import { Observable } from 'rxjs';
import { InjectionToken } from '@angular/core';
import * as i0 from "@angular/core";
/**
 * The date format options schema.
 */
export interface ISecondFormatOptions {
    /**
     * Stream that triggers a re-render of the component.
     *
     */
    redraw$: Observable<void>;
}
/**
 * `ui-secondformat` injection token for the `options`.
 *
 */
export declare const UI_SECONDFORMAT_OPTIONS: InjectionToken<Observable<void>>;
/**
 * A directive that formats a given number of `seconds` into a human readable format.
 *
 * eg:
 * For input `61` -> output `1 minute` with the tooltip PT1M1S.
 * Depends On:
 * - [luxon](https://www.npmjs.com/package/luxon)
 * - [humanize-duration](https://www.npmjs.com/package/humanize-duration)
 *
 * @export
 */
export declare class UiSecondFormatDirective {
    /**
     * The number of `seconds` that need to be formatted.
     *
     */
    get seconds(): number | null;
    set seconds(seconds: number | null);
    /**
     * @internal
     */
    tooltip$: Observable<string | undefined>;
    /**
     * @internal
     */
    text$: Observable<string>;
    protected _text?: HTMLElement;
    private _seconds$;
    private _units;
    /**
     * @ignore
     */
    constructor(options: ISecondFormatOptions);
    private _mapSecondsToDuration;
    private _mapDurationToText;
    private _mapDurationToTooltip;
    private _getDurationLargestUnit;
    static ɵfac: i0.ɵɵFactoryDeclaration<UiSecondFormatDirective, [{ optional: true; }]>;
    static ɵcmp: i0.ɵɵComponentDeclaration<UiSecondFormatDirective, "ui-secondformat", never, { "seconds": "seconds"; }, {}, never, never, false, never>;
}