/**
* Public function that creates a single instance
*/
public static function getInstance()
{
if (!isset(self::$_instance)) {
self::$_instance = new self();
}
return self::$_instance;
}
/**
* Check if specified activity is alive.
*
* @return boolean
*/
public function isAlive()
{
global $db;
$manager = ActivityManager::getInstance();
$log_manager = ActivityLogManager::getInstance();
// collect data
$result = false;
$activity_name = isset($_REQUEST['activity']) ? fix_chars($_REQUEST['activity']) : null;
$function_name = isset($_REQUEST['function']) ? fix_chars($_REQUEST['function']) : null;
// check license if module is loaded
if (class_exists('license')) {
$license = license::getInstance();
$license_number = fix_chars($_REQUEST['license']);
if (!$license->isLicenseValid($this->name, $license_number)) {
return $result;
}
}
// get activity
$activity = $manager->getSingleItem($manager->getFieldNames(), array('activity' => $activity_name, 'function' => $function_name));
// prepare log conditions
$conditions = array();
if (is_object($activity)) {
$conditions['activity'] = $activity->id;
$conditions['timestamp'] = array('operator' => '>=', 'value' => $db->format_timestamp(time() - $activity->timeout));
if (!$activity->ignore_address) {
$conditions['address'] = $_SERVER['REMOTE_ADDR'];
}
}
if ($_SESSION['logged']) {
$conditions['user'] = $_SESSION['uid'];
}
// get logs from database
$logs = $log_manager->getItems(array('id'), $conditions);
$result = count($logs) > 0;
// show result
if (_AJAX_REQUEST) {
print json_encode($result);
}
return $result;
}
