File.join(@shared.export_path, @relative_export_path)
      end

      def each_uploader
        avatar_path = @project.avatar&.upload&.path

        if @relative_export_path == 'avatar'
          yield(@project.avatar)
        else
          project_uploads_except_avatar(avatar_path).find_each(batch_size: UPLOADS_BATCH_SIZE) do |upload|
            yield(upload.build_uploader)
          end
        end
      end

      def project_uploads_except_avatar(avatar_path)
        return @project.uploads unless avatar_path

        @project.uploads.where("path != ?", avatar_path)
      end

      def download_and_copy(upload)
        secret = upload.try(:secret) || ''
        upload_path = File.join(uploads_export_path, secret, upload.filename)

        mkdir_p(File.join(uploads_export_path, secret))

        File.open(upload_path, 'w') do |file|
          # Download (stream) file from the uploader's location
          IO.copy_stream(URI.parse(upload.file.url).open, file)
        end
      end
    end
  end
end