/**
 * Extends the Date prototype to add various utility methods.
 */
declare global {
    interface Date {
        printTime(): string;
        printMonth(): string;
        printDayWeek(): string;
        setStart(): Date;
        setEnd(): Date;
        addDays(days: number): Date;
        addHours(hours: number): Date;
        addSeconds(seconds: number): Date;
        diffSeconds(date: Date): number;
        diffMinutes(date: Date): number;
        diffHours(date: Date): number;
        diffDays(date: Date): number;
        isBeforeToday(): boolean;
        isAfterToday(): boolean;
        isSameDay(otherDate: Date): boolean;
        isToday(): boolean;
    }
    interface String {
        convertToLocalDate(): Date | null;
        getFromOtherTimeString(date_end: string): string | null;
    }
}
export declare class DateConverter {
    /**
     * Converts a datetime string or an object containing a date string to a local time Date object.
     * If the `keep_only_date` flag is set, it will set the time to the start of the day.
     *
     * @param datetimeStr - A datetime string or an object containing a date string.
     * @param keep_only_date - A flag to determine if only the date should be kept.
     *
     * @returns Date object representing the local time.
     */
    static convertToLocalTime(datetimeStr: {
        date: string;
    } | string | null | undefined, keep_only_date?: boolean): Date | null;
    /**
     * Converts a timestamp into a short date string format, specifically for charts.
     * The format can be adjusted based on the `small` and `time` parameters.
     *
     * @param timestamp - The timestamp to convert.
     * @param small - Flag to determine if the month should be in short format.
     * @param time - Flag to determine if the time should be included in the format.
     *
     * @returns A formatted date string or "Invalid date!" in case of an error.
     */
    static ConvertTimestampToShortString(timestamp: number | Date, small?: boolean, time?: boolean): string;
    /**
     * Get local time string in various formats.
     *
     * @param datetimeStr - Input date in either string or Date format.
     * @param added_seconds - Number of seconds to add to the date.
     * @param isShort - Flag to use a short date format.
     * @param isMicro - Flag to use a micro date format.
     * @param noTime - Flag to omit the time.
     *
     * @returns A formatted date string or null in case of an error.
     */
    static GetLocalTimeString(datetimeStr: string | Date, added_seconds?: number, isShort?: boolean, isMicro?: boolean, noTime?: boolean): string | null;
    /**
     * Gets a descriptive string indicating the time elapsed since `datetime_start` to now.
     *
     * @param datetime_start - The starting date/time.
     * @param local - Optional locale setting.
     * @param abstract - A flag to determine the string format.
     *
     * @returns A formatted string describing the elapsed time.
     */
    static getFromNowString(datetime_start: Date | string, local?: string | null, abstract?: boolean): string | null;
    /**
     * Calculates the relative time difference between two dates and returns it as a string.
     *
     * @param datetime_start - The start date/time.
     * @param datetime_end - The end date/time.
     * @param local - Optional locale setting, defaults to the global `$language.full_local`.
     * @param abstract - Determines if the returned string should use the "short" or "long" style.
     *
     * @returns A string indicating the relative time difference between `datetime_start` and `datetime_end`.
     */
    static getFromOtherTimeString(datetime_start: Date | string, datetime_end: Date | string, local?: string | null, abstract?: boolean): string;
    /**
     * Returns the difference between the current time and a given datetime in the specified dimension.
     *
     * Supported Dimensions:
     * - s: Seconds
     * - m: Minutes
     * - h: Hours
     * - d: Days
     *
     * @param datetimeStr - The given datetime to compare with.
     * @param dim - The dimension to represent the difference in (s/m/h/d).
     *
     * @returns The difference in the specified dimension or null if `datetimeStr` is not provided.
     */
    static getFromNowNumber(datetimeStr: string, dim: "s" | "m" | "h" | "d"): number | null;
    /**
     * Computes the duration string between two datetime values. The result will be formatted as `d:H:M` or `d:H:M:S` based on the `has_second` flag.
     *
     * Examples:
     * - For a duration of 1 day, 2 hours, 15 minutes, and 30 seconds:
     *   - Without seconds: "1d 2:15"
     *   - With seconds: "1d 2:15:30"
     *
     * @param datetime_start - The starting datetime.
     * @param datetime_end - The ending datetime.
     * @param has_second - Flag to determine whether the resulting string should include seconds.
     *
     * @returns A string representation of the duration between the two datetime values in `d:H:M` or `d:H:M:S` format.
     * If the input datetime are invalid, returns an empty string.
     */
    static getDurationOtherTimeString(datetime_start: Date | string, datetime_end: Date | string, has_second?: boolean): string;
    /**
     *
     * @param created_at
     * @returns {boolean}
     */
    static isToday(created_at: Date | string): boolean;
    /**
     * Checks if a given date string is within a specified range of days.
     *
     * @param date_string - The date string to check.
     * @param days - The number of days in the range.
     * @param offset - The offset in days from the current date (default is 0).
     * @returns A boolean indicating whether the date is within the specified day range.
     */
    static inDayRange(date_string: string | null, days: number, offset?: number): boolean;
    static inBetweenDates(test: Date, start: Date | null, end: Date | null): boolean;
    /**
     * Get start of day before (days) days.
     *
     * @param {int | null} days
     * @param {string | date | null} origin_date
     * @returns {null|Date}
     * @constructor
     */
    static GetStartOfDateBefore(days: number, origin_date?: Date | string | null): null | Date;
    /**
     * Get end of day before (days) days.
     *
     * @param  {int | null} days
     * @param {string | date | null} origin_date
     * @returns {null|Date}
     * @constructor
     */
    static GetEndOfDateBefore(days: number, origin_date?: Date | string | null): null | Date;
    /**
     * Check two date in same day.
     *
     * @param {Date} d1
     * @param {Date} d2
     * @returns {boolean}
     * @constructor
     */
    static InSameDay(d1: Date, d2: Date): boolean;
    static SecondsToString(duration: number): string;
    /**
     * Convert date to string for url query builder!
     *
     * @param date
     * @returns {string|*}
     */
    static dateToString(date: Date | string): string | any;
}