business-days/lib/business_days.js

Find +/- business days from today or given date

// Generated by CoffeeScript 1.6.3
(function() {
  module.exports = function(dd, y, m, d) {
    var dy, dys, tis, wks;
    tis = (y != null) && (m != null) && (d != null) ? new Date(y, m, d) : new Date();
    wks = Math.floor(dd / 5);
    dys = ((dd % 5) + 5) % 5;
    dy = tis.getDay();
    if (dy === 6 && dys > -1) {
      if (dys === 0) {
        dys -= 2;
        dy += 2;
      }
      ++dys;
      dy -= 6;
    }
    if (dy === 0 && dys < 1) {
      if (dys === 0) {
        dys += 2;
        dy -= 2;
      }
      --dys;
      dy += 6;
    }
    if (dy + dys > 5) {
      dys += 2;
    }
    if (dy + dys < 1) {
      dys -= 2;
    }
    tis.setDate(tis.getDate() + wks * 7 + dys);
    return tis;
  };

}).call(this);