MineSeeker/src/Mine/SeekerBundle/Topic/AcmeTopic.php

<?php

namespace Mine\SeekerBundle\Topic;

use Doctrine\ORM\EntityManager;
use Gos\Bundle\WebSocketBundle\Client\ClientManipulatorInterface;
use Gos\Bundle\WebSocketBundle\Topic\TopicInterface;
use Gos\Bundle\WebSocketBundle\Router\WampRequest;
use Ratchet\ConnectionInterface;
use Ratchet\Wamp\Topic;

class AcmeTopic implements TopicInterface
{
    /** @var ClientManipulatorInterface */
    protected $clientManipulator;

    /** @var EntityManager */
    protected $entityManager;

    /**
     * AcmeTopic constructor.
     *
     * @param $clientManipulator ClientManipulatorInterface
     * @param EntityManager $entityManager
     */
    public function __construct(ClientManipulatorInterface $clientManipulator, EntityManager $entityManager)
    {
        $this->clientManipulator = $clientManipulator;
        $this->entityManager = $entityManager;
    }

    /**
     * This will receive any Subscription requests for this topic.
     *
     * @param ConnectionInterface $connection
     * @param Topic $topic
     * @param WampRequest $request
     * @return void
     */
    public function onSubscribe(ConnectionInterface $connection, Topic $topic, WampRequest $request)
    {
        /** this will broadcast the message to ALL subscribers of this topic. */
        $user = $this->clientManipulator->getClient($connection);
        $userName = is_string($user) ? $user : $user->getUsername();

        /** if more user wants to connect than 2 to one channel */
        if ($topic->count() > 2) {
            $topic->remove($connection);
        } else {
            $topic->broadcast([
                'userTopicId' => $connection->resourceId,
                'channel' => $topic->getId(),
                'user' => $userName,
                'userCnt' => $topic->count()
            ]);
        }
    }

    /**
     * This will receive any UnSubscription requests for this topic.
     *
     * @param ConnectionInterface $connection
     * @param Topic $topic
     * @param WampRequest $request
     * @return void
     */
    public function onUnSubscribe(ConnectionInterface $connection, Topic $topic, WampRequest $request)
    {
        /** this will broadcast the message to ALL subscribers of this topic. */
        $topic->broadcast(['msg' => $connection->resourceId . " has left " . $topic->getId()]);
    }

    /**
     * This will receive any Publish requests for this topic.
     *
     * @param ConnectionInterface $connection
     * @param Topic $topic
     * @param WampRequest $request
     * @param $event
     * @param array $exclude
     * @param array $eligible
     * @return mixed|void
     * @internal param Topic $Topic
     * @internal param array $eligibles
     */
    public function onPublish(ConnectionInterface $connection, Topic $topic, WampRequest $request, $event, array $exclude, array $eligible)
    {
        $user = $this->clientManipulator->getClient($connection);
        $userName = is_string($user) ? $user : $user->getUsername();

        $topic->broadcast([
            'userTopicId' => $connection->resourceId,
            'channel' => $topic->getId(),
            'user' => $userName,
            'userCnt' => $topic->count(),
            'data' => $event
        ]);
    }

    /**
     * Like RPC is will use to prefix the channel
     * @return string
     */
    public function getName()
    {
        return 'acme.topic';
    }
}