scotdalton/exlibris-aleph

module Exlibris
  module Aleph
    module Table
      module Patron
        class CirculationPolicies < Table::Base
          def all
            @all ||= begin
              Hash[
                admin_libraries.map do |admin_library|
                  [admin_library, Reader::PatronCirculationPolicies.new(admin_library).all]
                end
              ]
            end
          end

          def find_by_identifier(identifier)
            unless identifier.is_a?(Aleph::Patron::CirculationPolicy::Identifier)
              raise ArgumentError.new("Expecting #{identifier} to be a CirculationPolicy::Identifier")
            end
            sub_library = identifier.sub_library
            circulation_policy = _find_by_identifier(identifier)
            # Try with a "generic" patron status
            if circulation_policy.nil?
              generic_status_identifier =
                Aleph::Patron::CirculationPolicy::Identifier.new(generic_status, sub_library)
              circulation_policy = _find_by_identifier(generic_status_identifier)
            end
            circulation_policy
          end

          private
          def generic_status
            @generic_status ||= Aleph::Patron::Status.new('##')
          end

          def _find_by_identifier(identifier)
            sub_library = identifier.sub_library
            admin_library = sub_library.admin_library
            all[admin_library].find do |circulation_policy|
              circulation_policy.identifier == identifier
            end
          end
        end
      end
    end
  end
end