/**
* Public function that creates a single instance
*/
public static function getInstance()
{
if (!isset(self::$_instance)) {
self::$_instance = new self();
}
return self::$_instance;
}
/**
* Check if trial is available for current user.
*
* @return boolean
*/
public function trialAvailable()
{
$result = true;
// return cached version
if (!is_null($this->cached_trial_available)) {
return $this->cached_trial_available;
}
// prepare variables for processing
$address = $_SERVER['REMOTE_ADDR'];
$manager = SapphireWavesTrialManager::getInstance();
// remove old entries
$manager->deleteData(array('timestamp' => array('operator' => '<', 'value' => time() - 7 * 24 * 60 * 60)));
// check if we have existing records
$record = $manager->getSingleItem($manager->getFieldNames(), array('address' => $address));
if (is_object($record)) {
$result = $record->timestamp >= time() - 7 * 24 * 60 * 60 && $record->times_used <= 2;
}
// cache result for further use in current execution
$this->cached_trial_available = $result;
return $result;
}