import { InjectionToken } from '@angular/core';
/**
 * Represents the Time Difference in the different time units
 *
 * @public
 * @api
 */
export interface TimeDiff {
    seconds: number;
    minutes: number;
    hours: number;
    months: number;
    days: number;
    years: number;
    isFuture?: boolean;
}
/**
 * Function Type for the `TimeDiffGenerator`
 *
 * @public
 * @api
 */
export declare type TimeDiffGenerator = (diff: TimeDiff) => string;
/**
 * Custom `TimeDiffGenerator` Injection Token
 *
 * @public
 * @api
 */
export declare const CUSTOM_TIME_DIFF_GENERATOR: InjectionToken<TimeDiffGenerator>;
/**
 * Return a respective textual representation of the input, as the input is a timespan that has been passed.
 *
 * @param diff The time diff object
 * @public
 * @api
 */
export declare const defaultTimeDiffGenerator: TimeDiffGenerator;
export declare const getPastDiffString: (diff: TimeDiff) => string;
export declare const getFutureDiffString: (diff: TimeDiff) => string;
/**
 * Provides the TimeDiffGenerator preferring a custom provider for internal usage
 *
 * @internal
 */
export declare const TIME_DIFF_GENERATOR: InjectionToken<TimeDiffGenerator>;
/**
 * TimeDiff Factory
 *
 * @param seconds The time difference in seconds. Negative values are considered as a future event
 * @internal
 */
export declare const createTimeDiff: (seconds: number) => TimeDiff;