nezha_dash/app/[locale]/(main)/header.tsx

"use client";

import { useTranslations } from 'next-intl';
import React, { useEffect, useRef, useState } from "react";
import Image from "next/image";
import { Separator } from "../../../components/ui/separator";
import { DateTime } from "luxon";
import { ModeToggle } from "../../../components/ThemeSwitcher";
function Header() {
  const t = useTranslations("Header");
  return <div className="mx-auto w-full max-w-5xl">
      <section className="flex items-center justify-between">
        <section className="flex items-center text-base font-medium">
          <div className="mr-1 flex flex-row items-center justify-start">
            <Image width={40} height={40} unoptimized alt="apple-touch-icon" src={"/apple-touch-icon.png"} className="relative !m-0 h-6 w-6 border-2 border-white object-cover object-top !p-0 transition duration-500 group-hover:z-30 group-hover:scale-105" />
          </div>
          NezhaDash
          <Separator orientation="vertical" className="mx-2 hidden h-4 w-[1px] md:block" />
          <p className="hidden text-sm font-medium opacity-40 md:block">{t('p_1079-1199_Simpleandbeautifuldashbo')}</p>
        </section>
        <ModeToggle />
      </section>
      <Overview />
    </div>;
}

// https://github.com/streamich/react-use/blob/master/src/useInterval.ts
const useInterval = (callback: Function, delay?: number | null) => {
  const savedCallback = useRef<Function>(() => {});
  useEffect(() => {
    savedCallback.current = callback;
  });
  useEffect(() => {
    if (delay !== null) {
      const interval = setInterval(() => savedCallback.current(), delay || 0);
      return () => clearInterval(interval);
    }
    return undefined;
  }, [delay]);
};
function Overview() {
  const t = useTranslations("Overview");
  const [mouted, setMounted] = useState(false);
  useEffect(() => {
    setMounted(true);
  }, []);
  const timeOption = DateTime.TIME_SIMPLE;
  timeOption.hour12 = true;
  const [timeString, setTimeString] = useState(DateTime.now().setLocale("en-US").toLocaleString(timeOption));
  useInterval(() => {
    setTimeString(DateTime.now().setLocale("en-US").toLocaleString(timeOption));
  }, 1000);
  return <section className={"mt-10 flex flex-col md:mt-16"}>
      <p className="text-base font-semibold">{t('p_2277-2331_Overview')}</p>
      <div className="flex items-center gap-1.5">
        <p className="text-sm font-medium opacity-50">{t('p_2390-2457_wherethetimeis')}</p>
        {mouted && <p className="opacity-1 text-sm font-medium">{timeString}</p>}
      </div>
    </section>;
}
export default Header;