feat: show documents link only when applicable

src/BusProNet/XmlParser/BookingsParser.php

@@ -31,10 +31,12 @@ class BookingsParser extends AbstractParser
             $booking->travelId = $this->getIntOrNullValue($node->filterXPath('//idreise'));
             $booking->travelDate = $this
                 ->stringToDate($this->getStringOrNullValue($node->filterXPath('//reisedatum')));
-            $booking->document = $this
+            $booking->hasDocuments = $this
                 ->stringToBool($this->getStringOrNullValue($node->filterXPath('//reisedokument')));
             $booking->payment = $this
                 ->stringToFloat($this->getStringOrNullValue($node->filterXPath('//zahlung')));
+            $booking->hasDocuments = $this
+                ->stringToBool($this->getStringOrNullValue($node->filterXPath('//reisedokument')));
 
             $bookings[] = $booking;
         });