wip: booking process, refactor participant room assignment logic

src/BusProNet/XmlParser/PickupsParser.php

@@ -26,7 +26,7 @@ class PickupsParser extends AbstractParser
             $pickup->time = $this->stringToDateTime($pickupDate.' '.$pickupTime);
             $pickup->price = $price;
             $mapping = $this->stringToArray($node->attr('zuordnung'));
-            $pickup->mapping = array_map('intval', $mapping);
+            $pickup->mapping = array_map(function ($index) { return (int) $index - 1; }, $mapping);
 
             $pickups[$pickupId] = $pickup;
         });