Calculate distance between PLZs if given

src/Service/DistanceCalculator.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace App\Service;
+
+use Location\Coordinate;
+use Location\Distance\Vincenty;
+
+class DistanceCalculator
+{
+    public function calculateDistance(Coordinate $coordinate1, Coordinate $coordinate2)
+    {
+        $calculator = new Vincenty();
+
+        $distance = $calculator->getDistance($coordinate1, $coordinate2);
+
+        $distance = round($distance / 1000);
+
+        return $distance;
+    }
+}