1
const MINUTE = 60_000;
2
const HOUR = 3_600_000;
3
const DAY = 86_400_000;
4
 
5
export function relativeTime(dateStr: string): string {
6
  const now = Date.now();
7
  const then = new Date(dateStr).getTime();
8
  const diff = now - then;
9
 
10
  if (diff < MINUTE) {
11
    return "just now";
12
  }
13
  if (diff < HOUR) {
14
    const mins = Math.floor(diff / MINUTE);
15
    return `${mins}m ago`;
16
  }
17
  if (diff < DAY) {
18
    const hours = Math.floor(diff / HOUR);
19
    return `${hours}h ago`;
20
  }
21
  if (diff < 7 * DAY) {
22
    const days = Math.floor(diff / DAY);
23
    return `${days}d ago`;
24
  }
25
 
26
  return new Intl.DateTimeFormat(undefined, {
27
    month: "short",
28
    day: "numeric",
29
  }).format(new Date(dateStr));
30
}
31
 
32
export function fullDate(dateStr: string): string {
33
  return new Date(dateStr).toLocaleString();
34
}
35
 
36
export function formatCountdown(expiresAt: string): string {
37
  const diff = new Date(expiresAt).getTime() - Date.now();
38
 
39
  if (diff <= 0) {
40
    return "Expired";
41
  }
42
 
43
  const hours = Math.floor(diff / HOUR);
44
  const mins = Math.floor((diff % HOUR) / MINUTE);
45
 
46
  if (hours > 0) {
47
    return `${hours}h ${mins}m remaining`;
48
  }
49
  return `${mins}m remaining`;
50
}