CLDC-3169: Infer soctenant from prevten / prevtenbuy2 (#2200)

* CLDC-3169: Infer soctentant from prevten

* Avoid default soctenant value

* Explicitly ensure soctenant nil for non shared ownership in bulk upload

* Fix linting

app/models/derived_variables/sales_log_variables.rb

@@ -24,6 +24,10 @@ module DerivedVariables::SalesLogVariables
     self.hhmemb = number_of_household_members
     self.hhtype = household_type
 
+    if saledate && form.start_year_after_2024?
+      self.soctenant = soctenant_from_prevten_values
+    end
+
     self.uprn_known = 0 if address_answered_without_uprn?
 
     if uprn_known&.zero?
@@ -157,4 +161,14 @@ private
   def address_answered_without_uprn?
     [address_line1, town_or_city].all?(&:present?) && uprn.nil? && form.start_date.year >= 2023
   end
+
+  def soctenant_from_prevten_values
+    return unless prevten && shared_ownership_scheme?
+
+    prevten_was_social_housing? ? 1 : 2
+  end
+
+  def prevten_was_social_housing?
+    [1, 2].include?(prevten) || [1, 2].include?(prevtenbuy2)
+  end
 end

app/models/form/sales/pages/buyer_previous.rb

@@ -2,7 +2,7 @@ class Form::Sales::Pages::BuyerPrevious < ::Form::Page
   def initialize(id, hsh, subsection, joint_purchase:)
     super(id, hsh, subsection)
     @joint_purchase = joint_purchase
-    @depends_on = [{ "joint_purchase?" => joint_purchase }]
+    @depends_on = [{ "joint_purchase?" => joint_purchase, "soctenant_is_inferred?" => false }]
   end
 
   def questions

app/models/form/sales/questions/buyer_previous.rb

@@ -21,4 +21,8 @@ class Form::Sales::Questions::BuyerPrevious < ::Form::Question
       "2" => { "value" => "No" },
     }
   end
+
+  def derived?
+    form.start_year_after_2024?
+  end
 end

app/models/sales_log.rb

@@ -470,6 +470,10 @@ class SalesLog < Log
      form.start_date.year >= 2023 && uprn.present? ? "uprn" : nil].compact
   end
 
+  def soctenant_is_inferred?
+    form.start_year_after_2024?
+  end
+
   def duplicates
     SalesLog.where.not(duplicate_set_id: nil).where(duplicate_set_id:).where.not(id:)
   end

app/services/bulk_upload/sales/year2024/row_parser.rb

@@ -717,7 +717,6 @@ private
       lanomagr: %i[field_97],
       frombeds: %i[field_98],
       fromprop: %i[field_99],
-      soctenant: %i[field_98 field_99 field_100],
       value: %i[field_101 field_114 field_125],
       equity: %i[field_102],
       mortgage: %i[field_104 field_118 field_127],
@@ -927,7 +926,7 @@ private
     attributes["stairbought"] = field_87
     attributes["stairowned"] = field_88
     attributes["socprevten"] = field_100
-    attributes["soctenant"] = [attributes["socprevten"], attributes["frombeds"], attributes["fromprop"]].any?(&:present?) ? 1 : 0
+    attributes["soctenant"] = infer_soctenant_from_prevten_and_prevtenbuy2
     attributes["mortgageused"] = mortgageused
 
     attributes["uprn"] = field_22
@@ -1123,6 +1122,16 @@ private
     0 if field_62 == 1
   end
 
+  def infer_soctenant_from_prevten_and_prevtenbuy2
+    return unless shared_ownership?
+
+    if [1, 2].include?(field_61) || [1, 2].include?(field_71.to_i)
+      1
+    else
+      2
+    end
+  end
+
   def block_log_creation!
     self.block_log_creation = true
   end

spec/models/form/sales/pages/buyer_previous_spec.rb

@@ -42,13 +42,13 @@ RSpec.describe Form::Sales::Pages::BuyerPrevious, type: :model do
     let(:joint_purchase) { true }
 
     it "has the correct depends on" do
-      expect(page.depends_on).to eq([{ "joint_purchase?" => true }])
+      expect(page.depends_on).to eq([{ "joint_purchase?" => true, "soctenant_is_inferred?" => false }])
     end
   end
 
   context "when sales is not a joint purchase" do
     it "has the correct depends on" do
-      expect(page.depends_on).to eq([{ "joint_purchase?" => false }])
+      expect(page.depends_on).to eq([{ "joint_purchase?" => false, "soctenant_is_inferred?" => false }])
     end
   end
 

spec/models/form/sales/questions/buyer_previous_spec.rb

@@ -6,8 +6,15 @@ RSpec.describe Form::Sales::Questions::BuyerPrevious, type: :model do
   let(:question_id) { nil }
   let(:question_definition) { nil }
   let(:page) { instance_double(Form::Page) }
+  let(:subsection) { instance_double(Form::Subsection) }
+  let(:form) { instance_double(Form) }
   let(:joint_purchase) { true }
 
+  before do
+    allow(page).to receive(:subsection).and_return(subsection)
+    allow(subsection).to receive(:form).and_return(form)
+  end
+
   it "has correct page" do
     expect(question.page).to eq(page)
   end
@@ -42,10 +49,6 @@ RSpec.describe Form::Sales::Questions::BuyerPrevious, type: :model do
     expect(question.type).to eq("radio")
   end
 
-  it "is not marked as derived" do
-    expect(question.derived?).to be false
-  end
-
   it "has the correct displayed_answer_options" do
     expect(question.displayed_answer_options(nil)).to eq({
       "1" => { "value" => "Yes" },
@@ -68,4 +71,24 @@ RSpec.describe Form::Sales::Questions::BuyerPrevious, type: :model do
   it "has the correct hint" do
     expect(question.hint_text).to eq(nil)
   end
+
+  context "when form year is before 2024" do
+    before do
+      allow(form).to receive(:start_year_after_2024?).and_return(false)
+    end
+
+    it "is not marked as derived" do
+      expect(question.derived?).to be false
+    end
+  end
+
+  context "when form year is >= 2024" do
+    before do
+      allow(form).to receive(:start_year_after_2024?).and_return(true)
+    end
+
+    it "is marked as derived" do
+      expect(question.derived?).to be true
+    end
+  end
 end

spec/services/bulk_upload/sales/year2024/row_parser_spec.rb

@@ -1264,10 +1264,56 @@ RSpec.describe BulkUpload::Sales::Year2024::RowParser do
     end
 
     describe "#soctenant" do
-      let(:attributes) { setup_section_params.merge({ field_99: "1" }) }
+      context "when discounted ownership" do
+        let(:attributes) { valid_attributes.merge({ field_8: "2" }) }
 
-      it "is correctly set" do
-        expect(parser.log.soctenant).to be(1)
+        it "is set to nil" do
+          expect(parser.log.soctenant).to be_nil
+        end
+      end
+
+      context "when outright sale" do
+        let(:attributes) { valid_attributes.merge({ field_8: "3" }) }
+
+        it "is set to nil" do
+          expect(parser.log.soctenant).to be_nil
+        end
+      end
+
+      context "when shared ownership" do
+        context "when prevten is a social housing type" do
+          let(:attributes) { valid_attributes.merge({ field_8: "1", field_61: "1" }) }
+
+          it "is set to yes" do
+            expect(parser.log.soctenant).to be(1)
+          end
+        end
+
+        context "when prevten is not a social housing type" do
+          context "and prevtenbuy2 is a social housing type" do
+            let(:attributes) { valid_attributes.merge({ field_8: "1", field_61: "3", field_71: "2" }) }
+
+            it "is set to yes" do
+              expect(parser.log.soctenant).to be(1)
+            end
+          end
+
+          context "and prevtenbuy2 is not a social housing type" do
+            let(:attributes) { valid_attributes.merge({ field_8: "1", field_61: "3", field_71: "4" }) }
+
+            it "is set to no" do
+              expect(parser.log.soctenant).to be(2)
+            end
+          end
+
+          context "and prevtenbuy2 is blank" do
+            let(:attributes) { valid_attributes.merge({ field_8: "1", field_61: "3", field_71: nil }) }
+
+            it "is set to no" do
+              expect(parser.log.soctenant).to be(2)
+            end
+          end
+        end
       end
     end