@eristack/business-calendar/dist/chunk-YHRRW3E4.js

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

// src/core/errors.ts
var BusinessCalendarParseError = class extends Error {
  code = "BUSINESS_CALENDAR_PARSE_ERROR";
  constructor(message) {
    super(message);
    this.name = "BusinessCalendarParseError";
  }
};

// src/core/wall-date.ts
var WALL_DATE_RE = /^(\d{4})-(\d{2})-(\d{2})$/;
function normalizeWallDate(value) {
  const trimmed = value.trim();
  const match = WALL_DATE_RE.exec(trimmed);
  if (!match) {
    throw new BusinessCalendarParseError(
      `Invalid wall date "${value}" \u2014 expected YYYY-MM-DD`
    );
  }
  const year = Number(match[1]);
  const month = Number(match[2]);
  const day = Number(match[3]);
  const utc = Date.UTC(year, month - 1, day);
  const check = new Date(utc);
  if (check.getUTCFullYear() !== year || check.getUTCMonth() !== month - 1 || check.getUTCDate() !== day) {
    throw new BusinessCalendarParseError(`Invalid calendar date "${value}"`);
  }
  const mm = String(month).padStart(2, "0");
  const dd = String(day).padStart(2, "0");
  return `${year}-${mm}-${dd}`;
}
function wallDateDayOfWeek(date) {
  const normalized = normalizeWallDate(date);
  const [y, m, d] = normalized.split("-").map(Number);
  return new Date(Date.UTC(y, m - 1, d)).getUTCDay();
}
function addWallDays(date, days) {
  const normalized = normalizeWallDate(date);
  const [y, m, d] = normalized.split("-").map(Number);
  const next = new Date(Date.UTC(y, m - 1, d));
  next.setUTCDate(next.getUTCDate() + days);
  const ny = next.getUTCFullYear();
  const nm = String(next.getUTCMonth() + 1).padStart(2, "0");
  const nd = String(next.getUTCDate()).padStart(2, "0");
  return `${ny}-${nm}-${nd}`;
}

export {
  BusinessCalendarParseError,
  normalizeWallDate,
  wallDateDayOfWeek,
  addWallDays
};
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