parse-domain/lib/tries/parseTrie.js

"use strict";

var SEPARATORS = require("./separators");

function parseTrie(input) {
  var map = new Map();
  var parentMaps = [map];
  var domain = "";

  function setDomain(value) {
    if (domain === "") {
      return;
    }

    map.set(domain, value);
    domain = "";
  }

  for (var i = 0; i < input.length; i++) {
    var _char = input.charAt(i);

    switch (_char) {
      case SEPARATORS.SAME:
        {
          setDomain(true);
          continue;
        }

      case SEPARATORS.DOWN:
        {
          var childMap = new Map();
          setDomain(childMap);
          parentMaps.push(map);
          map = childMap;
          continue;
        }

      case SEPARATORS.RESET:
        {
          setDomain(true); // Remove all parent maps but the top most

          parentMaps.length = 1;
          map = parentMaps[0];
          continue;
        }

      case SEPARATORS.UP:
        {
          setDomain(true);
          map = parentMaps.pop();
          continue;
        }
    }

    domain += _char;
  }

  setDomain(true);
  return parentMaps[0];
}

module.exports = parseTrie;