8b90cb6489
- Extract shared defaultReferencePeriod helper (src/utils/referencePeriod.ts) - useHighlights now reads ?refY=YYYY&refM=MM, defaults to previous month - getHighlights signature: (referenceYear, referenceMonth, ytdYear, windowDays, ...) - YTD tile pinned to Jan 1 of current civil year, independent of reference month - CompareReferenceMonthPicker surfaced on /reports/highlights - Hub highlights panel inherits the same default via useHighlights - useCartes and useCompare now delegate their default-period helpers to the shared util
16 lines
598 B
TypeScript
16 lines
598 B
TypeScript
/**
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* Shared helper used by reports that pivot on a reference month
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* (Highlights, Compare, Cartes). Returns the calendar month immediately
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* preceding `today` — January wraps to December of the previous year.
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*
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* Kept as a pure function so every consumer can unit-test its own wiring
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* with a deterministic `today` override.
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*/
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export function defaultReferencePeriod(
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today: Date = new Date(),
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): { year: number; month: number } {
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const y = today.getFullYear();
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const m = today.getMonth() + 1;
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if (m === 1) return { year: y - 1, month: 12 };
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return { year: y, month: m - 1 };
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}
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