33 lines
1.5 KiB
TypeScript
33 lines
1.5 KiB
TypeScript
const numberFormat = new Intl.NumberFormat('en-US', { maximumFractionDigits: 1 });
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export function metricNumber(value: number): string {
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if (!Number.isFinite(value)) return '—';
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if (value > 0 && value < 0.1) return '<0.1';
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return numberFormat.format(value);
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}
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export function metricPercent(value: number, total: number): string {
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if (!Number.isFinite(value) || !Number.isFinite(total) || total <= 0) return '—';
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const percent = 100 * value / total;
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return percent > 0 && percent < 0.1 ? '<0.1%' : `${percent.toFixed(1)}%`;
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}
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/** Input is hours; retain short, real observations instead of rounding them to zero. */
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export function metricDuration(hours: number): string {
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if (!Number.isFinite(hours) || hours < 0) return '—';
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if (hours === 0) return '0 h';
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const seconds = hours * 3600;
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if (seconds < 1) return '<1 s';
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if (seconds < 60) return `${numberFormat.format(seconds)} s`;
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if (hours < 0.1) return `${numberFormat.format(seconds / 60)} min`;
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return `${numberFormat.format(hours)} h`;
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}
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/** Missing evidence always sorts last, in either direction. */
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export function compareMetricValues(left: number | null, right: number | null, direction: 'asc' | 'desc'): number {
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const a = left !== null && Number.isFinite(left) ? left : null;
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const b = right !== null && Number.isFinite(right) ? right : null;
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if (a === null || b === null) return a === b ? 0 : a === null ? 1 : -1;
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return (a - b) * (direction === 'asc' ? 1 : -1);
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}
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