/**
	 * @return bool
	 */
	public function cancel()
	{
		$type 			= get_class($this) . '::' . __FUNCTION__;
		$title			= self::STATUS_CANCELLED . ' ' . $this->getRisRequest()->getValue('id');
		$currentStatus 	= $this->getRequestRisStatus();
		$status 		= isset($this->workflow[$currentStatus]) ? $this->workflow[$currentStatus] : false;
		$users 			= $status[1]['notification'];

		$this->risRequest->setStatus(self::STATUS_CANCELLED);

		if ($currentStatus == self::STATUS_CANCELLED) {
			return true;
		} else if ( $currentStatus == self::STATUS_WAIT_SUPERIOR || $currentStatus == self::STATUS_WAIT_EPES_APPROVAL) {

			// head or his backups
			if (self::STATUS_WAIT_EPES_APPROVAL == $currentStatus) {
				$user = current($users);
				$this->setRisPerson($user);
				// some protected
				$this->sendMessageToUserAndBackups($user, $title, $title, $type);
			} elseif (self::STATUS_WAIT_SUPERIOR == $currentStatus) { // superior or his backups
				$superior = $this->getSuperior();
				// some protected
				$this->sendMessageToUserAndBackups($superior, $title, $title, $type);
			}

		} else {
			foreach ($users as $user) {
				$this->getMessage()->postWithDynamicRequest($this->setRisPerson($user)->getRisPerson(), $title, $title, $type, false, $this->getRisRequest()->getValue('id'));
			}
		}

		// some protected
		$this->notifyStatusChangeOrs($type);

		return true;
	}