Add merged orgs sale dat validations

app/models/validations/sales/setup_validations.rb

@@ -24,6 +24,23 @@ module Validations::Sales::SetupValidations
     end
   end
 
+  def validate_merged_organisations_saledate(record)
+    return unless record.saledate && date_valid?("saledate", record)
+
+    if merged_owning_organisation_inactive?(record)
+      record.errors.add :saledate, I18n.t("validations.setup.saledate.invalid_merged_organisations_saledate",
+                                          owning_organisation: record.owning_organisation.name,
+                                          owning_organisation_merge_date: record.owning_organisation.merge_date.to_formatted_s(:govuk_date),
+                                          owning_absorbing_organisation: record.owning_organisation.absorbing_organisation.name)
+    end
+
+    if absorbing_owning_organisation_inactive?(record)
+      record.errors.add :saledate, I18n.t("validations.setup.saledate.invalid_absorbing_organisations_saledate",
+                                          owning_organisation: record.owning_organisation.name,
+                                          owning_organisation_available_from: record.owning_organisation.created_at.to_formatted_s(:govuk_date))
+    end
+  end
+
 private
 
   def active_collection_start_date
@@ -64,4 +81,12 @@ private
       )
     end
   end
+
+  def merged_owning_organisation_inactive?(record)
+    record.owning_organisation&.merge_date.present? && record.owning_organisation.merge_date < record.saledate
+  end
+
+  def absorbing_owning_organisation_inactive?(record)
+    record.owning_organisation&.absorbed_organisations.present? && record.owning_organisation.created_at > record.saledate
+  end
 end

config/locales/en.yml

@@ -239,6 +239,8 @@ en:
         previous_and_current_collection_year:
           "Enter a date within the %{previous_start_year_short}/%{previous_end_year_short} or %{previous_end_year_short}/%{current_end_year_short} collection years, which is between %{previous_start_year_long} and %{current_end_year_long}"
         year_not_two_digits: "Sale completion year must be 2 digits"
+        invalid_merged_organisations_saledate: "Enter a date when the owning organisation was active. %{owning_organisation} became inactive on %{owning_organisation_merge_date} and was replaced by %{owning_absorbing_organisation}."
+        invalid_absorbing_organisations_saledate:  "Enter a date when the owning organisation was active. %{owning_organisation} became active on %{owning_organisation_available_from}."
       type:
         percentage_bought_must_be_at_least_threshold: "The minimum increase in equity while staircasing is %{threshold}% for this shared ownership type"
 

spec/models/validations/sales/setup_validations_spec.rb

@@ -185,4 +185,52 @@ RSpec.describe Validations::Sales::SetupValidations do
       end
     end
   end
+
+  describe "#validate_merged_organisations_saledate" do
+    let(:record) { build(:sales_log) }
+    let(:absorbing_organisation) { create(:organisation, created_at: Time.zone.local(2023, 2, 1), name: "Absorbing org") }
+    let(:merged_organisation) { create(:organisation, name: "Merged org") }
+
+    around do |example|
+      Timecop.freeze(Time.zone.local(2023, 5, 1))
+      example.run
+      Timecop.return
+    end
+
+    before do
+      merged_organisation.update!(absorbing_organisation:, merge_date: Time.zone.local(2023, 2, 2))
+    end
+
+    context "and owning organisation is no longer active" do
+      it "does not allow saledate after organisation has been merged" do
+        record.saledate = Time.zone.local(2023, 3, 1)
+        record.owning_organisation_id = merged_organisation.id
+        setup_validator.validate_merged_organisations_saledate(record)
+        expect(record.errors["saledate"]).to include(match "Enter a date when the owning organisation was active. Merged org became inactive on 2 February 2023 and was replaced by Absorbing org.")
+      end
+
+      it "allows saledate before organisation has been merged" do
+        record.saledate = Time.zone.local(2023, 1, 1)
+        record.owning_organisation_id = merged_organisation.id
+        setup_validator.validate_merged_organisations_saledate(record)
+        expect(record.errors["saledate"]).to be_empty
+      end
+    end
+
+    context "and owning organisation is not yet active during the saledate" do
+      it "does not allow saledate before absorbing organisation has been created" do
+        record.saledate = Time.zone.local(2023, 1, 1)
+        record.owning_organisation_id = absorbing_organisation.id
+        setup_validator.validate_merged_organisations_saledate(record)
+        expect(record.errors["saledate"]).to include(match "Enter a date when the owning organisation was active. Absorbing org became active on 1 February 2023.")
+      end
+
+      it "allows saledate after absorbing organisation has been created" do
+        record.saledate = Time.zone.local(2023, 2, 2)
+        record.owning_organisation_id = absorbing_organisation.id
+        setup_validator.validate_merged_organisations_saledate(record)
+        expect(record.errors["saledate"]).to be_empty
+      end
+    end
+  end
 end