56 lines
1.4 KiB
TypeScript
56 lines
1.4 KiB
TypeScript
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import { Content } from "../../constants";
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import { isString } from "lodash";
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import { t } from "../../i18next_wrapper";
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/** Used for every new account the first time the Device page is loaded. */
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const ONLY_ONCE = {
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need_to_talk: true
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};
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export function inferTimezone(current: string | undefined): string {
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if (current) {
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return current;
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}
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const browserTime = maybeResolveTZ();
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if (browserTime) {
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if (ONLY_ONCE.need_to_talk) {
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alert(t(Content.TIMEZONE_GUESS_BROWSER));
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ONLY_ONCE.need_to_talk = false;
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}
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// WARNING SIDE EFFECTS!!!
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return browserTime;
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}
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if (ONLY_ONCE.need_to_talk) {
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alert(t(Content.TIMEZONE_GUESS_UTC));
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ONLY_ONCE.need_to_talk = false;
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}
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return "UTC";
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}
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/** Sometimes, a mismatch between the device time zone and the user time zone
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* can occur. When this happens,
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*/
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export function timezoneMismatch(botTime: string | undefined,
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userTime: string | undefined = maybeResolveTZ()): boolean {
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if (isString(botTime) && isString(userTime)) {
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return botTime.toUpperCase() !== userTime.toUpperCase();
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} else {
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// Don't show warnings if TZ data is unavailable.
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return false;
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}
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}
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/** Use browser's i18n functionality to guess timezone. */
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function maybeResolveTZ(): string | undefined {
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if (Intl && Intl.DateTimeFormat) {
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// WARNING SIDE EFFECTS!!!
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return Intl
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.DateTimeFormat()
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.resolvedOptions()
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.timeZone;
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}
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return undefined;
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}
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