Thomas Demirdjian
38 lines
1.0 KiB
JavaScript
38 lines
1.0 KiB
JavaScript
const normalizeDate = (input) =>
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typeof input?.toDate === "function" ? input.toDate() : new Date(input);
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const buildMonthKey = (timestamp) => {
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const date = normalizeDate(timestamp);
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const year = date.getUTCFullYear();
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const month = String(date.getUTCMonth() + 1).padStart(2, "0");
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return `${year}-${month}`;
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};
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const buildPreviousMonthContext = (referenceDate) => {
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const current = referenceDate ? new Date(referenceDate) : new Date();
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current.setUTCHours(0, 0, 0, 0);
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current.setUTCDate(1);
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const target = new Date(current);
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target.setUTCMonth(target.getUTCMonth() - 1);
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const year = target.getUTCFullYear();
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const monthIndex = target.getUTCMonth();
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const rangeStart = new Date(Date.UTC(year, monthIndex, 1, 0, 0, 0, 0));
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const rangeEnd = new Date(Date.UTC(year, monthIndex + 1, 0, 23, 59, 59, 999));
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const monthKey = buildMonthKey(rangeStart);
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return {
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year,
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month: monthIndex + 1,
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monthKey,
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rangeStart,
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rangeEnd,
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};
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};
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module.exports = {
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buildMonthKey,
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buildPreviousMonthContext,
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};
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