@numizmatclub/i18n-tool/lib/index.js

A simple internationalization library

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");

var _classCallCheck2 = _interopRequireDefault(require("@babel/runtime/helpers/classCallCheck"));

var _createClass2 = _interopRequireDefault(require("@babel/runtime/helpers/createClass"));

var I18n = function () {
  function I18n(fallbackTranslation) {
    (0, _classCallCheck2["default"])(this, I18n);
    this.translations = {};
    this.fallbackTranslation = fallbackTranslation;
  }

  (0, _createClass2["default"])(I18n, [{
    key: "addLocale",
    value: function addLocale(locale, translation) {
      this.translations[locale] = translation;
      return this;
    }
  }, {
    key: "assignTranslation",
    value: function assignTranslation(locale) {
      this.activeTranslation = this.translations[locale];

      if (!this.activeTranslation) {
        this.activeTranslation = this.translations[this.fallbackTranslation];
      }

      return this;
    }
  }, {
    key: "t",
    value: function t(key) {
      var paths = key.split('.');

      var template = this._findDeep(paths);

      for (var _len = arguments.length, parameters = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
        parameters[_key - 1] = arguments[_key];
      }

      if (parameters) {
        parameters.forEach(function (parameter, index) {
          template = template.replace("{".concat(index, "}"), parameter);
        });
      }

      return template;
    }
  }, {
    key: "_findDeep",
    value: function _findDeep(paths) {
      var current = this.activeTranslation;
      var currentFallback = this.translations[this.fallbackTranslation];

      for (var i = 0; i < paths.length; ++i) {
        if (current[paths[i]] === undefined) {
          current = currentFallback[paths[i]];
          currentFallback = current;

          if (current === undefined) {
            return 'undefined';
          }
        } else {
          current = current[paths[i]];
          currentFallback = currentFallback[paths[i]];
        }
      }

      return current;
    }
  }]);
  return I18n;
}();

module.exports = I18n;