npm-count/lib/fetchBulkQuery.js

a npm/download-counts wrapper

'use strict';

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

var _request = require('request');

var _request2 = _interopRequireDefault(_request);

var _bluebird = require('bluebird');

var _bluebird2 = _interopRequireDefault(_bluebird);

var _immutable = require('immutable');

var _immutable2 = _interopRequireDefault(_immutable);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; } // dependencies


// private
var requestAsync = _bluebird2.default.promisify(_request2.default);
var api = 'https://api.npmjs.org/downloads';

/**
* fetch the stats via https://github.com/npm/download-counts
*
* @module fetchBulkQuery
* @param {(string|array<string>)} names - package names
* @param {object} [options]
* @param {string} [options.type='point'] - api type
* @param {string} [options.period='last-day'] - stats period
* @param {string} [options.requestOptions={json:true,gzip:true}] - pass to `request`
* @returns {promise<object>} always key-value stats (e.g: {name: stats, ...})
* @see https://github.com/npm/download-counts#readme
*/

exports.default = function (names) {
  var options = arguments.length <= 1 || arguments[1] === undefined ? {} : arguments[1];

  var opts = _immutable2.default.fromJS({
    type: 'point',
    period: 'last-day',
    requestOptions: {
      json: true,
      gzip: true
    }
  }).mergeDeep(options).toJS();

  var params = typeof names === 'string' ? [names] : names;
  var url = api + '/' + opts.type + '/' + opts.period + '/' + encodeURIComponent(params.join(','));
  return requestAsync(url, opts.requestOptions).then(function (_ref) {
    var body = _ref.body;

    if (body.error) {
      return {}; // e.g. {"error":"reason description"}
    }

    // transform key-value stats
    // パッケージ名をカンマで区切るとjsonの書式が変わるので、カンマ区切りの時の書式に合わせる
    if (params.length === 1) {
      return _defineProperty({}, body.package, body);
    }

    return body;
  });
};

module.exports = exports['default'];