fix refactor expire at

lib/templates.rb

@@ -1,6 +1,25 @@
 # frozen_string_literal: true
 
 module Templates
+  EXPIRATION_DURATIONS = {
+    one_day: 1.day,
+    two_days: 2.days,
+    three_days: 3.days,
+    four_days: 4.days,
+    five_days: 5.days,
+    six_days: 6.days,
+    seven_days: 7.days,
+    eight_days: 8.days,
+    nine_days: 9.days,
+    ten_days: 10.days,
+    two_weeks: 14.days,
+    three_weeks: 21.days,
+    four_weeks: 28.days,
+    one_month: 1.month,
+    two_months: 2.months,
+    three_months: 3.months
+  }.with_indifferent_access.freeze
+
   module_function
 
   def build_field_areas_index(fields)
@@ -30,4 +49,17 @@ module Templates
         item['linked_to_uuid'].blank? && item['is_requester'].blank? && item['email'].blank?
     end
   end
+
+  def build_default_expire_at(template)
+    default_expire_at_duration = template.preferences['default_expire_at_duration'].presence
+    default_expire_at = template.preferences['default_expire_at'].presence
+
+    return if default_expire_at_duration.blank?
+
+    if default_expire_at_duration == 'specified_date' && default_expire_at.present?
+      Time.zone.parse(default_expire_at)
+    elsif EXPIRATION_DURATIONS[default_expire_at_duration]
+      Time.current + EXPIRATION_DURATIONS[default_expire_at_duration]
+    end
+  end
 end