public function __construct($handler)
{
$this->handler = $handler;
add_action('bbp_new_topic', array($this, 'notify_new_topic'), 10, 4);
add_filter('bbp_new_reply', array($this, 'notify_on_reply'), 1, 5);
add_action('falcon.reply.insert', array($this, 'handle_insert'), 20, 2);
}