import { BindingEngine } from "aurelia-binding";
import { LoggerFactory, PropertyObserver } from "@ssv/au-core";
import { SnackbarRef, SnackbarOptions } from "./snackbar-ref";
/**
 * Service to dispatch snackbar messages.
 */
export declare class SnackbarService {
    private bindingEngine;
    /** Current activated `SnackbarRef`. */
    activeItem: SnackbarRef | null;
    activeItem$: PropertyObserver<SnackbarRef | null>;
    private items;
    private logger;
    constructor(loggerFactory: LoggerFactory, bindingEngine: BindingEngine);
    /**
     * Opens a snackbar with a message and an optional action.
     *
     * @param {string} message message to show.
     * @param {string} [action] label for the action button.
     * @param {SnackbarOptions} [options] Additional configuration options for the snackbar.
     */
    open(message: string, action?: string, options?: SnackbarOptions): SnackbarRef;
    /** Dismiss the current active item. */
    dismiss(): void;
    /** Dismisses all items which includes the queued and also the active. */
    dismissAll(): void;
    private handleNext();
    private handleDismissWhenQueued(item, dismiss$$);
}