Recursive Bill display

recursiveBillPrint.js

const itemFactory = () => {
  return {
    name: makeid(),
    price: getRandomInt(1, 100),
    items: Math.random() < 0.5 ? Array.from({ length: getRandomInt(1, 4) }, itemFactory) : [],
  }
}

function getRandomInt(min, max) {
  min = Math.ceil(min);
  max = Math.floor(max);
  return Math.floor(Math.random() * (max - min) + min); //The maximum is exclusive and the minimum is inclusive
}

function makeid() {
  var length = 5;
  var result = '';
  var characters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
  var charactersLength = characters.length;
  for (var i = 0; i < length; i++) {
    result += characters.charAt(Math.floor(Math.random() *
      charactersLength));
  }
  return result;
}

const order = itemFactory();
console.log("🚀 ~ file: main.js ~ line 27 ~ order", order, Array.from({ length: getRandomInt(1, 4) }, itemFactory))

const getTotal = (root, sum = 0) => {
  if (!root) return sum;
  sum += root.price;
  if (!root.items) return sum;
  return root.items.reduce((acc, item) => acc += getTotal(item, acc), sum);
}
console.log("🚀 ~ file: main.js ~ line 40 ~ getTotal ~ getTotal", getTotal(order))

const logItem = (root, indent = 0, str = '') => {
  if (!root?.name || !root.price) return;
  indent += 1;
  str += Array.from({ length: indent }).join('\t') + `${root.name}:${root.price}\n`;
  if (!root.items) return str;
  root.items.forEach(item => str += logItem(item, indent, str));
  return str;
}
console.log("🚀 ~ file: main.js ~ line 44 ~ logItem ~ logItem", logItem(order))