the_cat_api_service.php

<?php

namespace AppBundle\Integration\TheCatApi;

use AppBundle\Integration\TheCatApi\Value\TheCatApiValue;
use eZ\Publish\Core\MVC\ConfigResolverInterface;
use Http\Client\HttpClient;
use Http\Message\MessageFactory;
use Psr\Http\Message\RequestInterface;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;

final class Service
{
    /**
     * @var \eZ\Publish\Core\MVC\ConfigResolverInterface
     */
    private $configResolver;

    /**
     * @var \Http\Client\HttpClient
     */
    private $httpClient;

    /**
     * @var \Http\Message\MessageFactory
     */
    private $messageFactory;

    public function __construct(
        ConfigResolverInterface $configResolver,
        HttpClient $httpClient,
        MessageFactory $messageFactory
    ) {
        $this->configResolver = $configResolver;
        $this->httpClient = $httpClient;
        $this->messageFactory = $messageFactory;
    }

    public function getCategories(): array
    {
        $request = $this->messageFactory
            ->createRequest(
                Request::METHOD_GET,
                $this->configResolver->getParameter('cats_api.url_categories', 'app'),
                [
                    'x-api-key' => $this->configResolver->getParameter('cats_api.token', 'app'),
                ]
            );

        return $this->sendRequest($request);
    }

    public function getBreeds(): array
    {
        $request = $this->messageFactory
            ->createRequest(
                Request::METHOD_GET,
                $this->configResolver->getParameter('cats_api.url_breeds', 'app'),
                [
                    'x-api-key' => $this->configResolver->getParameter('cats_api.token', 'app'),
                ]
            );

        return $this->sendRequest($request);
    }

    private function sendRequest(RequestInterface $request): array
    {
        try {
            $response = $this->httpClient->sendRequest($request);
        } catch (\Exception $exception) {
            return [];
        }

        if ($response->getStatusCode() !== Response::HTTP_OK) {
            return [];
        }

        $data = json_decode(
            (string)$response->getBody(),
            true
        );

        $objects = [];
        foreach ($data as $datum) {
            $objects[] = new TheCatApiValue($datum['id'], $datum['name']);
        }

        return $objects;
    }
}