pulibrary / orangelight / 0e37073d-109c-440c-949f-49d2aa86311b

require 'openurl/context_object'

module Blacklight

  module Marc

    class CtxBuilder

      def initialize(document:, format:)

        @document = document

        @format = format

      end

      def build

        ctx.referent.set_format(genre)

        apply_metadata

        ctx

      end

      def ctx

        @ctx ||= OpenURL::ContextObject.new

      end

      private

        def apply_metadata

          mapping.each do |key, value|

            ctx.referent.set_metadata(key.to_s, value)

          end

          add_identifiers

        end

        def add_identifiers

          id = @document['id']

          ctx.referent.add_identifier("https://catalog.princeton.edu/catalog/#{id}")

          ctx.referrer.add_identifier('info:sid/catalog.princeton.edu:generator')

          ctx.referent.add_identifier("info:oclcnum/#{@document['oclc_s'].first}") unless @document['oclc_s'].nil?

          ctx.referent.add_identifier("info:lccn/#{@document['lccn_s'].first}") unless @document['lccn_s'].nil?

        end

        def mapping

          {

            genre:,

            title:,

            creator: author,

            pub: publisher,

            format: @format,

            issn:,

            isbn:,

            date:

          }

        end

        def author

          @document['author_citation_display']&.first

        end

        def date

          @document['pub_date_display']&.first

        end

        def genre

          @format == 'conference' ? @format : 'unknown'

        end

        def isbn

          @document['isbn_s']&.first

        end

        def issn

          @document['issn_s']&.first

        end

        def oclc

          @document['oclc_s']&.first

        end

        def lccn

          @document['lccn_s']&.first

        end

        def publisher

          @document['pub_citation_display']&.first

        end

        def title

          @document['title_citation_display']&.first&.truncate(250)

        end

    end

  end

end