swedish-salary-day/mjs/index2.mjs

Calculate the next or previous salary payout date according to configured rules.

import { isHoliday } from 'se-bank-holidays'; // Config for which day

const defaultConfig = {
  dayOfMonth: 25,
  resolveSaturday: 'previous-work-day',
  resolveSunday: 'previous-work-day',
  isHoliday: isHoliday
};

function nextSalaryDay(referenceDate, config = defaultConfig) {
  if (typeof referenceDate === 'number') {
    // eslint-disable-next-line no-param-reassign
    referenceDate = new Date(referenceDate);
  }

  let salaryDay = new Date(referenceDate.getFullYear(), referenceDate.getMonth(), config.dayOfMonth + 1);
  salaryDay.setUTCMinutes(0);
  salaryDay.setUTCHours(0);

  if (referenceDate > salaryDay) {
    salaryDay.setMonth(salaryDay.getMonth() + 1);
    salaryDay.setUTCMinutes(0);
    salaryDay.setUTCHours(0);
  }

  salaryDay = setSalaryDay(salaryDay, config);
  return salaryDay;
}

function previousSalaryDay(referenceDate, config = defaultConfig) {
  if (typeof referenceDate === 'number') {
    // eslint-disable-next-line no-param-reassign
    referenceDate = new Date(referenceDate);
  }

  let salaryDay = new Date(referenceDate.getFullYear(), referenceDate.getMonth(), config.dayOfMonth + 1);
  salaryDay.setUTCMinutes(0);
  salaryDay.setUTCHours(0);

  if (referenceDate < salaryDay) {
    salaryDay.setMonth(salaryDay.getMonth() - 1);
    salaryDay.setUTCMinutes(0);
    salaryDay.setUTCHours(0);
  }

  salaryDay = setSalaryDay(salaryDay, config);
  return salaryDay;
}

const SATURDAY = 6;
const SUNDAY = 0;

function setSalaryDay(date, config) {
  const dayOfWeek = date.getDay();

  if (dayOfWeek === SATURDAY) {
    date.setDate(date.getDate() + (config.resolveSaturday === 'previous-work-day' ? -1 : 2));
  }

  if (dayOfWeek === SUNDAY) {
    date.setDate(date.getDate() + (config.resolveSunday === 'previous-work-day' ? -2 : 1));
  }

  if (config.isHoliday) {
    while (config.isHoliday(date)) {
      date.setDate(date.getDate() - 1);
    }
  }

  return date;
}

export { nextSalaryDay, previousSalaryDay };
//# sourceMappingURL=index2.mjs.map