feat: add one year gap exchange/completion validations

app/models/validations/sales/sale_information_validations.rb

@@ -15,13 +15,18 @@ module Validations::Sales::SaleInformationValidations
     end
   end
 
-  def validate_exchange_date_before_completion_date(record)
+  def validate_exchange_and_completion_date(record)
     return unless record.exdate && record.saledate
 
     if record.exdate > record.saledate
       record.errors.add :exdate, I18n.t("validations.sale_information.completion_exchange.exchange_before_completion")
       record.errors.add :saledate, I18n.t("validations.sale_information.completion_exchange.completion_after_exchange")
     end
+
+    if record.exdate < record.saledate - 1.year
+      record.errors.add :exdate, I18n.t("validations.sale_information.completion_exchange.exchange_after_one_year_before_completion")
+      record.errors.add :saledate, I18n.t("validations.sale_information.completion_exchange.completion_before_one_year_after_exchange")
+    end
   end
 
   def validate_previous_property_unit_type(record)

config/locales/en.yml

@@ -422,7 +422,8 @@ en:
       completion_exchange:
         exchange_before_completion: "Exchange date must be before completion date"
         completion_after_exchange: "Completion date must be after exchange date"
-
+        exchange_after_one_year_before_completion: "Exchange date must be less than 1 year before completion date"
+        completion_before_one_year_after_exchange: "Completion date must be less than 1 year after exchange date"
   soft_validations:
     net_income:
       title_text: "Net income is outside the expected range based on the lead tenant’s working situation"