wordpos/src/browser/baseFile.js

wordpos is a set of part-of-speech utilities for Node.js & browser using the WordNet database.

/**
 * browser/baseFile.js
 *
 * Copyright (c) 2012-2019 mooster@42at.com
 * https://github.com/moos/wordpos
 *
 * Released under MIT license
 */

let isTest = window.__mocha;

class BaseFile {

  /**
   * file contents - in browser it's just a string & not a file!
   * @type {Object}
   */
  file = {};

  /**
   * constructor
   * @param {type} type - 'index' or 'data'
   * @param {string} dictPath - path to dict db
   * @param {string} posName - one of 'noun', 'verb', 'adj', 'adv'
   * @param {object} [options] - @see WordPOS options
   */

  constructor(type, dictPath, posName, options) {
    this.type = type;
    this.filePath = `${dictPath}/${type}.${posName}.js`;
    this.posName = posName;
    this.loadError = null;
    this.options = Object.assign({}, options);
  }

  load() {
    if (this.loadError) return Promise.reject(this.loadError);
    if (this.loaded) return this.loaded;

    this.options.debug && console.time('index load ' + this.posName);

    let promise = isTest
      ? Promise.resolve(require(this.filePath))
      : ES6_IMPORT(`${this.filePath}`); // prevent parcel from clobbering dynamic import

    this.options.debug && console.timeEnd('index load ' + this.posName)
    return this.loaded = promise
      .then(exports => {
        this.file = exports.default;
        return this;
      })
      .catch(err => {
        console.error(`Error loading "${this.type}" file ${this.filePath}.`, err);
        this.loadError = err;
        throw err;
      });
  }

  ready(fn, args) {
    return this.load().then(res => fn && fn.apply(this, args) || res);
  }
}

// export default BaseFile;
module.exports = BaseFile;