public function genHash($id = null)
{
if (is_null($id)) {
$recipients = Campaign::getRecipients($this->getGroup());
foreach ($recipients as $recipient) {
do {
$hash = sha1(uniqid($this->getId(), true));
$hash = substr($hash, 0, 20);
$sql = 'INSERT INTO campaign_hash SET user_id="' . e($recipient->getId()) . '", campaign_id="' . e($this->getId()) . '", hash="' . e($hash) . '"';
$result = Database::singleton()->query($sql);
} while (!$result);
}
} else {
$recipient = new CampaignUser($id);
do {
$hash = sha1(uniqid($this->getId(), true));
$hash = substr($hash, 0, 20);
$sql = 'INSERT INTO campaign_hash SET user_id="' . e($recipient->getId()) . '", campaign_id="' . e($this->getId()) . '", hash="' . e($hash) . '"';
$result = Database::singleton()->query($sql);
} while (!$result);
}
}
