zend-blog-3-backend

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<?php
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/**
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 * Created by PhpStorm.
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 * User: morontt
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 * Date: 26.08.17
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 * Time: 17:28
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 */
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namespace App\Service;
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use App\Entity\TrackingAgent;
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use Doctrine\ORM\EntityManager;
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use Doctrine\ORM\EntityManagerInterface;
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class Tracking
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{
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    /**
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     * @var EntityManager
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     */
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    protected $em;
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    /**
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     * @param EntityManagerInterface $em
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     */
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    public function __construct(EntityManagerInterface $em)
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    {
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        $this->em = $em;
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    }
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    /**
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     * @param string $agentName
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     *
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     * @return TrackingAgent
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     */
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    public function getTrackingAgent(string $agentName): TrackingAgent
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    {
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        $hash = md5($agentName);
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        $agent = $this->em->getRepository(TrackingAgent::class)->findOneByHash($hash);
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        if (!$agent) {
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            $agent = new TrackingAgent();
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            $agent->setUserAgent($agentName);
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            $this->em->persist($agent);
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            $this->em->flush($agent);
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        }
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        return $agent;
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    }
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}
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