add tracking

src/API/Client.php

@@ -23,7 +23,7 @@ public function get($endpoint = null, array $body = []): array
     {
         return $this->parse(function () use ($endpoint, $body) {
             return $this->client->request('GET', $endpoint, [
-                'json' => $body,
+                'query' => $body,
                 'auth' => $this->auth(),
                 'headers' => [
                     'Content-Type' => 'application/json',

src/API/Tracking.php

@@ -0,0 +1,37 @@
+<?php
+
+
+namespace Booni3\DhlExpressRest\API;
+
+
+use Booni3\DhlExpressRest\DHL;
+use Booni3\DhlExpressRest\Response\RatesResponse;
+use Booni3\DhlExpressRest\DTO\ShipmentCreator;
+use Carbon\Carbon;
+
+class Tracking extends Client
+{
+    public function single(string $trackingNumber)
+    {
+        return $this->get("shipments/$trackingNumber/tracking", [
+            'trackingView' => 'all-checkpoints',
+            'levelOfDetail' => 'all'
+        ]);
+    }
+
+    public function multi(array $trackingNumbers, ?Carbon $from = null, ?Carbon $to = null)
+    {
+        $tracking = array_map(function ($tracking) {
+            return ['shipmentTrackingNumber' => $tracking];
+        }, $trackingNumbers);
+
+        $data = array_filter([
+            'dateRangeFrom' => $from ? $from->format('Y-m-d') : null,
+            'dateRangeTo' => $to ? $to->format('Y-m-d') : null,
+            'trackingView' => 'all-checkpoints',
+            'levelOfDetail' => 'all'
+        ], fn($row) => $row);
+
+        return $this->get("tracking", $tracking + $data);
+    }
+}

src/DHL.php

@@ -4,6 +4,7 @@
 
 use Booni3\DhlExpressRest\API\Rates;
 use Booni3\DhlExpressRest\API\Shipments;
+use Booni3\DhlExpressRest\API\Tracking;
 use GuzzleHttp\Client as GuzzleClient;
 
 class DHL
@@ -45,6 +46,11 @@ public function rates()
         return new Rates($this->client(), $this->config);
     }
 
+    public function tracking()
+    {
+        return new Tracking($this->client(), $this->config);
+    }
+
     protected function client(): GuzzleClient
     {
         if($this->client){