106 lines
2.6 KiB
PHP
106 lines
2.6 KiB
PHP
<?php
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/*
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* Copyright (c) Alexandre Gomes Gaigalas <alganet@gmail.com>
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* SPDX-License-Identifier: MIT
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*/
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declare(strict_types=1);
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namespace Respect\Validation\Rules;
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use function array_keys;
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use function array_map;
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use function array_pop;
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use function array_sum;
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use function intval;
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use function is_numeric;
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use function is_string;
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use function str_split;
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use function strlen;
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/**
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* Validates Portugal's fiscal identification number (NIF)
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*
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*
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* @see https://pt.wikipedia.org/wiki/N%C3%BAmero_de_identifica%C3%A7%C3%A3o_fiscal
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*
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* @author Gonçalo Andrade <goncalo.andrade95@gmail.com>
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*/
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final class PortugueseNif extends AbstractRule
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{
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/**
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* {@inheritDoc}
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*/
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public function validate($input): bool
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{
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// Validate format and length
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if (!is_string($input)) {
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return false;
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}
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if (!is_numeric($input)) {
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return false;
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}
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if (strlen($input) != 9) {
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return false;
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}
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$digits = array_map(static fn (string $digit) => intval($digit), str_split($input));
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// Validate first and second digits
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switch ($digits[0]) {
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case 4:
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switch ($digits[1]) {
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case 5:
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break;
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default:
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return false;
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}
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break;
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case 7:
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switch ($digits[1]) {
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case 0:
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case 1:
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case 2:
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case 4:
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case 5:
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case 7:
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case 8:
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case 9:
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break;
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default:
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return false;
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}
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break;
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case 9:
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switch ($digits[1]) {
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case 0:
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case 1:
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case 8:
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case 9:
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break;
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default:
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return false;
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}
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break;
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default:
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break;
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}
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// Validate check digit
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$checkDigit = array_pop($digits);
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$digitKeys = array_keys($digits);
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$sumTerms = array_map(static fn (int $digit, int $position) => $digit * (9 - $position), $digits, $digitKeys);
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$sum = array_sum($sumTerms);
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$modulus = $sum % 11;
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if ($modulus == 0 || $modulus == 1) {
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return $checkDigit == 0;
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}
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return $checkDigit == 11 - $modulus;
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}
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}
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