/**
* Constructs an instance of this class.
*
* @param Connection $connection
* @param IdentifierGenerator $generator
*/
public function __construct(Connection $connection, IdentifierGenerator $generator)
{
$this->connection = $connection;
if ($this->connection->getClientID() === '') {
$this->connection = $this->connection->withClientID($generator->generateClientID());
}
}
/**
* Connects to a broker.
*
* @param string $host
* @param int $port
* @param Connection $connection
* @param int $timeout
*
* @return ExtendedPromiseInterface
*/
public function connect($host, $port = 1883, Connection $connection = null, $timeout = 5)
{
if ($this->isConnected || $this->isConnecting) {
return new RejectedPromise(new \LogicException('The client is already connected.'));
}
$this->isConnecting = true;
$this->isConnected = false;
$this->host = $host;
$this->port = $port;
if ($connection === null) {
$connection = new DefaultConnection();
}
if ($connection->getClientID() === '') {
$connection = $connection->withClientID($this->identifierGenerator->generateClientID());
}
$deferred = new Deferred();
$this->establishConnection($this->host, $this->port, $timeout)->then(function (Stream $stream) use($connection, $deferred, $timeout) {
$this->stream = $stream;
$this->emit('open', [$connection, $this]);
$this->registerClient($connection, $timeout)->then(function (Connection $connection) use($deferred) {
$this->isConnecting = false;
$this->isConnected = true;
$this->connection = $connection;
$this->emit('connect', [$connection, $this]);
$deferred->resolve($this->connection);
})->otherwise(function (\Exception $e) use($deferred, $connection) {
$this->isConnecting = false;
$this->emitError($e);
$deferred->reject($e);
$this->stream->close();
$this->emit('close', [$connection, $this]);
});
})->otherwise(function (\Exception $e) use($deferred) {
$this->isConnecting = false;
$this->emitError($e);
$deferred->reject($e);
});
return $deferred->promise();
}