Improve Ident validation, extract Ident from Contact

#569

app/validators/contact/ident/code_validator.rb

@@ -0,0 +1,29 @@
+class Contact::Ident::CodeValidator < ActiveModel::EachValidator
+  def validate_each(record, attribute, value)
+    if record.country_code == 'EE'
+      if record.national_id?
+        record.errors.add(attribute,
+                          :invalid_national_id,
+                          country: record.country) unless valid_national_id_ee?(value)
+      end
+
+      if record.reg_no?
+        validator = ActiveModel::Validations::FormatValidator.new(with: reg_no_ee_format,
+                                                                  attributes: attribute,
+                                                                  message: :invalid_reg_no,
+                                                                  country: record.country)
+        validator.validate(record)
+      end
+    end
+  end
+
+  private
+
+  def reg_no_ee_format
+    /\A[0-9]{8}\z/
+  end
+
+  def valid_national_id_ee?(ident)
+    Isikukood.new(ident).valid?
+  end
+end