Scalr\Api\Service\User\V1beta0\Adapter\OrchestrationRuleAdapter::_trigger PHP Method

    public function _trigger($from, $to, $action)
    {
        switch ($action) {
            case static::ACT_CONVERT_TO_OBJECT:
                /* @var $from OrchestrationRule */
                switch ($from->eventName) {
                    case '*':
                        $to->trigger = ['triggerType' => static::TRIGGER_ALL_EVENTS];
                        break;
                    default:
                        $to->trigger = ['triggerType' => static::TRIGGER_SINGLE_EVENT, 'event' => ['id' => $from->eventName]];
                        break;
                }
                break;
            case static::ACT_CONVERT_TO_ENTITY:
                /* @var $to OrchestrationRule */
                if (empty($from->trigger->triggerType)) {
                    throw new ApiErrorException(400, ErrorMessage::ERR_INVALID_STRUCTURE, "Missed trigger type");
                }
                switch ($from->trigger->triggerType) {
                    case static::TRIGGER_ALL_EVENTS:
                        $to->eventName = '*';
                        break;
                    case static::TRIGGER_SINGLE_EVENT:
                        if (!($event = ApiController::getBareId($from->trigger, 'event'))) {
                            throw new ApiErrorException(400, ErrorMessage::ERR_INVALID_STRUCTURE, "Missed property trigger:id");
                        }
                        $to->eventName = $event;
                        break;
                    default:
                        throw new ApiErrorException(400, ErrorMessage::ERR_INVALID_VALUE, "Unexpected trigger type");
                }
                break;
            case static::ACT_GET_FILTER_CRITERIA:
                return [['eventName' => $from->trigger]];
        }
    }