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/**
* Format a Unix timestamp (seconds) into a relative time string.
* Examples: "now", "5m", "2h", "3d", "1w", "2mo", "1y"
*/
export function formatRelativeTime(timestamp: number): string {
const now = Math.floor(Date.now() / 1000); // Current time in seconds
const diffSeconds = now - timestamp;
// Handle future timestamps (shouldn't happen, but be defensive)
if (diffSeconds < 0) {
return "now";
}
// Less than 1 minute
if (diffSeconds < 60) {
return "now";
}
// Less than 1 hour (show minutes)
if (diffSeconds < 3600) {
const minutes = Math.floor(diffSeconds / 60);
return `${minutes}m`;
}
// Less than 24 hours (show hours)
if (diffSeconds < 86400) {
const hours = Math.floor(diffSeconds / 3600);
return `${hours}h`;
}
// Less than 7 days (show days)
if (diffSeconds < 604800) {
const days = Math.floor(diffSeconds / 86400);
return `${days}d`;
}
// Less than 4 weeks (show weeks)
if (diffSeconds < 2419200) {
const weeks = Math.floor(diffSeconds / 604800);
return `${weeks}w`;
}
// Less than 12 months (show months)
if (diffSeconds < 31536000) {
const months = Math.floor(diffSeconds / 2592000); // Approximate: 30 days per month
return `${months}mo`;
}
// 12 months or more (show years)
const years = Math.floor(diffSeconds / 31536000);
return `${years}y`;
}
/**
* Format session name with relative time indicator.
* Example: "Session Name • 2h"
*/
export function formatSessionLabel(name: string, updatedAt: number): string {
const relativeTime = formatRelativeTime(updatedAt);
return `${name} • ${relativeTime}`;
}
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