uptime-kuma/src/util-frontend.js

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import dayjs from "dayjs";
import timezone from "dayjs/plugin/timezone";
import utc from "dayjs/plugin/utc";
import timezones from "timezones-list";
import { localeDirection, currentLocale } from "./i18n";
dayjs.extend(utc);
dayjs.extend(timezone);
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/**
* Returns the offset from UTC in hours for the current locale.
* @returns {number} The offset from UTC in hours.
*
* Generated by Trelent
*/
function getTimezoneOffset(timeZone) {
const now = new Date();
const tzString = now.toLocaleString("en-US", {
timeZone,
});
const localString = now.toLocaleString("en-US");
const diff = (Date.parse(localString) - Date.parse(tzString)) / 3600000;
const offset = diff + now.getTimezoneOffset() / 60;
return -offset;
}
/**
* Returns a list of timezones sorted by their offset from UTC.
* @param {Array} timezones - An array of timezone objects.
* @returns {Array} A list of the given timezones sorted by their offset from UTC.
*
* Generated by Trelent
*/
export function timezoneList() {
let result = [];
for (let timezone of timezones) {
try {
let display = dayjs().tz(timezone.tzCode).format("Z");
result.push({
name: `(UTC${display}) ${timezone.tzCode}`,
value: timezone.tzCode,
time: getTimezoneOffset(timezone.tzCode),
});
} catch (e) {
// Skipping not supported timezone.tzCode by dayjs
}
}
result.sort((a, b) => {
if (a.time > b.time) {
return 1;
}
if (b.time > a.time) {
return -1;
}
return 0;
});
return result;
}
export function setPageLocale() {
const html = document.documentElement;
html.setAttribute("lang", currentLocale() );
html.setAttribute("dir", localeDirection() );
}
/**
* Mainly used for dev, because the backend and the frontend are in different ports.
*/
export function getResBaseURL() {
const env = process.env.NODE_ENV;
if (env === "development" || localStorage.dev === "dev") {
return location.protocol + "//" + location.hostname + ":3001";
} else {
return "";
}
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}