From d7483bcbe33c39859ebd8d3976807041d7d3ce19 Mon Sep 17 00:00:00 2001
From: Samuel Young <samuel.young@softwire.com>
Date: Thu, 29 Jan 2026 12:20:42 +0000
Subject: [PATCH] CLDC-4188: Infer referral_register for renewals

needs a new dependencies array for 2026

this handles inferring as well as clearing inferred answers if the prior answer changes
---
 .../lettings_log_variables.rb                 | 53 +++++++++++++++++--
 .../lettings/pages/referral_register_la.rb    |  2 +-
 .../lettings/questions/referral_register.rb   |  4 ++
 3 files changed, 55 insertions(+), 4 deletions(-)

diff --git a/app/models/derived_variables/lettings_log_variables.rb b/app/models/derived_variables/lettings_log_variables.rb
index 1c7f161c1..1abed45d8 100644
--- a/app/models/derived_variables/lettings_log_variables.rb
+++ b/app/models/derived_variables/lettings_log_variables.rb
@@ -33,7 +33,7 @@ module DerivedVariables::LettingsLogVariables
 
   def set_derived_fields!
     clear_inapplicable_derived_values!
-    set_encoded_derived_values!(DEPENDENCIES)
+    set_encoded_derived_values!(dependencies)
 
     if rsnvac.present?
       self.newprop = has_first_let_vacancy_reason? ? 1 : 2
@@ -182,7 +182,54 @@ module DerivedVariables::LettingsLogVariables
 
 private
 
-  DEPENDENCIES = [
+  def dependencies
+    if form.start_year_2026_or_later?
+      DEPENDENCIES_2026
+    else
+      DEPENDENCIES_PRE_2026
+    end
+  end
+
+  DEPENDENCIES_2026 = [
+    {
+      conditions: {
+        renewal: 1,
+      },
+      derived_values: {
+        referral_register: 1, # new in 2026
+        waityear: 2,
+        offered: 0,
+        rsnvac: 14,
+        first_time_property_let_as_social_housing: 0,
+      },
+    },
+    {
+      conditions: {
+        net_income_known: 2,
+      },
+      derived_values: {
+        incref: 1,
+      },
+    },
+    {
+      conditions: {
+        net_income_known: 0,
+      },
+      derived_values: {
+        incref: 0,
+      },
+    },
+    {
+      conditions: {
+        net_income_known: 1,
+      },
+      derived_values: {
+        incref: 2,
+      },
+    },
+  ].freeze
+
+  DEPENDENCIES_PRE_2026 = [
     {
       conditions: {
         renewal: 1,
@@ -223,7 +270,7 @@ private
   ].freeze
 
   def clear_inapplicable_derived_values!
-    reset_invalidated_derived_values!(DEPENDENCIES)
+    reset_invalidated_derived_values!(dependencies)
     if (startdate_changed? || renewal_changed?) && (renewal_was == 1 && startdate_was&.between?(Time.zone.local(2021, 4, 1), Time.zone.local(2022, 3, 31)))
       self.underoccupation_benefitcap = nil
     end
diff --git a/app/models/form/lettings/pages/referral_register_la.rb b/app/models/form/lettings/pages/referral_register_la.rb
index ae1266b8e..ee570f1cb 100644
--- a/app/models/form/lettings/pages/referral_register_la.rb
+++ b/app/models/form/lettings/pages/referral_register_la.rb
@@ -10,6 +10,6 @@ class Form::Lettings::Pages::ReferralRegisterLa < ::Form::Page
   end
 
   def routed_to?(log, _current_user)
-    log.owning_organisation&.la?
+    log.owning_organisation&.la? && !log.is_renewal?
   end
 end
diff --git a/app/models/form/lettings/questions/referral_register.rb b/app/models/form/lettings/questions/referral_register.rb
index 214748323..d6e184758 100644
--- a/app/models/form/lettings/questions/referral_register.rb
+++ b/app/models/form/lettings/questions/referral_register.rb
@@ -38,5 +38,9 @@ class Form::Lettings::Questions::ReferralRegister < ::Form::Question
     end
   end
 
+  def derived?(log)
+    log.is_renewal?
+  end
+
   QUESTION_NUMBER_FROM_YEAR = { 2026 => 84 }.freeze
 end