getNumberLeft.js

function isObject(o) {
  return o instanceof Object && o.constructor === Object;
}

function getNumberLeft (man) {
  var sum = 0;
  var keys = Object.keys(man.products);
  keys.forEach(function(key) {
    var keys2 = Object.keys(man.products[key].products);
    keys2.forEach(function(key2, i) {
      if (isObject(man.products[key].products[key2].products)) {
        var keys3 = Object.keys(man.products[key].products[key2].products);
        keys3.forEach(function(key3, j) {
          if (isObject(man.products[key].products[key2].products[key3].products)) {
            var keys4 = Object.keys(man.products[key].products[key2].products[key3].products);
            keys4.forEach(function(key4) {
              if (isObject(man.products[key].products[key2].products[key3].products[key4].products)) {
                var keys5 = Object.keys(man.products[key].products[key2].products[key3].products[key4].products);
                keys5.forEach(function(key5) {
                  if (isObject(man.products[key].products[key2].products[key3].products[key4].products[key5].products)) {
                  }
                  else
                    sum += man.products[key].products[key2].products[key3].products[key4].products[key5].number;
                });
              }
              else
                sum += man.products[key].products[key2].products[key3].products[key4].number;
            });
          }
          else
            sum += man.products[key].products[key2].products[key3].number;
        });
      }
      else
        sum += man.products[key].products[key2].number;
    });
  });
  return sum;
}

module.exports = getNumberLeft;