4a63149338
Formats ISO timestamps as `Nm ago` / `Nh ago` / `Nd ago`, falling back to an absolute locale date string for values older than 30 days. Used by the alert DataTable Age column. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
13 lines
580 B
TypeScript
13 lines
580 B
TypeScript
export function formatRelativeTime(iso: string, now: Date = new Date()): string {
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const then = new Date(iso).getTime();
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const diffSec = Math.max(0, Math.floor((now.getTime() - then) / 1000));
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if (diffSec < 30) return 'just now';
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if (diffSec < 3600) return `${Math.floor(diffSec / 60)}m ago`;
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if (diffSec < 86_400) return `${Math.floor(diffSec / 3600)}h ago`;
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const diffDays = Math.floor(diffSec / 86_400);
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if (diffDays < 30) return `${diffDays}d ago`;
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return new Date(iso).toLocaleDateString('en-GB', {
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year: 'numeric', month: 'short', day: '2-digit',
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});
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}
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