fix

src/lib/date.ts

@@ -0,0 +1,107 @@
+// Helpers for Persian (Shamsi) dates and relative time labels used across the site.
+
+const PERSIAN_DIGITS = ['۰', '۱', '۲', '۳', '۴', '۵', '۶', '۷', '۸', '۹'];
+
+/** Convert any latin digits in a string (or a number) to Persian digits. */
+export const toPersianDigits = (value: string | number): string =>
+  String(value).replace(/\d/g, (digit) => PERSIAN_DIGITS[Number(digit)] ?? digit);
+
+type DatedPost = { publishedAt?: string; slug: string; time: string };
+
+/**
+ * Resolve the publish timestamp of a post.
+ *
+ * Posts created by the TASS agent embed `Date.now()` at the end of their slug,
+ * so we can recover a real timestamp even for older posts that only stored the
+ * placeholder string "هم‌اکنون".
+ */
+export const getPublishedAt = (post: DatedPost): Date | null => {
+  if (post.publishedAt) {
+    const date = new Date(post.publishedAt);
+    return Number.isNaN(date.getTime()) ? null : date;
+  }
+
+  const match = post.slug.match(/(\d{13})$/);
+  if (match) {
+    const date = new Date(Number(match[1]));
+    return Number.isNaN(date.getTime()) ? null : date;
+  }
+
+  return null;
+};
+
+/** Derive an ISO timestamp for a post, or null when none can be inferred. */
+export const derivePublishedAt = (post: DatedPost): string | undefined => {
+  const date = getPublishedAt(post);
+  return date ? date.toISOString() : undefined;
+};
+
+/** Exact Shamsi date + time, e.g. "۱۴ تیر ۱۴۰۵، ۱۴:۳۰". */
+export const formatShamsiDate = (date: Date): string => {
+  const formatter = new Intl.DateTimeFormat('fa-IR-u-ca-persian', {
+    year: 'numeric',
+    month: 'long',
+    day: 'numeric',
+    hour: '2-digit',
+    minute: '2-digit',
+  });
+
+  return toPersianDigits(formatter.format(date));
+};
+
+/** Short Shamsi date without time, e.g. "۱۴ تیر ۱۴۰۵". */
+export const formatShamsiDay = (date: Date): string => {
+  const formatter = new Intl.DateTimeFormat('fa-IR-u-ca-persian', {
+    year: 'numeric',
+    month: 'long',
+    day: 'numeric',
+  });
+
+  return toPersianDigits(formatter.format(date));
+};
+
+/**
+ * Relative Persian time label: "هم‌اکنون", "۲ دقیقه پیش", "۱۰ دقیقه پیش",
+ * "۳ ساعت پیش", "۵ روز پیش" — and falls back to an exact Shamsi date for
+ * anything older than a month.
+ */
+export const formatRelativeTime = (date: Date): string => {
+  const now = Date.now();
+  const diffSeconds = Math.max(0, Math.round((now - date.getTime()) / 1000));
+
+  if (diffSeconds < 60) {
+    return 'هم‌اکنون';
+  }
+
+  const diffMinutes = Math.floor(diffSeconds / 60);
+
+  if (diffMinutes < 60) {
+    return `${toPersianDigits(diffMinutes)} دقیقه پیش`;
+  }
+
+  const diffHours = Math.floor(diffMinutes / 60);
+
+  if (diffHours < 24) {
+    return `${toPersianDigits(diffHours)} ساعت پیش`;
+  }
+
+  const diffDays = Math.floor(diffHours / 24);
+
+  if (diffDays < 30) {
+    return `${toPersianDigits(diffDays)} روز پیش`;
+  }
+
+  return formatShamsiDay(date);
+};
+
+/** Relative label for a post, falling back to its stored `time` string. */
+export const formatPostRelativeTime = (post: DatedPost): string => {
+  const date = getPublishedAt(post);
+  return date ? formatRelativeTime(date) : post.time;
+};
+
+/** Exact Shamsi label for a post, falling back to its stored `time` string. */
+export const formatPostShamsiDate = (post: DatedPost): string => {
+  const date = getPublishedAt(post);
+  return date ? formatShamsiDate(date) : post.time;
+};