import type { ISubscription } from "../events/ISubscription";
import { DispatcherBase } from "./DispatcherBase";
import type { IPropagationStatus } from "./IPropagationStatus";
/**
 * Dispatcher base for dispatchers that use promises. Each promise
 * is awaited before the next is dispatched, unless the event is
 * dispatched with the executeAsync flag.
 *
 * @export
 * @abstract
 * @class PromiseDispatcherBase
 * @extends {DispatcherBase<TEventHandler>}
 * @template TEventHandler The type of event handler.
 */
export declare abstract class PromiseDispatcherBase<TEventHandler> extends DispatcherBase<TEventHandler> {
    /**
     * The normal dispatch cannot be used in this class.
     *
     * @protected
     * @param {boolean} executeAsync `True` if the even should be executed async.
     * @param {*} scope The scope of the event. The scope becomes the `this` for handler.
     * @param {IArguments} args The arguments for the event.
     * @returns {(IPropagationStatus | null)} The propagation status, or if an `executeAsync` is used `null`.
     *
     * @memberOf DispatcherBase
     */
    protected _dispatch(executeAsync: boolean, scope: any, args: IArguments): IPropagationStatus | null;
    /**
     * Crates a new subscription.
     *
     * @protected
     * @param {TEventHandler} handler The handler.
     * @param {boolean} isOnce Indicates if the handler should only run once.
     * @returns {ISubscription<TEventHandler>} The subscription.
     *
     * @memberOf PromiseDispatcherBase
     */
    protected createSubscription(handler: TEventHandler, isOnce: boolean): ISubscription<TEventHandler>;
    /**
     * Generic dispatch will dispatch the handlers with the given arguments.
     *
     * @protected
     * @param {boolean} executeAsync `True` if the even should be executed async.
     * @param {*} scope The scope of the event. The scope becomes the `this` for handler.
     * @param {IArguments} args The arguments for the event.
     * @returns {(IPropagationStatus | null)} The propagation status, or if an `executeAsync` is used `null`.
     *
     * @memberOf DispatcherBase
     */
    protected _dispatchAsPromise(executeAsync: boolean, scope: any, args: IArguments): Promise<IPropagationStatus | null>;
}