youtube-playlist-sorter/lib/playlist.js

Sorts ↕️ a public playlist based on it's popularity 🔥

'use strict';

var getSortedPlaylist = function () {
  var _ref = _asyncToGenerator( /*#__PURE__*/regeneratorRuntime.mark(function _callee(playListId) {
    var videoIds, videos;
    return regeneratorRuntime.wrap(function _callee$(_context) {
      while (1) {
        switch (_context.prev = _context.next) {
          case 0:
            _context.next = 2;
            return api.getVideoIdsFromPlayList(playListId);

          case 2:
            videoIds = _context.sent;
            _context.next = 5;
            return Promise.all(videoIds.map(api.getVideoDetails));

          case 5:
            videos = _context.sent;
            return _context.abrupt('return', videos.filter(function (v) {
              return !!v;
            }).sort(comparator));

          case 7:
          case 'end':
            return _context.stop();
        }
      }
    }, _callee, this);
  }));

  return function getSortedPlaylist(_x) {
    return _ref.apply(this, arguments);
  };
}();

function _asyncToGenerator(fn) { return function () { var gen = fn.apply(this, arguments); return new Promise(function (resolve, reject) { function step(key, arg) { try { var info = gen[key](arg); var value = info.value; } catch (error) { reject(error); return; } if (info.done) { resolve(value); } else { return Promise.resolve(value).then(function (value) { step("next", value); }, function (err) { step("throw", err); }); } } return step("next"); }); }; }

var url = require('url');
var api = require('./api');

/**
 * Sorts descending based on viewCount / popularity
 */
function comparator(a, b) {
  return b.statistics.viewCount - a.statistics.viewCount;
}

function getPlaylistId(playlistUrl) {
  var parsedUrl = url.parse(playlistUrl, true);
  if (!parsedUrl.host || !parsedUrl.host.includes('youtube.com')) return undefined;
  return parsedUrl.query.list;
}

module.exports = { getSortedPlaylist, getPlaylistId };