Added norwegian validation, updated README.md

README.md

@@ -2,7 +2,9 @@
 ## A formal VAT number validator
 
 It's not a full validation tool, it just checks that the VAT number is formally valid: eg. 11 chars, digits only, etc.
-It's built using these rules: https://www.gov.uk/guidance/vat-eu-country-codes-vat-numbers-and-vat-in-other-languages
+It's built using these rules:
+ * https://www.gov.uk/guidance/vat-eu-country-codes-vat-numbers-and-vat-in-other-languages
+ * https://en.wikipedia.org/wiki/VAT_identification_number
 
 It requires PHP >= 7.0.
 
@@ -17,7 +19,10 @@ Usage
 Just load the Validate class and execute a check, passing the country code and VAT code as parameters:
 
 ```php
-$validator = new Tox82\Validate\ValidateVat;
+use Tox82\VatNumber\Validate;
+
+...
+
 echo Validate::check('FR', '12345678901'); // true
 echo Validate::check('HU', '12345678'); // true
 echo Validate::check('PT', '123456789'); // true

src/VatNumber/Validate.php

@@ -15,6 +15,7 @@
  * @author   Emanuele "ToX" Toscano <[email protected]>
  * @license  GNU General Public License; <https://www.gnu.org/licenses/gpl-3.0.en.html>
  * @link     https://www.gov.uk/guidance/vat-eu-country-codes-vat-numbers-and-vat-in-other-languages
+ * @link     https://en.wikipedia.org/wiki/VAT_identification_number
  */
 class Validate
 {
@@ -96,6 +97,9 @@ public static function check(string $country, string $code): bool
         case "NL":
             // 12 characters. The tenth character is always B
             return self::checkLength($code, 12, 12) && self::checkNetherlands($code);
+        case "NO":
+            // 9 characters. 12 when it contains the letters MVA
+            return self::checkLength($code, 9, 12) && self::checkNorway($code);
         case "PL":
             // 10 characters.
             return self::checkLength($code, 10, 10) && self::numbersOnly($code);
@@ -293,6 +297,27 @@ public static function checkNetherlands(string $code): bool
         return true;
     }
 
+    /**
+     * Additional validations for Norway
+     *
+     * @param string $code Regional VAT code
+     *
+     * @return bool
+     */
+    public static function checkNorway(string $code): bool
+    {
+        $return = false;
+
+        // the string must be 9 digits, or 9 digits followed by MVA
+        if (preg_match('/^[0-9]{9}$/i', $code)) {
+            $return = true;
+        } elseif (preg_match('/^[0-9]{9}[MVA]{3}$/i', $code)) {
+            $return = true;
+        }
+
+        return $return;
+    }
+
     /**
      * Additional validations for Spain
      *

tests/Validate/Test.php

@@ -55,6 +55,8 @@ public function testCheckValids()
         $this->assertTrue(Validate::check('LU', '12345678'));
         $this->assertTrue(Validate::check('MT', '12345678'));
         $this->assertTrue(Validate::check('NL', '123456789B01'));
+        $this->assertTrue(Validate::check('NO', '123456789'));
+        $this->assertTrue(Validate::check('NO', '123456789MVA'));
         $this->assertTrue(Validate::check('PL', '1234567890'));
         $this->assertTrue(Validate::check('PT', '123456789'));
         $this->assertTrue(Validate::check('RO', '12'));
@@ -104,5 +106,6 @@ public function testCheckWithInvalidCharacters()
     {
         $this->assertFalse(Validate::check('AT', 'A12345678'));
         $this->assertFalse(Validate::check('IT', 'IT00154189997'));
+        $this->assertFalse(Validate::check('NO', '123456789MV'));
     }
 }