created birth date validator

app/models/contact/ident.rb

@@ -13,6 +13,7 @@ class Contact::Ident
   validates :type, presence: true, inclusion: { in: proc { types } }
   validates :country_code, presence: true, iso31661_alpha2: true
   validates_with MismatchValidator
+  validates_with BirthDateValidator, if: :birthday?
 
   def self.epp_code_map
     {
@@ -26,6 +27,7 @@ class Contact::Ident
         [:code, :invalid_national_id],
         [:code, :invalid_reg_no],
         [:code, :invalid_iso8601_date],
+        [:code, :invalid_birth_date],
         [:country_code, :invalid_iso31661_alpha2]
       ]
     }

app/models/epp/contact.rb

@@ -8,9 +8,6 @@ class Epp::Contact < Contact
   # disable STI, there is type column present
   self.inheritance_column = :sti_disabled
 
-  VALID_BIRTH_DATE_FROM = Time.zone.today - 150.years
-  VALID_BIRTH_DATE_TO = Time.zone.tomorrow
-
   before_validation :manage_permissions
 
   def manage_permissions
@@ -19,28 +16,6 @@ class Epp::Contact < Contact
     throw(:abort)
   end
 
-  validate :validate_birthday_ident
-
-  def validate_birthday_ident
-    return unless Depp::Contact::SELECTION_TYPES[2].include?(ident_type)
-
-    begin
-      Date.parse(ident)
-    rescue ArgumentError
-      add_epp_error('2308', nil, nil, I18n.t('epp.contacts.errors.valid_ident_date_format'))
-      @error = true
-      return
-    end
-
-    contact_ident_date = Date.parse(ident)
-    valid_time_range = VALID_BIRTH_DATE_FROM...VALID_BIRTH_DATE_TO
-    return if valid_time_range.cover?(contact_ident_date)
-
-    add_epp_error('2308', nil, nil, I18n.t('epp.contacts.errors.valid_ident_date_range'))
-    @error = true
-    nil
-  end
-
   class << self
     # support legacy search
     def find_by_epp_code(code)