feat: add distance value object and ci workflows

server/src/Service/PointProximityValidator.php

@@ -4,6 +4,7 @@ declare(strict_types=1);
 
 namespace App\Service;
 
+use App\ValueObject\Distance;
 use App\ValueObject\Point;
 use App\Exception\PointTooFarException;
 use Psr\Log\LoggerInterface;
@@ -21,7 +22,7 @@ final class PointProximityValidator
 
     public function assertWithinRange(Point $userLocation, Point $signalLocation): void
     {
-        $distance = $this->distanceInKm($userLocation, $signalLocation);
+        $distance = Distance::betweenPoints($userLocation, $signalLocation)->inKilometers();
 
         $this->logger->debug('Calculated proximity between user and signal.', [
             'distance_km' => $distance,
@@ -36,17 +37,4 @@ final class PointProximityValidator
             throw new PointTooFarException($this->maximumDistanceKm);
         }
     }
-
-    private function distanceInKm(Point $a, Point $b): float
-    {
-        $lat1 = deg2rad($a->getLat());
-        $lat2 = deg2rad($b->getLat());
-        $deltaLat = deg2rad($b->getLat() - $a->getLat());
-        $deltaLng = deg2rad($b->getLng() - $a->getLng());
-
-        $haversine = sin($deltaLat / 2) ** 2 + cos($lat1) * cos($lat2) * sin($deltaLng / 2) ** 2;
-        $c = 2 * atan2(sqrt($haversine), sqrt(1 - $haversine));
-
-        return 6371 * $c;
-    }
 }