added vat validation

Validation/Finance/EUVat.php

@@ -0,0 +1,88 @@
+<?php
+/**
+ * Karaka
+ *
+ * PHP Version 8.1
+ *
+ * @package   phpOMS\Validation\Finance
+ * @copyright Dennis Eichhorn
+ * @license   OMS License 2.0
+ * @version   1.0.0
+ * @link      https://jingga.app
+ */
+declare(strict_types=1);
+
+namespace phpOMS\Validation\Finance;
+
+use phpOMS\Validation\ValidatorAbstract;
+
+/**
+ * Very basic but **incomplete** VAT validation.
+ *
+ * For a proper VAT validation use existing APIs.
+ *
+ * @package phpOMS\Validation\Finance
+ * @license OMS License 2.0
+ * @link    https://jingga.app
+ * @since   1.0.0
+ */
+final class EUVat extends ValidatorAbstract
+{
+    public const PATTERNS = [
+        'EUROPE' => '/^(EU)([0-9][9])$/', // This is a special EU VAT.
+        'AUT' => '/^(AT)U[0-9]{8}$/',
+        'BEL' => '/^(BE)[0-9]{10}$/',
+        'BGR' => '/^(BG)[0-9]{9,10}$/',
+        'CYP' => '/^(CY)[0-9]{8}[A-Z]$/',
+        'CZE' => '/^(CZ)([0-9]{8,10}|[0-9]{6}-[0-9]{3,4})$/',
+        'DEU' => '/^(DE)[0-9]{9}$/',
+        'DNK' => '/^(DK)[0-9]{8}$/',
+        'EST' => '/^(EE)[0-9]{9}$/',
+        'ESP' => '/^(ES)([A-Z][0-9]{8}|[A-Z][0-9]{7}[A-Z])$/',
+        'FIN' => '/^(FI)([0-9]{8})$/',
+        'FRA' => '/^(FR)[0-9]{2}[0-9]{9}$/',
+        'GBR' => '/^(GB)([0-9]{9}|[0-9]{12}|(GD)[0-4][0-9]{2}|(HA)5[0-9]{2})$/',
+        'GRC' => '/^(EL)([0-9]{7,9})$/',
+        'HRV' => '/^(HR)([0-9]{11})$/',
+        'HUN' => '/^(HU)([0-9]{8})$/',
+        'IRL' => '/^(IE)([0-9]{7}[A-Z]{1,2}|[0-9][A-Z][0-9]{5}[A-Z])$/',
+        'ITA' => '/^(IT)([0-9]{11})$/',
+        'LTU' => '/^(LT)([0-9]{9}|[0-9]{12})$/',
+        'LUX' => '/^(LU)([0-9]{8})$/',
+        'LVA' => '/^(LV)([0-9]{11})$/',
+        'MLT' => '/^(MT)([0-9]{8})$/',
+        'NLD' => '/^(NL)([0-9]{9}B[0-9]{2})$/',
+        'POL' => '/^(PL)([0-9]{10}|[0-9]{3}-[0-9]{2}-[0-9]{2}-[0-9]{3})$/',
+        'PRT' => '/^(PT)([0-9]{9})$/',
+        'ROU' => '/^(RO)([0-9]{2,10})$/',
+        'SWE' => '/^(SE)([0-9]{10}[0-9]{2})$/i',
+        'SVN' => '/^(SI)([0-9]{8})$/',
+        'SVK' => '/^(SK)([0-9][10])$/',
+        'HRV' => '/^(HR)([0-9][11])$/',
+    ];
+
+    /**
+     * {@inheritdoc}
+     */
+    public static function isValid(mixed $value, array $constraints = null) : bool
+    {
+        if (!\is_string($value)) {
+            return false;
+        }
+
+        $value = \str_replace(' ', '', \strtoupper($value));
+
+        foreach (self::PATTERNS as $pattern) {
+            if ((bool) \preg_match($pattern, $value)) {
+                // VAT potentially valid
+                return true;
+            } elseif (\stripos($pattern, \substr($value, 0, 2)) !== false) {
+                // Regex found but didn't match, therefore VAT is considered potentially invalid
+                return false;
+            }
+        }
+
+        // Couldn't find possible regex, therefore the VAT is considered potentially valid
+        return true;
+    }
+}