CLDC-4188: Add LA flow

splits the referral_register question and pages into two, as its not easy to have the answers be dependent

if the owning organisation changes type, reset the referral register question. the other questions do not need to be reset as they are no longer routed to

app/models/form/lettings/pages/referral_noms.rb

@@ -8,4 +8,8 @@ class Form::Lettings::Pages::ReferralNoms < ::Form::Page
   def questions
     @questions ||= [Form::Lettings::Questions::ReferralNoms.new(nil, nil, self)]
   end
+
+  def routed_to?(log, _current_user)
+    log.owning_organisation&.prp?
+  end
 end

app/models/form/lettings/pages/referral_org.rb

@@ -8,4 +8,8 @@ class Form::Lettings::Pages::ReferralOrg < ::Form::Page
   def questions
     @questions ||= [Form::Lettings::Questions::ReferralOrg.new(nil, nil, self)]
   end
+
+  def routed_to?(log, _current_user)
+    log.owning_organisation&.prp?
+  end
 end

app/models/form/lettings/pages/referral_register.rb

@@ -1,11 +0,0 @@
-# added in 2026
-class Form::Lettings::Pages::ReferralRegister < ::Form::Page
-  def initialize(id, hsh, subsection)
-    super
-    @id = "referral_register"
-  end
-
-  def questions
-    @questions ||= [Form::Lettings::Questions::ReferralRegister.new(nil, nil, self)]
-  end
-end

app/models/form/lettings/pages/referral_register_la.rb

@@ -0,0 +1,15 @@
+# added in 2026
+class Form::Lettings::Pages::ReferralRegisterLa < ::Form::Page
+  def initialize(id, hsh, subsection)
+    super
+    @id = "referral_register_la"
+  end
+
+  def questions
+    @questions ||= [Form::Lettings::Questions::ReferralRegister.new(nil, nil, self, :la)]
+  end
+
+  def routed_to?(log, _current_user)
+    log.owning_organisation&.la?
+  end
+end

app/models/form/lettings/pages/referral_register_prp.rb

@@ -0,0 +1,15 @@
+# added in 2026
+class Form::Lettings::Pages::ReferralRegisterPrp < ::Form::Page
+  def initialize(id, hsh, subsection)
+    super
+    @id = "referral_register_prp"
+  end
+
+  def questions
+    @questions ||= [Form::Lettings::Questions::ReferralRegister.new(nil, nil, self, :prp)]
+  end
+
+  def routed_to?(log, _current_user)
+    log.owning_organisation&.prp?
+  end
+end

app/models/form/lettings/questions/referral_register.rb

@@ -1,23 +1,41 @@
 # added in 2026
 class Form::Lettings::Questions::ReferralRegister < ::Form::Question
-  def initialize(id, hsh, page)
-    super
+  def initialize(id, hsh, page, provider_type)
+    super(id, hsh, page)
     @id = "referral_register"
     @copy_key = "lettings.household_situation.referral.register"
     @type = "radio"
     @check_answers_card_number = 0
     @question_number = QUESTION_NUMBER_FROM_YEAR[form.start_date.year] || QUESTION_NUMBER_FROM_YEAR[QUESTION_NUMBER_FROM_YEAR.keys.max]
+    @provider_type = provider_type
   end
 
   def answer_options
-    {
-      "1" => {
-        "value" => "Answer A",
-      },
-      "2" => {
-        "value" => "Answer B",
-      },
-    }.freeze
+    if @provider_type == :la
+      {
+        "1" => {
+          "value" => "Renewal to the same tenant in the same property",
+        },
+        "2" => {
+          "value" => "Internal transfer from another property owned by the same local authority - for existing social tenants only",
+        },
+        "3" => {
+          "value" => "From a housing register (waiting list)",
+        },
+        "4" => {
+          "value" => "Tenant applied directly (not via a nomination or housing register)",
+        },
+      }.freeze
+    else
+      {
+        "1" => {
+          "value" => "Answer A",
+        },
+        "2" => {
+          "value" => "Answer B",
+        },
+      }.freeze
+    end
   end
 
   QUESTION_NUMBER_FROM_YEAR = { 2026 => 84 }.freeze

app/models/form/lettings/subsections/household_situation.rb

@@ -28,7 +28,8 @@ class Form::Lettings::Subsections::HouseholdSituation < ::Form::Subsection
   def referral_questions
     if form.start_year_2026_or_later?
       [
-        Form::Lettings::Pages::ReferralRegister.new(nil, nil, self),
+        Form::Lettings::Pages::ReferralRegisterLa.new(nil, nil, self),
+        Form::Lettings::Pages::ReferralRegisterPrp.new(nil, nil, self),
         Form::Lettings::Pages::ReferralNoms.new(nil, nil, self),
         Form::Lettings::Pages::ReferralOrg.new(nil, nil, self),
       ]

app/models/lettings_log.rb

@@ -35,6 +35,7 @@ class LettingsLog < Log
   before_validation :set_derived_fields!
   before_validation :process_uprn_change!, if: :should_process_uprn_change?
   before_validation :process_address_change!, if: :should_process_address_change?
+  before_validation :reset_referral_register!, if: :should_reset_referral_register?
 
   belongs_to :scheme, optional: true
   belongs_to :location, optional: true
@@ -947,4 +948,16 @@ private
       uprn_selection_changed? || startdate_changed?
     end
   end
+
+  def reset_referral_register!
+    self.referral_register = nil
+  end
+
+  def should_reset_referral_register?
+    return unless owning_organisation_id_changed? && owning_organisation_id && owning_organisation_id_was
+
+    old_owning_organisation = Organisation.find(owning_organisation_id_was)
+
+    old_owning_organisation.provider_type != owning_organisation.provider_type
+  end
 end