public function getMostRecentVisitorId($idSite, $segment = false)
{
Piwik::checkUserHasViewAccess($idSite);
// for faster performance search for a visitor within the last 7 days first
$minTimestamp = Date::now()->subDay(7)->getTimestamp();
$dataTable = $this->loadLastVisitorDetailsFromDatabase($idSite, $period = false, $date = false, $segment, $offset = 0, $limit = 1, $minTimestamp);
if (0 >= $dataTable->getRowsCount()) {
$minTimestamp = Date::now()->subYear(1)->getTimestamp();
// no visitor found in last 7 days, look further back for up to 1 year. This query will be slower
$dataTable = $this->loadLastVisitorDetailsFromDatabase($idSite, $period = false, $date = false, $segment, $offset = 0, $limit = 1, $minTimestamp);
}
if (0 >= $dataTable->getRowsCount()) {
// no visitor found in last year, look over all logs. This query might be quite slow
$dataTable = $this->loadLastVisitorDetailsFromDatabase($idSite, $period = false, $date = false, $segment, $offset = 0, $limit = 1);
}
if (0 >= $dataTable->getRowsCount()) {
return false;
}
$visitorFactory = new VisitorFactory();
$visitDetails = $dataTable->getFirstRow()->getColumns();
$visitor = $visitorFactory->create($visitDetails);
return $visitor->getVisitorId();
}
