107 lines
2.9 KiB
TypeScript
107 lines
2.9 KiB
TypeScript
import dayjs, { type Dayjs } from "dayjs"
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import localizedFormat from "dayjs/plugin/localizedFormat"
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import relativeTime from "dayjs/plugin/relativeTime"
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import "dayjs/locale/fr"
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import "dayjs/locale/en"
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dayjs.extend(localizedFormat)
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dayjs.extend(relativeTime)
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const SUPPORTED_LOCALES = new Set(["fr", "en", "de", "es", "it", "pt", "nl", "pl", "ja", "zh"])
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let activeLocale: string | null = null
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/** Browser locale for dayjs (client); stable fallback on server. */
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export function resolveMailDateLocale(): string {
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if (typeof navigator === "undefined") return "fr"
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const base = navigator.language.split("-")[0]?.toLowerCase() ?? "fr"
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return SUPPORTED_LOCALES.has(base) ? base : "en"
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}
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export function ensureMailDateLocale(): void {
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const next = resolveMailDateLocale()
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if (activeLocale === next) return
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dayjs.locale(next)
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activeLocale = next
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}
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export function parseMailDate(iso: string): Dayjs | null {
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if (!iso?.trim()) return null
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const d = dayjs(iso)
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return d.isValid() ? d : null
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}
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export type MailDateDisplayVariant = "list" | "preview" | "detail"
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const TWO_WEEKS_MS = 14 * 24 * 60 * 60 * 1000
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function relativeSuffix(d: Dayjs, now: Dayjs): string {
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if (d.isAfter(now)) return ""
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return ` (${d.fromNow()})`
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}
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/** Colonne date de la liste (fuseau navigateur). */
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export function formatMailListDate(iso: string, now: Dayjs = dayjs()): string {
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ensureMailDateLocale()
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const d = parseMailDate(iso)
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if (!d) return "—"
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if (d.isSame(now, "day")) {
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return d.format("LT")
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}
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if (d.isSame(now, "year")) {
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return d.format("D MMM")
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}
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return d.format("L")
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}
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/** En-tête / aperçu d’un message (fuseau navigateur). */
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export function formatMailPreviewDate(iso: string, now: Dayjs = dayjs()): string {
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ensureMailDateLocale()
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const d = parseMailDate(iso)
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if (!d) return "—"
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const time = d.format("LT")
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if (d.isSame(now, "day")) {
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return `${time}${relativeSuffix(d, now)}`
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}
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const msAgo = now.valueOf() - d.valueOf()
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const withinTwoWeeks = msAgo >= 0 && msAgo < TWO_WEEKS_MS
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const datePart = d.format("ddd D MMM")
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if (withinTwoWeeks) {
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return `${datePart} ${time}${relativeSuffix(d, now)}`
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}
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if (d.isSame(now, "year")) {
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return `${datePart} ${time}`
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}
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return `${d.format("ddd D MMM YYYY")} ${time}`
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}
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/** Citations, impression, panneau « détails » (sans relatif). */
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export function formatMailDetailDate(iso: string, now: Dayjs = dayjs()): string {
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ensureMailDateLocale()
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const d = parseMailDate(iso)
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if (!d) return "—"
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const time = d.format("LT")
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const datePart = d.format("ddd D MMM")
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if (d.isSame(now, "year")) {
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return `${datePart} ${time}`
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}
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return `${d.format("ddd D MMM YYYY")} ${time}`
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}
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export function formatMailDate(iso: string, variant: MailDateDisplayVariant): string {
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switch (variant) {
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case "list":
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return formatMailListDate(iso)
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case "preview":
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return formatMailPreviewDate(iso)
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case "detail":
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return formatMailDetailDate(iso)
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}
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}
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