handles SeeInstead xref

lib/models/subject_item.rb

@@ -1,7 +1,8 @@
 class SubjectItem
   attr_reader :browse_doc
   def self.for(browse_doc:, exact_match:)
-    if browse_doc.key?("broader") || browse_doc.key?("narrower") || browse_doc.key?("see_also")
+    if ["broader", "narrower", "see_also", "see_instead"]
+        .any? { |xref_kind| browse_doc.key?(xref_kind) }
       SubjectItemWithCrossReferences.new(browse_doc: browse_doc, exact_match: exact_match)
     else
       SubjectItem.new(browse_doc: browse_doc, exact_match: exact_match)
@@ -66,11 +67,13 @@ def has_cross_references?
   end
 
   def cross_references
-    # see_instead because this still needs to be changed in solr
-    broader = BroaderTerms.new(@browse_doc["broader"])
-    narrower = NarrowerTerms.new(@browse_doc["narrower"])
-    see_also = SeeAlsoTerms.new(@browse_doc["see_also"])
-    OpenStruct.new(broader: broader, narrower: narrower, see_also: see_also)
+    xrefs = {}
+    [:broader, :narrower, :see_also, :see_instead].each do |xref|
+      # get the terms class from the xref name (example: BroaderTerms)
+      terms_klass = Module.const_get "#{xref.to_s.split("_").collect(&:capitalize).join}Terms"
+      xrefs[xref] = terms_klass.new(@browse_doc[xref.to_s])
+    end
+    OpenStruct.new(**xrefs)
   end
 end
 
@@ -148,6 +151,20 @@ def summary_text_open
   end
 end
 
+class SeeInsteadTerms < SubjectItemCrossReferences
+  def text
+    "See instead"
+  end
+
+  def summary_text_closed
+    summary_text(true, "see instead")
+  end
+
+  def summary_text_open
+    summary_text(false, "see instead")
+  end
+end
+
 class SubjectItemCrossReference
   attr_reader :subject, :count
   def initialize(subject)

spec/fixtures/subject_results.json

@@ -34,6 +34,14 @@
         "browse_field":"subject",
         "json":"{\"id\":\"http://id.loc.gov/authorities/subjects/sh85000887\",\"subject\":\"Adivasis\",\"narrower\":{},\"broader\":{},\"see_also\":{\"http://id.loc.gov/authorities/subjects/sh85090174\":{\"id\":\"http://id.loc.gov/authorities/subjects/sh85090174\",\"label\":\"Indigenous peoples\",\"count\":441,\"match_text\":\"indigenous peoples\",\"json_class\":\"AuthorityBrowse::GenericXRef\"}},\"incoming_see_also\":null}",
         "_version_":1757646983890206728,
-        "date_of_index":"2023-02-12T00:00:00Z"}
-  ]
+        "date_of_index":"2023-02-12T00:00:00Z"},
+	{
+        "id":"illegal aliens\u001fsubject",
+        "loc_id":"http://id.loc.gov/authorities/subjects/sh85003553",
+        "browse_field":"subject",
+        "term":"Illegal aliens",
+        "count":0,
+        "date_of_index":"2024-05-22T00:00:00Z",
+	"see_instead":["Undocumented immigrants||250"],
+        "_version_":1799776250073448465}]
   }}

spec/models/subject_item_spec.rb

@@ -208,4 +208,36 @@
       expect(see_also.first.url).to include("subject?query=")
     end
   end
+  context "#cross_references.see_instead" do
+    before(:each) do
+      @params = {
+        browse_doc: @items[2],
+        exact_match: false
+      }
+    end
+    subject do
+      described_class.new(**@params)
+    end
+    let :see_instead do
+      subject.cross_references.see_instead.leading
+    end
+    it "has at least one cross reference of 'see_instead'" do
+      expect(see_instead).not_to be_nil
+    end
+    it "has a false 'heading_link?'" do
+      expect(see_instead.first.heading_link?).to eq(false)
+    end
+    it "has a subject_display" do
+      expect(see_instead.first.subject_display).to eq("Undocumented immigrants")
+    end
+    it "has a count" do
+      expect(see_instead.first.count).to eq("250")
+    end
+    it "displays records" do
+      expect(see_instead.first.record_text).to eq("250 records")
+    end
+    it "has a url that's a subject query" do
+      expect(see_instead.first.url).to include("subject?query=")
+    end
+  end
 end