feat: infer mscharge if mscharge_known == No

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

@@ -2,17 +2,12 @@ class Form::Sales::Questions::LeaseholdCharges < ::Form::Question
   def initialize(id, hsh, page)
     super
     @id = "mscharge"
-    @check_answer_label = "Monthly rent"
+    @check_answer_label = "Monthly leasehold charges"
     @header = "Enter the total monthly charge"
     @type = "numeric"
     @page = page
-    @width = 2
+    @min = 0
+    @width = 5
     @prefix = "£"
-    @inferred_check_answers_value = {
-      "condition" => {
-        "mscharge_known" => 0,
-      },
-      "value" => 0,
-    }
   end
 end

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

@@ -2,7 +2,7 @@ class Form::Sales::Questions::LeaseholdChargesKnown < ::Form::Question
   def initialize(id, hsh, page)
     super
     @id = "mscharge_known"
-    @check_answer_label = "Monthly rent"
+    @check_answer_label = "Monthly leasehold charges known?"
     @header = "Does the property have any monthly leasehold charges?"
     @hint_text = "For example, service and management charges"
     @type = "radio"
@@ -13,9 +13,6 @@ class Form::Sales::Questions::LeaseholdChargesKnown < ::Form::Question
     }
     @hidden_in_check_answers = {
       "depends_on" => [
-        {
-          "mscharge_known" => 0,
-        },
         {
           "mscharge_known" => 1,
         },

app/models/sales_log.rb

@@ -20,6 +20,7 @@ class SalesLog < Log
   validates_with SalesLogValidator
   before_validation :set_derived_fields!
   before_validation :reset_invalidated_dependent_fields!
+  before_validation :process_mscharge_known_changes!, if: :mscharge_known_changed?
 
   scope :filter_by_year, ->(year) { where(saledate: Time.zone.local(year.to_i, 4, 1)...Time.zone.local(year.to_i + 1, 4, 1)) }
   scope :search_by, ->(param) { filter_by_id(param) }
@@ -115,4 +116,10 @@ class SalesLog < Log
   def right_to_buy?
     [9, 14, 27].include?(type)
   end
+
+  def process_mscharge_known_changes!
+    return if mscharge_known.blank?
+
+    self["mscharge"] = 0 if mscharge_known.zero?
+  end
 end