@eristack/business-calendar/dist/index.js

Business days and holidays on YYYY-MM-DD wall dates — no timestamp import in core

import {
  BusinessCalendarParseError,
  addWallDays,
  normalizeWallDate,
  wallDateDayOfWeek
} from "./chunk-YHRRW3E4.js";

// src/core/calendar.ts
function normalizeWeekendDays(days) {
  const set = /* @__PURE__ */ new Set();
  for (const day of days) {
    if (!Number.isInteger(day) || day < 0 || day > 6) {
      throw new BusinessCalendarParseError(
        `weekendDays entry ${day} must be an integer 0\u20136 (Sun\u2013Sat)`
      );
    }
    set.add(day);
  }
  return set;
}
function createBusinessCalendar(options) {
  const weekendDays = normalizeWeekendDays(options.weekendDays);
  const holidays = new Set(
    options.holidays.map((h) => normalizeWallDate(h))
  );
  function isBusinessDay(date) {
    const wall = normalizeWallDate(date);
    if (holidays.has(wall)) {
      return false;
    }
    const dow = wallDateDayOfWeek(wall);
    return !weekendDays.has(dow);
  }
  function nextBusinessDay(date) {
    let cursor = normalizeWallDate(date);
    do {
      cursor = addWallDays(cursor, 1);
    } while (!isBusinessDay(cursor));
    return cursor;
  }
  function addBusinessDays(date, days) {
    if (!Number.isInteger(days)) {
      throw new BusinessCalendarParseError("days must be an integer");
    }
    let cursor = normalizeWallDate(date);
    if (days === 0) {
      return cursor;
    }
    const step = days > 0 ? 1 : -1;
    let remaining = Math.abs(days);
    while (remaining > 0) {
      cursor = addWallDays(cursor, step);
      if (isBusinessDay(cursor)) {
        remaining -= 1;
      }
    }
    return cursor;
  }
  return { isBusinessDay, nextBusinessDay, addBusinessDays };
}
export {
  BusinessCalendarParseError,
  addWallDays,
  createBusinessCalendar,
  normalizeWallDate,
  wallDateDayOfWeek
};
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