pos/is4c-nf/ajax/AjaxPollScale.php
<?php
/*******************************************************************************
Copyright 2015 Whole Foods Co-op
This file is part of IT CORE.
IT CORE is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
IT CORE is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
in the file license.txt along with IT CORE; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*********************************************************************************/
namespace COREPOS\pos\ajax;
use COREPOS\pos\lib\AjaxCallback;
use COREPOS\pos\lib\DriverWrappers\ScaleDriverWrapper;
include_once(dirname(__FILE__).'/../lib/AutoLoader.php');
class AjaxPollScale extends AjaxCallback
{
protected $encoding = 'plain';
public function ajax()
{
$sdObj = ScaleDriverWrapper::factory($this->session->get('scaleDriver'));
if (is_object($sdObj)) {
ob_start();
$sdObj->readFromScale();
return ob_get_clean();
}
return "{}"; // no driver => empty json
}
}
AjaxPollScale::run();