allow forced filename

Application/Model/AbstractClasses/pdfdocumentsGeneric.php

@@ -39,6 +39,9 @@ abstract class pdfdocumentsGeneric extends Base implements genericInterface
     /** @var Smarty  */
     public $oSmarty;
 
+    /** @var string */
+    public $filename;
+
     /**
      * pdfDocumentsGeneric constructor.
      */
@@ -126,6 +129,14 @@ abstract class pdfdocumentsGeneric extends Base implements genericInterface
         return [self::PDF_ORIENTATION_PORTRAIT, 'A4', 'de'];
     }
 
+    /**
+     * @param $filename
+     */
+    public function setFilename($filename)
+    {
+        $this->filename = $filename;
+    }
+
     /**
      * Gets proper file name
      *

Application/Model/AbstractClasses/pdfdocumentsOrder.php

@@ -66,6 +66,11 @@ abstract class pdfdocumentsOrder extends pdfdocumentsGeneric implements orderInt
      */
     public function getFilename()
     {
+        // forced filename from setFilename()
+        if ($this->filename) {
+            return $this->filename;
+        }
+
         $sTrimmedBillName = trim($this->getOrder()->getFieldData('oxbilllname'));
 
         return implode(