add support for greece vat numbers

Plugin/Service/Validate/ValidationService.php

@@ -0,0 +1,31 @@
+<?php
+
+namespace Dutchento\Vatfallback\Plugin\Service\Validate;
+
+use Dutchento\Vatfallback\Service\Validate\ValidationServiceInterface;
+
+class ValidationService
+{
+ public function beforeValidateVATNumber(ValidationServiceInterface $subject, string $vatNumber, string $countryIso2): array
+ {
+ return [$vatNumber, $this->getCountryCodeForVatNumber($countryIso2)];
+ }
+
+ /**
+ * Returns the country code to use in the VAT number which is not always the same as the normal country code
+ *
+ * @param string $countryCode
+ * @return string
+ */
+ private function getCountryCodeForVatNumber(string $countryCode): string
+ {
+ // Greece uses a different code for VAT numbers then its country code
+ // See: http://ec.europa.eu/taxation_customs/vies/faq.html#item_11
+ // And https://en.wikipedia.org/wiki/VAT_identification_number:
+ // "The full identifier starts with an ISO 3166-1 alpha-2 (2 letters) country code
+ // (except for Greece, which uses the ISO 639-1 language code EL for the Greek language,
+ // instead of its ISO 3166-1 alpha-2 country code GR)"
+
+ return $countryCode === 'GR' ? 'EL' : $countryCode;
+ }
+}

etc/di.xml

@@ -16,6 +16,11 @@
  <plugin name="Dutchento_Vatfallback_Plugin_Magento_Customer_Model_Vat" sortOrder="10"
  type="Dutchento\Vatfallback\Plugin\Magento\Customer\Model\Vat"/>
  </type>
+ <type name="Dutchento\Vatfallback\Service\Validate\ValidationServiceInterface">
+ <plugin name="Dutchento_Vatfallback_Plugin_Service_Validate_ValidationServiceInterface" sortOrder="10"
+ type="Dutchento\Vatfallback\Plugin\Service\Validate\ValidationService"/>
+ </type>
+
  <type name="Magento\Framework\Console\CommandList">
  <arguments>
  <argument name="commands" xsi:type="array">