/**
* Get lock lifetime
*
* @return int|mixed
*/
private function getLifeTime()
{
if (is_null($this->_lifeTime)) {
$lifeTime = null;
// Detect bots by user agent
$botLifetime = $this->config->getBotLifetime() ?: self::DEFAULT_BOT_LIFETIME;
if ($botLifetime) {
$userAgent = empty($_SERVER['HTTP_USER_AGENT']) ? false : $_SERVER['HTTP_USER_AGENT'];
$isBot = !$userAgent || preg_match(self::BOT_REGEX, $userAgent);
if ($isBot) {
$this->_log(sprintf("Bot detected for user agent: %s", $userAgent));
if ($this->_sessionWrites <= 1 && ($botFirstLifetime = $this->config->getBotFirstLifetime() ?: self::DEFAULT_BOT_FIRST_LIFETIME)) {
$lifeTime = $botFirstLifetime * (1 + $this->_sessionWrites);
} else {
$lifeTime = $botLifetime;
}
}
}
// Use different lifetime for first write
if ($lifeTime === null && $this->_sessionWrites <= 1) {
$firstLifetime = $this->config->getFirstLifetime() ?: self::DEFAULT_FIRST_LIFETIME;
if ($firstLifetime) {
$lifeTime = $firstLifetime * (1 + $this->_sessionWrites);
}
}
// Neither bot nor first write
if ($lifeTime === null) {
$this->_lifeTime = self::DEFAULT_LIFETIME;
}
if ($this->_lifeTime < $this->_minLifetime) {
$this->_lifeTime = $this->_minLifetime;
}
if ($this->_lifeTime > $this->_maxLifetime) {
$this->_lifeTime = $this->_maxLifetime;
}
}
return $this->_lifeTime;
}
