| 1 | import { headers } from "next/headers"; |
| 2 | import { visitorTimezoneHeader } from "../../src/VisitorTimezone.ts"; |
| 3 | |
| 4 | function formatTime( |
| 5 | value: string | number, |
| 6 | locale: string, |
| 7 | timeZone: string, |
| 8 | ): { iso: string; label: string } { |
| 9 | const date = new Date(value); |
| 10 | if (Number.isNaN(date.getTime())) { |
| 11 | return { iso: "", label: "" }; |
| 12 | } |
| 13 | return { |
| 14 | iso: date.toISOString(), |
| 15 | label: date.toLocaleString(locale, { |
| 16 | dateStyle: "medium", |
| 17 | timeStyle: "medium", |
| 18 | timeZone, |
| 19 | }), |
| 20 | }; |
| 21 | } |
| 22 | |
| 23 | async function visitorFormat(): Promise<{ locale: string; timeZone: string }> { |
| 24 | const h = await headers(); |
| 25 | const locale = h.get("accept-language")?.split(",")[0]?.split(";")[0]?.trim(); |
| 26 | return { |
| 27 | locale: locale || "en-US", |
| 28 | timeZone: h.get(visitorTimezoneHeader()) ?? "UTC", |
| 29 | }; |
| 30 | } |
| 31 | |
| 32 | /** |
| 33 | * Server timestamp. Visitor locale + Cloudflare timezone, unless `cached` |
| 34 | * (UTC) for prerendered routes that must not read request headers. |
| 35 | */ |
| 36 | export async function LocalTime({ |
| 37 | value, |
| 38 | cached = false, |
| 39 | testId, |
| 40 | }: { |
| 41 | value: string | number; |
| 42 | cached?: boolean; |
| 43 | testId?: string; |
| 44 | }) { |
| 45 | const { locale, timeZone } = cached |
| 46 | ? { locale: "en-US", timeZone: "UTC" } |
| 47 | : await visitorFormat(); |
| 48 | const { iso, label } = formatTime(value, locale, timeZone); |
| 49 | |
| 50 | return ( |
| 51 | <time data-testid={testId} dateTime={iso} title={iso}> |
| 52 | {label} |
| 53 | </time> |
| 54 | ); |
| 55 | } |