RajaOngkir di laravel tanpa package/library

buat file di App/Services/Rajaongkir/Rajaongkir.php

<?php

namespace App\Services\Rajaongkir;

use Illuminate\Support\Facades\Http;

class RajaongkirService
{

    public const BASE_URL = [
        'starter' => 'https://api.rajaongkir.com/starter',
        'basic' => 'https://api.rajaongkir.com/basic',
        'pro' => 'https://pro.rajaongkir.com/api',
    ];

    protected string $url;

    protected array $config = [];

    public function __construct()
    {
        $this->config = config('rajaongkir');
        $this->url = self::BASE_URL[$this->config['package']];
        return $this;
    }

    protected function apiCall(string $urlPath, string $field = "", string $method = 'GET')
    {
        try {
            $curl = curl_init();
            curl_setopt_array($curl, array(
                CURLOPT_URL => $this->url . $urlPath,
                CURLOPT_RETURNTRANSFER => true,
                CURLOPT_ENCODING => "",
                CURLOPT_MAXREDIRS => 10,
                CURLOPT_TIMEOUT => 30,
                CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
                CURLOPT_CUSTOMREQUEST => $method,
                CURLOPT_POSTFIELDS => $field,
                CURLOPT_HTTPHEADER => array(
                    "key: " . $this->config['api_key']
                ),
            ));

            $response = curl_exec($curl);
            $err = curl_error($curl);

            curl_close($curl);
            $data = json_decode($response,true);
            return $data['rajaongkir']['results'];
        } catch (\Throwable $th) {
            dd($th->getMessage());
        }
        
    }

    public function getProvince()
    {
        return $this->apiCall('/province');
    }

    public function getCity($province_id)
    {
        return $this->apiCall('/city?province=' . $province_id);
    }

    public function cost($origin,$destination,$weight,$courier)
    {  
        $field = 'origin='.$origin.'&destination='.$destination.'&weight='.$weight.'&courier=' . $courier;
        return $this->apiCall('/cost',$field,'POST');
    }
}

Cara menggunkannya contoh pada controller RajaongkirController.php

<?php

namespace App\Http\Controllers\Rajaongkir;

use App\Http\Controllers\Controller;
use App\Models\RajaOngkir\City;
use App\Services\Rajaongkir\RajaongkirService;
use Illuminate\Http\Request;

class RajaongkirController extends Controller
{
    public function __construct(protected RajaongkirService $rajaongkirService)
    {
        $this->rajaongkirService = $rajaongkirService;
    }

    public function getCity($province_id)
    {
        return $this->rajaongkirService->getCity($province_id);
    }

    public function cost(Request $request)
    {
        return $this->rajaongkirService->cost($request->origin,$request->destination,$request->weight,$request->courier);
    }
}