import { TLanguage } from '@cainiaofe/cn-i18n';
import { ThisContext } from '../common/type';
import { AvailableDate, FormatOpts, Timestamp, Timezone } from './type';
/**
 * 根据语种信息获取日期格式化配置
 * @param lang 语种
 * @returns
 */
export declare const getDateFormatConf: (lang: TLanguage) => {
    s: string;
    m: string;
    H: string;
    D: string;
    M: string;
    W: string;
    Q: string;
    Y: string;
    HH: string;
    Hm: string;
    Hms: string;
};
/**
 * 获取系统时区信息
 * @returns
 */
export declare const getTimezone: (this: ThisContext) => string;
/**
 * 根据当前语种&时区格式化时间戳
 * @param this
 * @param num
 * @param opts
 * @returns
 */
export declare const dateFormat: (this: ThisContext, num: Timestamp, opts: FormatOpts) => string;
/**
 * 根据当前语种&时区获取时间戳
 * @param this
 * @param dateStr string
 * @param opts FormatOpts
 * @returns
 */
export declare const dateTimestamp: (this: ThisContext, dateStr?: string, opts?: FormatOpts) => number;
/**
 * 根据时间戳获取当前日期偏移量
 * @param this
 * @param num
 * @param timezone
 */
export declare const getTimezoneOffset: (this: ThisContext, num: Timestamp, timezone: Timezone) => {
    offset: number;
    offsetText: string;
};
/**
 * 根据时间戳获取当前日期偏移量
 * @param this
 * @param num
 * @param timezone
 * @param lang
 * @returns
 */
export declare const getTimezoneName: (this: ThisContext, num?: Timestamp, timezone?: Timezone, lang?: TLanguage) => string | null;
/**
 * 设置 dayjs 对象时区
 * @param this
 * @param day
 * @param timezone
 * @param keepLocalTime 是否保持本地时间
 * @returns 新的 dayjs 对象
 */
export declare const dayjsTz: (this: ThisContext, day: AvailableDate, timezone?: Timezone, keepLocalTime?: boolean) => import("dayjs").Dayjs;