sul-dlss/sdr-client

# frozen_string_literal: true

require 'digest'

module SdrClient
  class RedesignedClient
    DirectUploadRequest = Struct.new(:checksum, :byte_size, :content_type, :filename, keyword_init: true) do
      def self.from_file(path, file_name:, content_type:)
        checksum = Digest::MD5.file(path).base64digest
        new(checksum: checksum,
            byte_size: ::File.size(path),
            content_type: clean_and_translate_content_type(content_type),
            filename: file_name)
      end

      def to_h
        {
          blob: { filename: filename, byte_size: byte_size, checksum: checksum,
                  content_type: self.class.clean_and_translate_content_type(content_type) }
        }
      end

      def to_json(*_args)
        JSON.generate(to_h)
      end

      # Invalid JSON files with a content type of application/json will trigger 400 errors in sdr-api
      # since they are parsed and rejected (not clear why and what part of the stack is doing this).
      # The work around is to change the content_type for any JSON files to a custom stand-in and
      # specific to avoid the parsing, and then have this translated back to application/json after .
      # upload is complete. There is a corresponding change in sdr-api to translate the content_type back
      # before the Cocina is saved.
      # See https://github.com/sul-dlss/happy-heron/issues/3075 for the original bug report
      # See https://github.com/sul-dlss/sdr-api/pull/585 for the change in sdr-api
      def self.clean_and_translate_content_type(content_type)
        return 'application/octet-stream' if content_type.blank?

        # ActiveStorage is expecting "application/x-stata-dta" not "application/x-stata-dta;version=14"
        content_type = content_type.split(';').first

        content_type == 'application/json' ? 'application/x-stanford-json' : content_type
      end
    end
  end
end