init

2024-11-05 12:10:06 +08:00
commit 6b687feee2
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+<?php
+
+/*
+ * Copyright (c) Alexandre Gomes Gaigalas <alganet@gmail.com>
+ * SPDX-License-Identifier: MIT
+ */
+
+declare(strict_types=1);
+
+namespace Respect\Validation\Rules;
+
+use function array_keys;
+use function array_map;
+use function array_pop;
+use function array_sum;
+use function intval;
+use function is_numeric;
+use function is_string;
+use function str_split;
+use function strlen;
+
+/**
+ * Validates Portugal's fiscal identification number (NIF)
+ *
+ *
+ * @see https://pt.wikipedia.org/wiki/N%C3%BAmero_de_identifica%C3%A7%C3%A3o_fiscal
+ *
+ * @author Gonçalo Andrade <goncalo.andrade95@gmail.com>
+ */
+final class PortugueseNif extends AbstractRule
+{
+    /**
+     * {@inheritDoc}
+     */
+    public function validate($input): bool
+    {
+        // Validate format and length
+        if (!is_string($input)) {
+            return false;
+        }
+
+        if (!is_numeric($input)) {
+            return false;
+        }
+
+        if (strlen($input) != 9) {
+            return false;
+        }
+
+        $digits = array_map(static fn (string $digit) => intval($digit), str_split($input));
+
+        // Validate first and second digits
+        switch ($digits[0]) {
+            case 4:
+                switch ($digits[1]) {
+                    case 5:
+                        break;
+                    default:
+                        return false;
+                }
+                break;
+            case 7:
+                switch ($digits[1]) {
+                    case 0:
+                    case 1:
+                    case 2:
+                    case 4:
+                    case 5:
+                    case 7:
+                    case 8:
+                    case 9:
+                        break;
+                    default:
+                        return false;
+                }
+                break;
+            case 9:
+                switch ($digits[1]) {
+                    case 0:
+                    case 1:
+                    case 8:
+                    case 9:
+                        break;
+                    default:
+                        return false;
+                }
+                break;
+            default:
+                break;
+        }
+
+        // Validate check digit
+        $checkDigit = array_pop($digits);
+        $digitKeys = array_keys($digits);
+        $sumTerms = array_map(static fn (int $digit, int $position) => $digit * (9 - $position), $digits, $digitKeys);
+        $sum = array_sum($sumTerms);
+        $modulus = $sum % 11;
+
+        if ($modulus == 0 || $modulus == 1) {
+            return $checkDigit == 0;
+        }
+
+        return $checkDigit == 11 - $modulus;
+    }
+}