implement soft validation of grant value

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

@@ -0,0 +1,18 @@
+class Form::Sales::Pages::GrantValueCheck < ::Form::Page
+  def initialize(id, hsh, subsection)
+    super
+    @id = "grant_value_check"
+    @depends_on = [
+      {
+        "grant_outside_common_range?" => true,
+      },
+    ]
+    @informative_text = {}
+  end
+
+  def questions
+    @questions ||= [
+      Form::Sales::Questions::GrantValueCheck.new(nil, nil, self),
+    ]
+  end
+end

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

@@ -0,0 +1,23 @@
+class Form::Sales::Questions::GrantValueCheck < ::Form::Question
+  def initialize(id, hsh, page)
+    super
+    @id = "grant_value_check"
+    @check_answer_label = "Grant value confirmation"
+    @header = "Are you sure? Grants are usually £9,000 - £16,000"
+    @type = "interruption_screen"
+    @answer_options = {
+      "0" => { "value" => "Yes" },
+      "1" => { "value" => "No" },
+    }
+    @hidden_in_check_answers = {
+      "depends_on" => [
+        {
+          "grant_value_check" => 0,
+        },
+        {
+          "grant_value_check" => 1,
+        },
+      ],
+    }
+  end
+end

app/models/form/sales/subsections/discounted_ownership_scheme.rb

@@ -11,6 +11,7 @@ class Form::Sales::Subsections::DiscountedOwnershipScheme < ::Form::Subsection
       Form::Sales::Pages::LivingBeforePurchase.new("living_before_purchase_discounted_ownership", nil, self),
       Form::Sales::Pages::AboutPriceRtb.new(nil, nil, self),
       Form::Sales::Pages::AboutPriceNotRtb.new(nil, nil, self),
+      Form::Sales::Pages::GrantValueCheck.new(nil, nil, self),
       Form::Sales::Pages::PurchasePrice.new("purchase_price_discounted_ownership", nil, self),
       Form::Sales::Pages::Mortgageused.new("mortgage_used_discounted_ownership", nil, self),
       Form::Sales::Pages::MortgageAmount.new("mortgage_amount_discounted_ownership", nil, self),

app/models/validations/sales/soft_validations.rb

@@ -42,4 +42,10 @@ module Validations::Sales::SoftValidations
 
     ((saledate.to_date - hodate.to_date).to_i / 365) >= 3
   end
+
+  def grant_outside_common_range?
+    return unless grant
+
+    !(9_000..16_000).cover? grant
+  end
 end