<?php

require_once(__DIR__ . '/RpcCommon.php');

if (!isset($g_zmqcontext)) {
	$g_zmqcontext = new ZMQContext();
}

class SubscribeSocket extends RpcCommon {
	private $__socket;

	function __construct(&$test, $uri, $socket_to = 10000) {
		parent::__construct($test);
		global $g_zmqcontext;

		$this->__socket = $g_zmqcontext->getSocket(ZMQ::SOCKET_SUB);
		$this->__socket->setSockOpt(ZMQ::SOCKOPT_SUBSCRIBE, "");
		$this->__socket->connect($uri);
	}

	function recv($deviceUID = "", $timeoutMs = -1) {
		$start = microtime(true) * 1000;
		$end   = $start + $timeoutMs;

		while (true) {
			while (true) {
				$this->__socket->setSockOpt(ZMQ::SOCKOPT_RCVTIMEO, $timeoutMs);
				try {
					$r = $this->__socket->recv();
				} catch (ZMQSocketException $e) {
					return null;
				}

				if (!$this->__socket->getSockOpt(ZMQ::SOCKOPT_RCVMORE))
					break;
			}

			$msg = json_decode($r, true);

			if ($deviceUID == "") {
				break;
			} else {
				if ($msg['device:uid'] == $deviceUID) {
					break;
				}
			}

			if ((microtime(true) * 1000) > $end && $timeoutMs > 0)
				return null;
		}

		return $msg;
	}
}