wikimedia/mediawiki-extensions-DonationInterface

<?php

class PayPalCountry implements UnstagingHelper {

    /** @var string[] */
    private static $nonStandardCodes = [
        'C2' => 'CN', // mutant China code for merchants outside of Chine
        'AN' => 'NL', // Netherlands Antilles is part of Netherlands since 2010
    ];

    public function unstage( GatewayType $adapter, $stagedData, &$unstagedData ) {
        if ( empty( $stagedData['country'] ) ) {
            return;
        }
        $country = $stagedData['country'];

        if ( array_key_exists( $country, self::$nonStandardCodes ) ) {
            $country = self::$nonStandardCodes[$country];
        }
        if ( CountryValidation::isValidIsoCode( $country ) ) {
            $unstagedData['country'] = $country;
        }
    }
}