'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

var UnitNormaliser = function () {
  function UnitNormaliser() {
    _classCallCheck(this, UnitNormaliser);

    this.namesVarients = {};
  }

  _createClass(UnitNormaliser, [{
    key: 'addAlias',
    value: function addAlias(unitName, alias) {
      if (!unitName) throw new Error('absent name!');
      if (!alias) throw new Error('absent alias!');

      if (!this.namesVarients[unitName]) {
        this.namesVarients[unitName] = unitName;
      }
      this.namesVarients[alias.toLowerCase()] = unitName;
    }
  }, {
    key: 'normalise',
    value: function normalise(alias) {
      if (!alias) return;
      return this.namesVarients[alias.toLowerCase()];
    }
  }]);

  return UnitNormaliser;
}();

exports.default = UnitNormaliser;