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

class StackmapService

  class Url

    def initialize(document:, loc:, cn: nil)

      @document = document

      @loc = loc

      @cn = cn

    end

    def url

      if valid?

        if StackmapService::Url.missing_stackmap_reserves.include? @loc

          StackmapService::Url.missing_stackmap_reserves[@loc]

        elsif stackmap_libs.include? lib

          stackmap_url

        else

          fallback_url

        end

      else

        fallback_url

      end

    end

    def preferred_callno

      if by_title_locations.include? @loc

        @document['title_display']

      else

        @cn || @document['call_number_browse_s']&.first

      end

    end

    def location_label

      return nil if holding_location.nil?

      holding_location[:label].presence || holding_location[:library][:label]

    end

    def self.missing_stackmap_reserves

      {

        'arch$res3hr' => 'https://library.princeton.edu/architecture',

        'stokes$respiapr' => 'https://library.princeton.edu/stokes',

        'plasma$res' => 'https://library.princeton.edu/plasma-physics',

        'lewis$gr' => 'https://library.princeton.edu/lewis'

      }

    end

    private

      def stackmap_url

        stackmap_url = 'https://princeton.stackmap.com/view/'

        stackmap_params = {

          callno:,

          location: @loc,

          library: holding_location[:library][:label]

        }

        "#{stackmap_url}?#{stackmap_params.to_query}"

      end

      def fallback_url

        "/catalog/#{@document.to_param}"

      end

      def bibid

        @bibid ||= @document[:id]

      end

      def callno

        @cn = preferred_callno

      end

      def stackmap_libs

        %w[arch eastasian engineer lewis mendel stokes firestone]

      end

      def by_title_locations

        %w[lewis$serial plasma$ps stokes$sprps stokes$spiaps]

      end

      def holding_location

        @holding_location ||= Bibdata.holding_locations[@loc]

      end

      def lib

        @lib ||= holding_location[:library][:code]

      end

      def valid?

        !holding_location.nil? && !@document.nil? && !callno.nil?

      end

  end

end