ITF14 throws InvalidCheckDigitException when checksum is invalid

picqer · Jul 17, 2024 · a139792 · a139792
1 parent 5e76e1c
commit a139792
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/src/Types/TypeITF14.php b/src/Types/TypeITF14.php
@@ -5,13 +5,15 @@
 use Picqer\Barcode\Barcode;
 use Picqer\Barcode\BarcodeBar;
 use Picqer\Barcode\Exceptions\InvalidCharacterException;
+use Picqer\Barcode\Exceptions\InvalidCheckDigitException;
 use Picqer\Barcode\Exceptions\InvalidLengthException;
 
 class TypeITF14 implements TypeInterface
 {
     /**
      * @throws InvalidLengthException
      * @throws InvalidCharacterException
+     * @throws InvalidCheckDigitException
      */
     public function getBarcodeData(string $code): Barcode
     {
@@ -35,6 +37,10 @@ public function getBarcodeData(string $code): Barcode
 
         if (strlen($code) === 13) {
             $code .= $this->getChecksum($code);
+        } elseif (substr($code, -1) !== $this->getChecksum(substr($code, 0, -1))) {
+            // If length of given barcode is same as final length, barcode is including checksum
+            // Make sure that checksum is the same as we calculated
+            throw new InvalidCheckDigitException();
         }
 
         $barcode = new Barcode($code);