voc-cli/bin/dic/freedictionary.js

download and play English vocabularies' audio via command line

'use strict';

var _async_ = require('co').wrap;
var fetch = require('node-fetch');
var cheerio = require('cheerio');
var normalize = require('../lib/normalize');
var urlformat = require('url').format;
var HOST = 'http://www.thefreedictionary.com';

// 1. search word
var isWordExist = _async_(regeneratorRuntime.mark(function _callee(word) {
  var url, res, data, list;
  return regeneratorRuntime.wrap(function _callee$(_context) {
    while (1) {
      switch (_context.prev = _context.next) {
        case 0:
          url = HOST + '/_/search/suggest.ashx' + urlformat({
            query: {
              query: word
            }
          });
          _context.next = 3;
          return fetch(url, { timeout: 10 * 1000 });

        case 3:
          res = _context.sent;

          if (!(res.status !== 200)) {
            _context.next = 6;
            break;
          }

          throw new Error('request to ' + url + ' failed, status code = ' + res.status + ' (' + res.statusText + ')');

        case 6:
          _context.next = 8;
          return res.json();

        case 8:
          data = _context.sent;
          list = data[1].map(function (v) {
            return v.toLowerCase();
          });

          // word is exist or not

          return _context.abrupt('return', list.indexOf(word) >= 0);

        case 11:
        case 'end':
          return _context.stop();
      }
    }
  }, _callee, this);
}));

// 2. get audio list
var getAudioList = _async_(regeneratorRuntime.mark(function _callee2(word) {
  var url, res, html, $, set, list, err;
  return regeneratorRuntime.wrap(function _callee2$(_context2) {
    while (1) {
      switch (_context2.prev = _context2.next) {
        case 0:
          url = HOST + '/' + word;
          _context2.next = 3;
          return fetch(url, { timeout: 10 * 1000 });

        case 3:
          res = _context2.sent;

          if (!(res.status !== 200)) {
            _context2.next = 6;
            break;
          }

          throw new Error('request to ' + url + ' failed, status code = ' + res.status + ' (' + res.statusText + ')');

        case 6:
          _context2.next = 8;
          return res.text();

        case 8:
          html = _context2.sent;
          $ = cheerio.load(html);
          set = {};

          $('.snd2').each(function (index, element) {
            var reg = /^en\/US\//i;
            var snd = $(element).attr('data-snd');
            if (reg.test(snd)) {
              var audio = 'http://img2.tfd.com/pron/mp3/' + snd + '.mp3';
              set[audio] = true;
            }
          });

          list = Object.keys(set);

          if (!(list.length === 0)) {
            _context2.next = 17;
            break;
          }

          err = new Error('\'' + word + '\' has no audio from freedictionary');

          err.code = 'ENOENT';
          throw err;

        case 17:

          // show all the audio url
          if (list.length > 1) {
            list.forEach(function (audio, i) {
              console.log(i + 1 + '. ' + audio);
            });
          }

          // return the first audio from list
          return _context2.abrupt('return', list[0]);

        case 19:
        case 'end':
          return _context2.stop();
      }
    }
  }, _callee2, this);
}));

module.exports = _async_(regeneratorRuntime.mark(function _callee3(word) {
  var err;
  return regeneratorRuntime.wrap(function _callee3$(_context3) {
    while (1) {
      switch (_context3.prev = _context3.next) {
        case 0:
          word = normalize(word);

          _context3.next = 3;
          return isWordExist(word);

        case 3:
          if (!_context3.sent) {
            _context3.next = 5;
            break;
          }

          return _context3.abrupt('return', getAudioList(word));

        case 5:
          err = new Error('\'' + word + '\' is not found from freedictionary');

          err.code = 'ENOENT';
          throw err;

        case 8:
        case 'end':
          return _context3.stop();
      }
    }
  }, _callee3, this);
}));