Add transformer function for checkout links

src/ApiResource/Gateway/CheckoutApiResource.php

@@ -8,6 +8,7 @@ use App\ApiResource\Accounting\AccountingApiResource;
 use App\Entity\Gateway\Checkout;
 use App\Gateway\CheckoutStatus;
 use App\Gateway\Link;
+use App\Gateway\LinkType;
 use App\Gateway\Tracking;
 use App\Mapping\Transformer\GatewayNameMapTransformer;
 use App\State\ApiResourceStateProvider;
@@ -69,6 +70,7 @@ class CheckoutApiResource
      * @var Link[]
      */
     #[API\ApiProperty(writable: false)]
+    #[MapFrom(transformer: [self::class, 'parseLinks'])]
     public array $links = [];
 
     /**
@@ -80,6 +82,19 @@ class CheckoutApiResource
     #[MapFrom(transformer: [self::class, 'parseTrackings'])]
     public array $trackings = [];
 
+    public static function parseLinks(array $values)
+    {
+        return \array_map(function ($value) {
+            $link = new Link();
+            $link->href = $value['href'];
+            $link->rel = $value['rel'];
+            $link->method = $value['method'];
+            $link->type = LinkType::tryFrom($value['type']);
+
+            return $link;
+        }, $values);
+    }
+
     public static function parseTrackings(array $values)
     {
         return \array_map(function ($value) {