show item availability status

app/controllers/catalog_controller.rb

@@ -302,6 +302,7 @@ class CatalogController < ApplicationController
     config.add_summary_field "extent", field: "extent_ssm"
     config.add_summary_field "language", field: "language_ssim"
     config.add_summary_field "prefercite", field: "prefercite_html_tesm", helper_method: :render_html_tags
+    config.add_summary_field "availability", field: "availability_status", accessor: :availability_status
     config.add_summary_field "cult_sens_adv_notice",
       label: I18n.t("ead_notes.cultural_sens_adv_notice"),
       helper_method: :render_html_tags,

app/models/solr_document.rb

@@ -95,4 +95,12 @@ def wrap_in_paragraph(value)
       value
     end
   end
+
+  def availability_status
+    holdings, item = CatalogueServicesClient.new.get_item_ids(instance_id: self["folio_instance_id_ssi"])
+    p "solrdoc"
+    pp [holdings, item]
+
+    CatalogueServicesClient.new.get_requestable(instance_id: self["folio_instance_id_ssi"], holdings_id: holdings, item_id: item)
+  end
 end

app/services/catalogue_services_client.rb

@@ -0,0 +1,75 @@
+# frozen_string_literal: true
+
+class ServiceTokenError < StandardError; end
+
+class HoldingsRequestError < StandardError; end
+
+class ItemRequestError < StandardError; end
+
+class RequestDetailsError < StandardError; end
+
+class UserDetailsError < StandardError; end
+
+class CatalogueServicesClient
+  MAX_TOKEN_RETRIES = 3
+
+  def get_holdings(instance_id:)
+    conn = setup_connection
+
+    res = conn.get("/catalogue-services/folio/instance/#{instance_id}")
+    if res.status == 200
+      if res.body.present?
+        res.body["holdingsRecords"]
+      end
+    else
+      Rails.logger.error "Failed to retrieve holdings for #{instance_id}"
+      raise HoldingsRequestError.new("Failed to retrieve holdings for #{instance_id}")
+    end
+  rescue => e
+    Rails.logger.error "get_holdings - Failed to connect catalogue-service: #{e.message}"
+    raise HoldingsRequestError.new("Failed to retrieve holdings for #{instance_id}")
+  end
+
+  def get_holding(instance_id:, holdings_id:, item_id:)
+    all_holdings = get_holdings(instance_id: instance_id)
+
+    # find holdings record
+    holding = all_holdings.find { |h| h["id"] == holdings_id }
+
+    # find item record
+    item = holding["itemRecords"].find { |i| i["id"] == item_id }
+
+    [holding, item]
+  end
+
+  def get_requestable(instance_id:, holdings_id:, item_id:)
+    all_holdings = get_holdings(instance_id: instance_id)
+
+    # find holdings record
+    holding = all_holdings.find { |h| h["id"] == holdings_id }
+
+    # find item record
+    item = holding["itemRecords"].find { |i| i["id"] == item_id }
+
+    item["requestable"] ? item["displayStatus"] : "Not for loan"
+  end
+
+  def get_item_ids(instance_id:)
+    all_holdings = get_holdings(instance_id: instance_id)
+
+    item_id = all_holdings.first["itemRecords"].first["holdingsRecordId"] if all_holdings.first["itemRecords"].any?
+
+    holding_id = all_holdings.first["itemRecords"].first["id"] if all_holdings.first["itemRecords"].any?
+    p "catservices"
+    pp [item_id, holding_id]
+    [item_id, holding_id]
+  end
+
+  private
+
+  def setup_connection
+    Faraday.new(url: ENV["CATALOGUE_SERVICES_API_BASE_URL"]) do |f|
+      f.response :json
+    end
+  end
+end