import { Duration } from 'date-fns';
import { AbsoluteTimeRange } from './time';
export declare const ONE_SECOND_IN_MS = 1000;
export declare const ONE_MINUTE_IN_MS = 60000;
export declare const ONE_HOUR_IN_MS = 3600000;
export declare const ONE_DAY_IN_MS = 86400000;
export declare const ONE_WEEK_IN_MS = 604800000;
export declare const ONE_YEAR_IN_MS = 31536000000;
type MillisecondsDurationString = `${number}ms`;
type SecondsDurationString = `${number}s`;
type MinutesDurationString = `${number}m`;
type HoursDurationString = `${number}h`;
type DaysDurationString = `${number}d`;
type WeeksDurationString = `${number}w`;
type YearsDurationString = `${number}y`;
export type DurationString = Exclude<`${YearsDurationString | ''}${WeeksDurationString | ''}${DaysDurationString | ''}${HoursDurationString | ''}${MinutesDurationString | ''}${SecondsDurationString | ''}${MillisecondsDurationString | ''}`, ''>;
export declare const DURATION_REGEX: RegExp;
/**
 * Parses a DurationString into a Duration object with numeric values that can
 * be used to do Date math. Throws if not a valid duration string.
 */
export declare function parseDurationString(durationString: string): Duration;
/**
 * Returns true if the given string is a valid DurationString.
 */
export declare function isDurationString(maybeDuration: string): maybeDuration is DurationString;
export declare function formatDuration(duration: Duration): DurationString;
export declare function intervalToDuration(timeRange: AbsoluteTimeRange): Duration;
export declare function convertTimeToDuration(durationInMs: number): Duration;
export {};
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