wikimedia/mediawiki-extensions-DonationInterface

<?php

use SmashPig\Core\ValidationError;

class PostalCodeValidation implements ValidationHelper {

    /**
     * Checks that the postal code field data is valid
     *
     * @param GatewayType $adapter
     * @param array $normalized Donation data in normalized form.
     * @param ErrorState &$errors Reference to error array
     */
    public function validate( GatewayType $adapter, $normalized, &$errors ) {
        global $wgDonationInterfaceDlocalPostalCodeLengthRequirements;
        $country = $normalized['country'] ?? '';
        $rules = [];
        $postal_code = $normalized['postal_code'] ?? '';

        if ( trim( $country ) != '' ) {
            $country = strtoupper( $country );
            if ( isset( $wgDonationInterfaceDlocalPostalCodeLengthRequirements[ $country ] ) ) {
                $rules = $wgDonationInterfaceDlocalPostalCodeLengthRequirements[ $country ];
            }
        }

        if ( trim( $postal_code ) != '' && count( $rules ) != 0 ) {
            $len = strlen( $postal_code );

            if ( $len < $rules['min'] || $len > $rules['max'] ) {
                $errors->addError( new ValidationError(
                    'postal_code',
                    $rules['message']
                ) );
            }
        }
    }
}