Calculate distance between PLZs if given

src/Controller/OfferController.php

@@ -8,6 +8,8 @@ use App\Form\OfferingFormType;
 use App\Repository\OfferingRepository;
 use App\Repository\WishRepository;
 
+use App\Service\PlzToCoordinate;
+use App\Service\DistanceCalculator;
 
 use Doctrine\ORM\EntityManagerInterface;
 use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
@@ -73,12 +75,27 @@ class OfferController extends AbstractController
     }
 
     #[Route('/offer/{id}', name: 'show_offer')]
-    public function show_offer(Offering $offer, WishRepository $wishRepository): Response
+    public function show_offer(Offering $offer, WishRepository $wishRepository, PlzToCoordinate $plzconverter, DistanceCalculator $distanceCalculator): Response
     {
+        $distance = 0;
+        $user = $this->getUser();
+        $offerPlz = $offer->getZipCode();
+        
+        if (isset($user))
+        {
+            $userPlz = $user->getZipCode();
+        }
+
+        if (isset($userPlz)) 
+        {
+            $distance = $distanceCalculator->calculateDistance($plzconverter->getCoordinates($offerPlz), $plzconverter->getCoordinates($userPlz));
+        }
+
         return $this->render('app/offer.html.twig', [
-            'user' => $this->getUser(),
+            'user' => $user,
             'offer' => $offer,
             'wishes' => $wishRepository->findByUser($offer->getByUser()),
+            'distance' => $distance,
         ]);
     }
 

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;
+    }
+}

src/Service/PlzToCoordinate.php

@@ -0,0 +1,20 @@
+<?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;
+    }
+}