'use strict';

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

/**
 * Informs if DNT (Do Not Track) is enabled (FF returns 'unspecified' when disabled)
 *
 * Note: FF does not support JS retrieving of per-site DNT disabling (shield icon),
 * unless by checking for a honeypot. See https://stackoverflow.com/a/35070265/462849
 *
 * @return {boolean}
 */
var hasDntEnabled = function hasDntEnabled() {
  var dnt = navigator.doNotTrack || window.doNotTrack;
  return Boolean(dnt && !['0', 'unspecified'].includes(dnt));
};
/**
 * Checks if an object's type is undefined
 *
 * @param {*} obj - The object reference to be checked
 * @return {boolean}
 */


var isUndefined = function isUndefined(obj) {
  return typeof obj === 'undefined';
};
/**
 * Checks if an object exists and is empty
 *
 * @param {Object} obj - The object reference to be checked
 * @return {boolean}
 */


var isEmptyObject = function isEmptyObject(obj) {
  return Object.keys(obj).length === 0;
};
/**
 * Checks if a value is numeric
 *
 * @param {Object} value - The value to be checked
 * @return {boolean}
 */


var isNumeric = function isNumeric(value) {
  return !Number.isNaN(parseFloat(value)) && !Number.isNaN(value - 0);
};
/**
 * Helper to pluralize words in error messages
 *
 * @param {string} word - A string that will be suffixed with an 's' if collection has more than 1 member
 * @param {Array} arr - The group of items
 * @return {string} Either the word sufixed with a simple plural, 's', or the provided original
 */


var pluralize = function pluralize(word, arr) {
  return arr.length > 1 ? "".concat(word, "s") : word;
};
/**
 * Computes a flag based on given probability thresholds and a sampling rate
 *
 * @param {TrackingApiServices} services An HTML element to inspect
 * @param {Number|Boolean} samplingRate A number from 0 to 1 (inclusive), or a boolean
 * @return {TrackingApiServices}
 */


var sampleServices = function sampleServices(services, samplingRate) {
  return Object.keys(services).reduce(function (acc, cur) {
    var serviceThreshold = services[cur];
    acc[cur] = serviceThreshold >= samplingRate;
    return acc;
  }, {});
};
/**
 * Provides a basic polyfill for Promise.allSettled
 *
 * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise/allSettled
 * @see https://caniuse.com/#feat=mdn-javascript_builtins_promise_allsettled
 * @param {Promise[]} arr An array of Promises
 * @return {Promise<Array<{status: string, value: any}|{status: string, reason: Error}>>}
 */


var allSettledPolyfill = function allSettledPolyfill(arr) {
  return Promise.all(arr.map(function (promise) {
    return promise.then(function (value) {
      return {
        status: 'fulfilled',
        value: value
      };
    }).catch(function (error) {
      return {
        status: 'rejected',
        reason: error
      };
    });
  }));
};

exports.allSettledPolyfill = allSettledPolyfill;
exports.hasDntEnabled = hasDntEnabled;
exports.isEmptyObject = isEmptyObject;
exports.isNumeric = isNumeric;
exports.isUndefined = isUndefined;
exports.pluralize = pluralize;
exports.sampleServices = sampleServices;
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