import * as Tp from 'thingpedia';
import * as ThingTalk from 'thingtalk';
import Engine from '../../engine';
/**
 * An object that is able to convert structured ThingTalk results
 * into a textual representation suitable to send as a notification
 * or a message.
 *
 * This is used to implement `$result` ThingTalk, and to dispatch
 * notifications to third-party services like Twilio.
 *
 * Internally, it uses the transaction state machine, which is
 * instantiated with a special state for every result.
 */
export default class NotificationFormatter {
    private _engine;
    private _cardFormatter;
    private _policy;
    private _executor;
    private _langPack;
    /**
     * Construct a new formatter for a given Genie engine.
     */
    constructor(engine: Engine);
    initialize(): Promise<void>;
    formatNotification(appName: string | null, program: ThingTalk.Ast.Program, outputType: string, outputValue: Record<string, unknown>): Promise<Tp.FormatObjects.FormattedObject[]>;
}