oxserverchecker.php

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<?php

class oxServerChecker
{

    const NODE_VALIDITY_TIME = 86400;

    private $_iCurrentTime = 0;

    public function __construct()
    {
        $this->_iCurrentTime = oxRegistry::get("oxUtilsDate")->getTime();
    }

    public function check(oxApplicationServer $oServer)
    {
        $blResult = false;

        if ($this->_isValid($oServer) && $this->_isServerTimeValid($oServer->getTimestamp())) {
            $blResult = true;
        }

        return $blResult;
    }

    private function _isValid($oServer)
    {
        return ($oServer->getTimestamp() - $this->_getCurrentTime() + self::NODE_VALIDITY_TIME) > 0;
    }

    private function _isServerTimeValid($iServerTimeInPast)
    {
        return ($this->_getCurrentTime() - $iServerTimeInPast) >= 0;
    }

    private function _getCurrentTime()
    {
        return $this->_iCurrentTime;
    }
}