Function filterByPeriod

scripts/analytics.ts:51–64

(events: AnalyticsEvent[], period: string)

 * Filter events by period. Supports "7d", "30d", and "all".
 */
export function filterByPeriod(events: AnalyticsEvent[], period: string): AnalyticsEvent[] {
  if (period === 'all') return events;

  const match = period.match(/^(\d+)d$/);
  if (!match) return events;

  const days = parseInt(match[1], 10);
  const cutoff = new Date(Date.now() - days * 24 * 60 * 60 * 1000);

  return events.filter(e => {
    const d = new Date(e.ts);
    return !isNaN(d.getTime()) && d >= cutoff;
  });
}

/**
 * Format a report string from a list of events.