import { UTCDate } from "@date-fns/utc";
import type { IActivityHandler } from "../../IActivityHandler";
/** Defines inputs to the Calculate Date activity. */
export interface CalculateDateInputs {
    date: "today" | "this-week" | "this-month" | "this-year" | string;
    useUtc?: boolean;
    offsetAmount?: number;
    offsetUnits?: "day" | "week" | "month" | "year" | string;
}
/** Defines outputs to the Calculate Date activity. */
export interface CalculateDateOutputs {
    /** @description The result as a Date object. */
    date: Date;
    /** @description The result as the number of milliseconds since the Unix Epoch. Example: `1360017870652`. */
    value: number;
}
export declare class CalculateDate implements IActivityHandler {
    static readonly action = "gcx:wf:core::CalculateDate";
    static readonly suite = "gcx:wf:builtin";
    execute(inputs: CalculateDateInputs): CalculateDateOutputs;
    getStartDate(startDate: string, utc: boolean): Date | UTCDate;
    private getMonthString;
    /**
     * Gets the time zone string for creating a new Date from a string.
     * We return an empty string for local values as that's automatically replaced with the local time zone.
     * Since it can seem misleading that Date.getTimezoneOffset() always returns the local offset
     * regardless of the value of the date, I prefer to not even reference a Date here.
     * @param utc
     * @returns The time zone string.
     */
    private getTimeZone;
    private offsetDate;
    /**
     * Removes the time from the supplied date, leaving the year, month and date intact.
     * @param date The date to be altered.
     */
    private removeTime;
}