feat: conditional question

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

@@ -1,7 +1,14 @@
 class Form::Sales::Pages::LivingBeforePurchase < ::Form::Page
   def questions
     @questions ||= [
-      Form::Sales::Questions::LivingBeforePurchase.new(nil, nil, self),
-    ]
+      living_before_purchase,
+      Form::Sales::Questions::LivingBeforePurchaseYears.new(nil, nil, self),
+    ].compact
+  end
+
+  def living_before_purchase
+    if form.start_date.year >= 2023
+      Form::Sales::Questions::LivingBeforePurchase.new(nil, nil, self)
+    end
   end
 end

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

@@ -1,15 +1,29 @@
 class Form::Sales::Questions::LivingBeforePurchase < ::Form::Question
   def initialize(id, hsh, page)
     super
-    @id = "proplen"
-    @check_answer_label = "Number of years living in the property before purchase"
-    @header = "How long did the buyer(s) live in the property before purchase?"
-    @hint_text = "You should round this up to the nearest year. If the buyers haven't been living in the property, enter '0'"
-    @type = "numeric"
-    @min = 0
-    @max = 80
-    @step = 1
-    @width = 5
-    @suffix = " years"
+    @id = "proplen_asked"
+    @check_answer_label = "Did the buyer live in the property before purchasing it?"
+    @header = "Did the buyer live in the property before purchasing it?"
+    @hint_text = nil
+    @type = "radio"
+    @answer_options = ANSWER_OPTIONS
+    @conditional_for = {
+      "proplen" => [0],
+    }
+    @hidden_in_check_answers = {
+      "depends_on" => [
+        {
+          "proplen_asked" => 0,
+        },
+        {
+          "proplen_asked" => 1,
+        },
+      ],
+    }
   end
+
+  ANSWER_OPTIONS = {
+    "0" => { "value" => "Yes" },
+    "1" => { "value" => "No" },
+  }.freeze
 end

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

@@ -0,0 +1,31 @@
+class Form::Sales::Questions::LivingBeforePurchaseYears < ::Form::Question
+  def initialize(id, hsh, page)
+    super
+    @id = "proplen"
+    @check_answer_label = "Number of years living in the property before purchase"
+    @header = header_text
+    @hint_text = hint_text
+    @type = "numeric"
+    @min = 0
+    @max = 80
+    @step = 1
+    @width = 5
+    @suffix = " years"
+  end
+
+  def header_text
+    if form.start_date.year >= 2023
+      "How long did they live there?"
+    else
+      "How long did the buyer(s) live in the property before purchase?"
+    end
+  end
+
+  def hint_text
+    if form.start_date.year >= 2023
+      "You should round up to the nearest year"
+    else
+      "You should round this up to the nearest year. If the buyers haven't been living in the property, enter '0'"
+    end
+  end
+end

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

@@ -1,6 +1,6 @@
 require "rails_helper"
 
-RSpec.describe Form::Sales::Questions::LivingBeforePurchase, type: :model do
+RSpec.describe Form::Sales::Questions::LivingBeforePurchaseYears, type: :model do
   subject(:question) { described_class.new(question_id, question_definition, page) }
 
   let(:question_id) { nil }