Calculate distance between PLZs if given

src/Service/DistanceCalculator.php

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+<?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;
+    }
+}

src/Service/PlzToCoordinate.php

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+<?php
+
+namespace App\Service;
+
+use Location\Coordinate;
+
+class PlzToCoordinate
+{
+    public function getCoordinates(int $plz)
+    {
+        $content = file_get_contents("https://swisspost.opendatasoft.com/api/records/1.0/search/?dataset=plz_verzeichnis_v2&q=postleitzahl%3D" . $plz);
+        $result  = json_decode($content);
+
+        if (isset($result->records[0]->fields->geo_point_2d[0]) && isset($result->records[0]->fields->geo_point_2d[1])) {
+            $coordinate = new Coordinate($result->records[0]->fields->geo_point_2d[0], $result->records[0]->fields->geo_point_2d[1]);
+        }
+
+        return $coordinate;
+    }
+}