/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * @preserved
 */

(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
  typeof define === 'function' && define.amd ? define(['exports'], factory) :
  (global = typeof globalThis !== 'undefined' ? globalThis : global || self, factory(global.userale = {}));
})(this, (function (exports) { 'use strict';

  function _typeof(obj) {
    "@babel/helpers - typeof";

    return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (obj) {
      return typeof obj;
    } : function (obj) {
      return obj && "function" == typeof Symbol && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
    }, _typeof(obj);
  }

  var version$1 = "2.3.0";

  /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You under the Apache License, Version 2.0
   * (the 'License'); you may not use this file except in compliance with
   * the License.  You may obtain a copy of the License at
   * 
   *   http://www.apache.org/licenses/LICENSE-2.0
   * 
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an 'AS IS' BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  var sessionId = null;
  /**
   * Extracts the initial configuration settings from the
   * currently executing script tag.
   * @return {Object} The extracted configuration object
   */

  function getInitialSettings() {
    var settings = {};

    if (sessionId === null) {
      sessionId = getSessionId('userAleSessionId', 'session_' + String(Date.now()));
    }

    var script = document.currentScript || function () {
      var scripts = document.getElementsByTagName('script');
      return scripts[scripts.length - 1];
    }();

    var get = script ? script.getAttribute.bind(script) : function () {
      return null;
    };
    settings.autostart = get('data-autostart') === 'false' ? false : true;
    settings.url = get('data-url') || 'http://localhost:8000';
    settings.transmitInterval = +get('data-interval') || 5000;
    settings.logCountThreshold = +get('data-threshold') || 5;
    settings.userId = get('data-user') || null;
    settings.version = get('data-version') || null;
    settings.logDetails = get('data-log-details') === 'true' ? true : false;
    settings.resolution = +get('data-resolution') || 500;
    settings.toolName = get('data-tool') || null;
    settings.userFromParams = get('data-user-from-params') || null;
    settings.time = timeStampScale(document.createEvent('CustomEvent'));
    settings.sessionID = get('data-session') || sessionId;
    settings.authHeader = get('data-auth') || null;
    settings.custIndex = get('data-index') || null;
    return settings;
  }
  /**
   * defines sessionId, stores it in sessionStorage, checks to see if there is a sessionId in
   * storage when script is started. This prevents events like 'submit', which refresh page data
   * from refreshing the current user session
   *
   */

  function getSessionId(sessionKey, value) {
    if (window.sessionStorage.getItem(sessionKey) === null) {
      window.sessionStorage.setItem(sessionKey, JSON.stringify(value));
      return value;
    }

    return JSON.parse(window.sessionStorage.getItem(sessionKey));
  }
  /**
   * Creates a function to normalize the timestamp of the provided event.
   * @param  {Object} e An event containing a timeStamp property.
   * @return {timeStampScale~tsScaler}   The timestamp normalizing function.
   */

  function timeStampScale(e) {
    var tsScaler;

    if (e.timeStamp && e.timeStamp > 0) {
      var delta = Date.now() - e.timeStamp;
      /**
       * Returns a timestamp depending on various browser quirks.
       * @param  {?Number} ts A timestamp to use for normalization.
       * @return {Number} A normalized timestamp.
       */

      if (delta < 0) {
        tsScaler = function tsScaler() {
          return e.timeStamp / 1000;
        };
      } else if (delta > e.timeStamp) {
        var navStart = performance.timing.navigationStart;

        tsScaler = function tsScaler(ts) {
          return ts + navStart;
        };
      } else {
        tsScaler = function tsScaler(ts) {
          return ts;
        };
      }
    } else {
      tsScaler = function tsScaler() {
        return Date.now();
      };
    }

    return tsScaler;
  }

  /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License.  You may obtain a copy of the License at
   * 
   *   http://www.apache.org/licenses/LICENSE-2.0
   * 
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */

  /**
   * Shallow merges the first argument with the second.
   * Retrieves/updates the userid if userFromParams is provided.
   * @param  {Object} config    Current configuration object to be merged into.
   * @param  {Object} newConfig Configuration object to merge into the current config.
   */
  function configure(config, newConfig) {
    var configAutostart = config['autostart'];
    var newConfigAutostart = newConfig['autostart'];
    Object.keys(newConfig).forEach(function (option) {
      if (option === 'userFromParams') {
        var userId = getUserIdFromParams(newConfig[option]);

        if (userId) {
          config.userId = userId;
        }
      }

      config[option] = newConfig[option];
    });

    if (configAutostart === false || newConfigAutostart === false) {
      config['autostart'] = false;
    }
  }
  /**
   * Attempts to extract the userid from the query parameters of the URL.
   * @param  {string} param The name of the query parameter containing the userid.
   * @return {string|null}       The extracted/decoded userid, or null if none is found.
   */

  function getUserIdFromParams(param) {
    var userField = param;
    var regex = new RegExp('[?&]' + userField + '(=([^&#]*)|&|#|$)');
    var results = window.location.href.match(regex);

    if (results && results[2]) {
      return decodeURIComponent(results[2].replace(/\+/g, ' '));
    } else {
      return null;
    }
  }

  var __spreadArray = (undefined && undefined.__spreadArray) || function (to, from, pack) {
      if (pack || arguments.length === 2) for (var i = 0, l = from.length, ar; i < l; i++) {
          if (ar || !(i in from)) {
              if (!ar) ar = Array.prototype.slice.call(from, 0, i);
              ar[i] = from[i];
          }
      }
      return to.concat(ar || Array.prototype.slice.call(from));
  };
  var BrowserInfo = /** @class */ (function () {
      function BrowserInfo(name, version, os) {
          this.name = name;
          this.version = version;
          this.os = os;
          this.type = 'browser';
      }
      return BrowserInfo;
  }());
  var NodeInfo = /** @class */ (function () {
      function NodeInfo(version) {
          this.version = version;
          this.type = 'node';
          this.name = 'node';
          this.os = process.platform;
      }
      return NodeInfo;
  }());
  var SearchBotDeviceInfo = /** @class */ (function () {
      function SearchBotDeviceInfo(name, version, os, bot) {
          this.name = name;
          this.version = version;
          this.os = os;
          this.bot = bot;
          this.type = 'bot-device';
      }
      return SearchBotDeviceInfo;
  }());
  var BotInfo = /** @class */ (function () {
      function BotInfo() {
          this.type = 'bot';
          this.bot = true; // NOTE: deprecated test name instead
          this.name = 'bot';
          this.version = null;
          this.os = null;
      }
      return BotInfo;
  }());
  var ReactNativeInfo = /** @class */ (function () {
      function ReactNativeInfo() {
          this.type = 'react-native';
          this.name = 'react-native';
          this.version = null;
          this.os = null;
      }
      return ReactNativeInfo;
  }());
  // tslint:disable-next-line:max-line-length
  var SEARCHBOX_UA_REGEX = /alexa|bot|crawl(er|ing)|facebookexternalhit|feedburner|google web preview|nagios|postrank|pingdom|slurp|spider|yahoo!|yandex/;
  var SEARCHBOT_OS_REGEX = /(nuhk|curl|Googlebot|Yammybot|Openbot|Slurp|MSNBot|Ask\ Jeeves\/Teoma|ia_archiver)/;
  var REQUIRED_VERSION_PARTS = 3;
  var userAgentRules = [
      ['aol', /AOLShield\/([0-9\._]+)/],
      ['edge', /Edge\/([0-9\._]+)/],
      ['edge-ios', /EdgiOS\/([0-9\._]+)/],
      ['yandexbrowser', /YaBrowser\/([0-9\._]+)/],
      ['kakaotalk', /KAKAOTALK\s([0-9\.]+)/],
      ['samsung', /SamsungBrowser\/([0-9\.]+)/],
      ['silk', /\bSilk\/([0-9._-]+)\b/],
      ['miui', /MiuiBrowser\/([0-9\.]+)$/],
      ['beaker', /BeakerBrowser\/([0-9\.]+)/],
      ['edge-chromium', /EdgA?\/([0-9\.]+)/],
      [
          'chromium-webview',
          /(?!Chrom.*OPR)wv\).*Chrom(?:e|ium)\/([0-9\.]+)(:?\s|$)/,
      ],
      ['chrome', /(?!Chrom.*OPR)Chrom(?:e|ium)\/([0-9\.]+)(:?\s|$)/],
      ['phantomjs', /PhantomJS\/([0-9\.]+)(:?\s|$)/],
      ['crios', /CriOS\/([0-9\.]+)(:?\s|$)/],
      ['firefox', /Firefox\/([0-9\.]+)(?:\s|$)/],
      ['fxios', /FxiOS\/([0-9\.]+)/],
      ['opera-mini', /Opera Mini.*Version\/([0-9\.]+)/],
      ['opera', /Opera\/([0-9\.]+)(?:\s|$)/],
      ['opera', /OPR\/([0-9\.]+)(:?\s|$)/],
      ['pie', /^Microsoft Pocket Internet Explorer\/(\d+\.\d+)$/],
      ['pie', /^Mozilla\/\d\.\d+\s\(compatible;\s(?:MSP?IE|MSInternet Explorer) (\d+\.\d+);.*Windows CE.*\)$/],
      ['netfront', /^Mozilla\/\d\.\d+.*NetFront\/(\d.\d)/],
      ['ie', /Trident\/7\.0.*rv\:([0-9\.]+).*\).*Gecko$/],
      ['ie', /MSIE\s([0-9\.]+);.*Trident\/[4-7].0/],
      ['ie', /MSIE\s(7\.0)/],
      ['bb10', /BB10;\sTouch.*Version\/([0-9\.]+)/],
      ['android', /Android\s([0-9\.]+)/],
      ['ios', /Version\/([0-9\._]+).*Mobile.*Safari.*/],
      ['safari', /Version\/([0-9\._]+).*Safari/],
      ['facebook', /FB[AS]V\/([0-9\.]+)/],
      ['instagram', /Instagram\s([0-9\.]+)/],
      ['ios-webview', /AppleWebKit\/([0-9\.]+).*Mobile/],
      ['ios-webview', /AppleWebKit\/([0-9\.]+).*Gecko\)$/],
      ['curl', /^curl\/([0-9\.]+)$/],
      ['searchbot', SEARCHBOX_UA_REGEX],
  ];
  var operatingSystemRules = [
      ['iOS', /iP(hone|od|ad)/],
      ['Android OS', /Android/],
      ['BlackBerry OS', /BlackBerry|BB10/],
      ['Windows Mobile', /IEMobile/],
      ['Amazon OS', /Kindle/],
      ['Windows 3.11', /Win16/],
      ['Windows 95', /(Windows 95)|(Win95)|(Windows_95)/],
      ['Windows 98', /(Windows 98)|(Win98)/],
      ['Windows 2000', /(Windows NT 5.0)|(Windows 2000)/],
      ['Windows XP', /(Windows NT 5.1)|(Windows XP)/],
      ['Windows Server 2003', /(Windows NT 5.2)/],
      ['Windows Vista', /(Windows NT 6.0)/],
      ['Windows 7', /(Windows NT 6.1)/],
      ['Windows 8', /(Windows NT 6.2)/],
      ['Windows 8.1', /(Windows NT 6.3)/],
      ['Windows 10', /(Windows NT 10.0)/],
      ['Windows ME', /Windows ME/],
      ['Windows CE', /Windows CE|WinCE|Microsoft Pocket Internet Explorer/],
      ['Open BSD', /OpenBSD/],
      ['Sun OS', /SunOS/],
      ['Chrome OS', /CrOS/],
      ['Linux', /(Linux)|(X11)/],
      ['Mac OS', /(Mac_PowerPC)|(Macintosh)/],
      ['QNX', /QNX/],
      ['BeOS', /BeOS/],
      ['OS/2', /OS\/2/],
  ];
  function detect(userAgent) {
      if (!!userAgent) {
          return parseUserAgent(userAgent);
      }
      if (typeof document === 'undefined' &&
          typeof navigator !== 'undefined' &&
          navigator.product === 'ReactNative') {
          return new ReactNativeInfo();
      }
      if (typeof navigator !== 'undefined') {
          return parseUserAgent(navigator.userAgent);
      }
      return getNodeVersion();
  }
  function matchUserAgent(ua) {
      // opted for using reduce here rather than Array#first with a regex.test call
      // this is primarily because using the reduce we only perform the regex
      // execution once rather than once for the test and for the exec again below
      // probably something that needs to be benchmarked though
      return (ua !== '' &&
          userAgentRules.reduce(function (matched, _a) {
              var browser = _a[0], regex = _a[1];
              if (matched) {
                  return matched;
              }
              var uaMatch = regex.exec(ua);
              return !!uaMatch && [browser, uaMatch];
          }, false));
  }
  function parseUserAgent(ua) {
      var matchedRule = matchUserAgent(ua);
      if (!matchedRule) {
          return null;
      }
      var name = matchedRule[0], match = matchedRule[1];
      if (name === 'searchbot') {
          return new BotInfo();
      }
      // Do not use RegExp for split operation as some browser do not support it (See: http://blog.stevenlevithan.com/archives/cross-browser-split)
      var versionParts = match[1] && match[1].split('.').join('_').split('_').slice(0, 3);
      if (versionParts) {
          if (versionParts.length < REQUIRED_VERSION_PARTS) {
              versionParts = __spreadArray(__spreadArray([], versionParts, true), createVersionParts(REQUIRED_VERSION_PARTS - versionParts.length), true);
          }
      }
      else {
          versionParts = [];
      }
      var version = versionParts.join('.');
      var os = detectOS(ua);
      var searchBotMatch = SEARCHBOT_OS_REGEX.exec(ua);
      if (searchBotMatch && searchBotMatch[1]) {
          return new SearchBotDeviceInfo(name, version, os, searchBotMatch[1]);
      }
      return new BrowserInfo(name, version, os);
  }
  function detectOS(ua) {
      for (var ii = 0, count = operatingSystemRules.length; ii < count; ii++) {
          var _a = operatingSystemRules[ii], os = _a[0], regex = _a[1];
          var match = regex.exec(ua);
          if (match) {
              return os;
          }
      }
      return null;
  }
  function getNodeVersion() {
      var isNode = typeof process !== 'undefined' && process.version;
      return isNode ? new NodeInfo(process.version.slice(1)) : null;
  }
  function createVersionParts(count) {
      var output = [];
      for (var ii = 0; ii < count; ii++) {
          output.push('0');
      }
      return output;
  }

  /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License.  You may obtain a copy of the License at
   * 
   *   http://www.apache.org/licenses/LICENSE-2.0
   * 
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  var browser = detect();
  var logs$1;
  var config$1; // Interval Logging Globals

  var intervalID;
  var intervalType;
  var intervalPath;
  var intervalTimer;
  var intervalCounter;
  var intervalLog;
  var filterHandler = null;
  var mapHandler = null;
  /**
   * Assigns a handler to filter logs out of the queue.
   * @param  {Function} callback The handler to invoke when logging.
   */

  function setLogFilter(callback) {
    filterHandler = callback;
  }
  /**
   * Assigns a handler to transform logs from their default structure.
   * @param  {Function} callback The handler to invoke when logging.
   */

  function setLogMapper(callback) {
    mapHandler = callback;
  }
  /**
   * Assigns the config and log container to be used by the logging functions.
   * @param  {Array} newLogs   Log container.
   * @param  {Object} newConfig Configuration to use while logging.
   */

  function initPackager(newLogs, newConfig) {
    logs$1 = newLogs;
    config$1 = newConfig;
    filterHandler = null;
    mapHandler = null;
    intervalID = null;
    intervalType = null;
    intervalPath = null;
    intervalTimer = null;
    intervalCounter = 0;
    intervalLog = null;
  }
  /**
   * Transforms the provided HTML event into a log and appends it to the log queue.
   * @param  {Object} e         The event to be logged.
   * @param  {Function} detailFcn The function to extract additional log parameters from the event.
   * @return {boolean}           Whether the event was logged.
   */

  function packageLog(e, detailFcn) {
    if (!config$1.on) {
      return false;
    }

    var details = null;

    if (detailFcn) {
      details = detailFcn(e);
    }

    var timeFields = extractTimeFields(e.timeStamp && e.timeStamp > 0 ? config$1.time(e.timeStamp) : Date.now());
    var log = {
      'target': getSelector(e.target),
      'path': buildPath(e),
      'pageUrl': window.location.href,
      'pageTitle': document.title,
      'pageReferrer': document.referrer,
      'browser': detectBrowser(),
      'clientTime': timeFields.milli,
      'microTime': timeFields.micro,
      'location': getLocation(e),
      'scrnRes': getSreenRes(),
      'type': e.type,
      'logType': 'raw',
      'userAction': true,
      'details': details,
      'userId': config$1.userId,
      'toolVersion': config$1.version,
      'toolName': config$1.toolName,
      'useraleVersion': config$1.useraleVersion,
      'sessionID': config$1.sessionID
    };

    if (typeof filterHandler === 'function' && !filterHandler(log)) {
      return false;
    }

    if (typeof mapHandler === 'function') {
      log = mapHandler(log, e);
    }

    logs$1.push(log);
    return true;
  }
  /**
   * Packages the provided customLog to include standard meta data and appends it to the log queue.
   * @param  {Object} customLog        The behavior to be logged.
   * @param  {Function} detailFcn     The function to extract additional log parameters from the event.
   * @param  {boolean} userAction     Indicates user behavior (true) or system behavior (false)
   * @return {boolean}           Whether the event was logged.
   */

  function packageCustomLog(customLog, detailFcn, userAction) {
    if (!config$1.on) {
      return false;
    }

    var details = null;

    if (detailFcn) {
      details = detailFcn();
    }

    var metaData = {
      'pageUrl': window.location.href,
      'pageTitle': document.title,
      'pageReferrer': document.referrer,
      'browser': detectBrowser(),
      'clientTime': Date.now(),
      'scrnRes': getSreenRes(),
      'logType': 'custom',
      'userAction': userAction,
      'details': details,
      'userId': config$1.userId,
      'toolVersion': config$1.version,
      'toolName': config$1.toolName,
      'useraleVersion': config$1.useraleVersion,
      'sessionID': config$1.sessionID
    };
    var log = Object.assign(metaData, customLog);

    if (typeof filterHandler === 'function' && !filterHandler(log)) {
      return false;
    }

    if (typeof mapHandler === 'function') {
      log = mapHandler(log);
    }

    logs$1.push(log);
    return true;
  }
  /**
   * Extract the millisecond and microsecond portions of a timestamp.
   * @param  {Number} timeStamp The timestamp to split into millisecond and microsecond fields.
   * @return {Object}           An object containing the millisecond
   *                            and microsecond portions of the timestamp.
   */

  function extractTimeFields(timeStamp) {
    return {
      milli: Math.floor(timeStamp),
      micro: Number((timeStamp % 1).toFixed(3))
    };
  }
  /**
   * Track intervals and gather details about it.
   * @param {Object} e
   * @return boolean
   */

  function packageIntervalLog(e) {
    var target = getSelector(e.target);
    var path = buildPath(e);
    var type = e.type;
    var timestamp = Math.floor(e.timeStamp && e.timeStamp > 0 ? config$1.time(e.timeStamp) : Date.now()); // Init - this should only happen once on initialization

    if (intervalID == null) {
      intervalID = target;
      intervalType = type;
      intervalPath = path;
      intervalTimer = timestamp;
      intervalCounter = 0;
    }

    if (intervalID !== target || intervalType !== type) {
      // When to create log? On transition end
      // @todo Possible for intervalLog to not be pushed in the event the interval never ends...
      intervalLog = {
        'target': intervalID,
        'path': intervalPath,
        'pageUrl': window.location.href,
        'pageTitle': document.title,
        'pageReferrer': document.referrer,
        'browser': detectBrowser(),
        'count': intervalCounter,
        'duration': timestamp - intervalTimer,
        // microseconds
        'startTime': intervalTimer,
        'endTime': timestamp,
        'type': intervalType,
        'logType': 'interval',
        'targetChange': intervalID !== target,
        'typeChange': intervalType !== type,
        'userAction': false,
        'userId': config$1.userId,
        'toolVersion': config$1.version,
        'toolName': config$1.toolName,
        'useraleVersion': config$1.useraleVersion,
        'sessionID': config$1.sessionID
      };

      if (typeof filterHandler === 'function' && !filterHandler(intervalLog)) {
        return false;
      }

      if (typeof mapHandler === 'function') {
        intervalLog = mapHandler(intervalLog, e);
      }

      logs$1.push(intervalLog); // Reset

      intervalID = target;
      intervalType = type;
      intervalPath = path;
      intervalTimer = timestamp;
      intervalCounter = 0;
    } // Interval is still occuring, just update counter


    if (intervalID == target && intervalType == type) {
      intervalCounter = intervalCounter + 1;
    }

    return true;
  }
  /**
   * Extracts coordinate information from the event
   * depending on a few browser quirks.
   * @param  {Object} e The event to extract coordinate information from.
   * @return {Object}   An object containing nullable x and y coordinates for the event.
   */

  function getLocation(e) {
    if (e.pageX != null) {
      return {
        'x': e.pageX,
        'y': e.pageY
      };
    } else if (e.clientX != null) {
      return {
        'x': document.documentElement.scrollLeft + e.clientX,
        'y': document.documentElement.scrollTop + e.clientY
      };
    } else {
      return {
        'x': null,
        'y': null
      };
    }
  }
  /**
   * Extracts innerWidth and innerHeight to provide estimates of screen resolution
   * @return {Object} An object containing the innerWidth and InnerHeight
   */

  function getSreenRes() {
    return {
      'width': window.innerWidth,
      'height': window.innerHeight
    };
  }
  /**
   * Builds a string CSS selector from the provided element
   * @param  {HTMLElement} ele The element from which the selector is built.
   * @return {string}     The CSS selector for the element, or Unknown if it can't be determined.
   */

  function getSelector(ele) {
    if (ele.localName) {
      return ele.localName + (ele.id ? '#' + ele.id : '') + (ele.className ? '.' + ele.className : '');
    } else if (ele.nodeName) {
      return ele.nodeName + (ele.id ? '#' + ele.id : '') + (ele.className ? '.' + ele.className : '');
    } else if (ele && ele.document && ele.location && ele.alert && ele.setInterval) {
      return "Window";
    } else {
      return "Unknown";
    }
  }
  /**
   * Builds an array of elements from the provided event target, to the root element.
   * @param  {Object} e Event from which the path should be built.
   * @return {HTMLElement[]}   Array of elements, starting at the event target, ending at the root element.
   */

  function buildPath(e) {
    var path = [];

    if (e.path) {
      path = e.path;
    } else {
      var ele = e.target;

      while (ele) {
        path.push(ele);
        ele = ele.parentElement;
      }
    }

    return selectorizePath(path);
  }
  /**
   * Builds a CSS selector path from the provided list of elements.
   * @param  {HTMLElement[]} path Array of HTMLElements from which the path should be built.
   * @return {string[]}      Array of string CSS selectors.
   */

  function selectorizePath(path) {
    var i = 0;
    var pathEle;
    var pathSelectors = [];

    while (pathEle = path[i]) {
      pathSelectors.push(getSelector(pathEle));
      ++i;
    }

    return pathSelectors;
  }
  function detectBrowser() {
    return {
      'browser': browser ? browser.name : '',
      'version': browser ? browser.version : ''
    };
  }

  /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License.  You may obtain a copy of the License at
   * 
   *   http://www.apache.org/licenses/LICENSE-2.0
   * 
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  var events;
  var bufferBools;
  var bufferedEvents; //@todo: Investigate drag events and their behavior

  var intervalEvents = ['click', 'focus', 'blur', 'input', 'change', 'mouseover', 'submit'];
  var refreshEvents;
  var windowEvents = ['load', 'blur', 'focus'];
  /**
   * Maps an event to an object containing useful information.
   * @param  {Object} e Event to extract data from
   */

  function extractMouseEvent(e) {
    return {
      'clicks': e.detail,
      'ctrl': e.ctrlKey,
      'alt': e.altKey,
      'shift': e.shiftKey,
      'meta': e.metaKey //    'text' : e.target.innerHTML

    };
  }
  /**
   * Defines the way information is extracted from various events.
   * Also defines which events we will listen to.
   * @param  {Object} config Configuration object to read from.
   */

  function defineDetails(config) {
    // Events list
    // Keys are event types
    // Values are functions that return details object if applicable
    events = {
      'click': extractMouseEvent,
      'dblclick': extractMouseEvent,
      'mousedown': extractMouseEvent,
      'mouseup': extractMouseEvent,
      'focus': null,
      'blur': null,
      'input': config.logDetails ? function (e) {
        return {
          'value': e.target.value
        };
      } : null,
      'change': config.logDetails ? function (e) {
        return {
          'value': e.target.value
        };
      } : null,
      'dragstart': null,
      'dragend': null,
      'drag': null,
      'drop': null,
      'keydown': config.logDetails ? function (e) {
        return {
          'key': e.keyCode,
          'ctrl': e.ctrlKey,
          'alt': e.altKey,
          'shift': e.shiftKey,
          'meta': e.metaKey
        };
      } : null,
      'mouseover': null
    };
    bufferBools = {};
    bufferedEvents = {
      'wheel': function wheel(e) {
        return {
          'x': e.deltaX,
          'y': e.deltaY,
          'z': e.deltaZ
        };
      },
      'scroll': function scroll() {
        return {
          'x': window.scrollX,
          'y': window.scrollY
        };
      },
      'resize': function resize() {
        return {
          'width': window.outerWidth,
          'height': window.outerHeight
        };
      }
    };
    refreshEvents = {
      'submit': null
    };
  }
  /**
   * Defines the way information is extracted from various events.
   * Also defines which events we will listen to.
   * @param  {Object} options UserALE.js Configuration object to read from.
   * @param   {string}    type of html event (e.g., 'click', 'mouseover', etc.), such as passed to addEventListener methods.
   */

  function defineCustomDetails(options, type) {
    // Events list
    // Keys are event types
    // Values are functions that return details object if applicable
    var eventType = {
      'click': extractMouseEvent,
      'dblclick': extractMouseEvent,
      'mousedown': extractMouseEvent,
      'mouseup': extractMouseEvent,
      'focus': null,
      'blur': null,
      'input': options.logDetails ? function (e) {
        return {
          'value': e.target.value
        };
      } : null,
      'change': options.logDetails ? function (e) {
        return {
          'value': e.target.value
        };
      } : null,
      'dragstart': null,
      'dragend': null,
      'drag': null,
      'drop': null,
      'keydown': options.logDetails ? function (e) {
        return {
          'key': e.keyCode,
          'ctrl': e.ctrlKey,
          'alt': e.altKey,
          'shift': e.shiftKey,
          'meta': e.metaKey
        };
      } : null,
      'mouseover': null,
      'wheel': function wheel(e) {
        return {
          'x': e.deltaX,
          'y': e.deltaY,
          'z': e.deltaZ
        };
      },
      'scroll': function scroll() {
        return {
          'x': window.scrollX,
          'y': window.scrollY
        };
      },
      'resize': function resize() {
        return {
          'width': window.outerWidth,
          'height': window.outerHeight
        };
      },
      'submit': null
    };
    return eventType[type];
  }
  /**
   * Hooks the event handlers for each event type of interest.
   * @param  {Object} config Configuration object to use.
   * @return {boolean}        Whether the operation succeeded
   */

  function attachHandlers(config) {
    defineDetails(config);
    Object.keys(events).forEach(function (ev) {
      document.addEventListener(ev, function (e) {
        packageLog(e, events[ev]);
      }, true);
    });
    intervalEvents.forEach(function (ev) {
      document.addEventListener(ev, function (e) {
        packageIntervalLog(e);
      }, true);
    });
    Object.keys(bufferedEvents).forEach(function (ev) {
      bufferBools[ev] = true;
      window.addEventListener(ev, function (e) {
        if (bufferBools[ev]) {
          bufferBools[ev] = false;
          packageLog(e, bufferedEvents[ev]);
          setTimeout(function () {
            bufferBools[ev] = true;
          }, config.resolution);
        }
      }, true);
    });
    Object.keys(refreshEvents).forEach(function (ev) {
      document.addEventListener(ev, function (e) {
        packageLog(e, events[ev]);
      }, true);
    });
    windowEvents.forEach(function (ev) {
      window.addEventListener(ev, function (e) {
        packageLog(e, function () {
          return {
            'window': true
          };
        });
      }, true);
    });
    return true;
  }

  /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License.  You may obtain a copy of the License at
   * 
   *   http://www.apache.org/licenses/LICENSE-2.0
   * 
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  var sendIntervalId = null;
  /**
   * Initializes the log queue processors.
   * @param  {Array} logs   Array of logs to append to.
   * @param  {Object} config Configuration object to use when logging.
   */

  function initSender(logs, config) {
    if (sendIntervalId !== null) {
      clearInterval(sendIntervalId);
    }

    sendIntervalId = sendOnInterval(logs, config);
    sendOnClose(logs, config);
  }
  /**
   * Checks the provided log array on an interval, flushing the logs
   * if the queue has reached the threshold specified by the provided config.
   * @param  {Array} logs   Array of logs to read from.
   * @param  {Object} config Configuration object to be read from.
   * @return {Number}        The newly created interval id.
   */

  function sendOnInterval(logs, config) {
    return setInterval(function () {
      if (!config.on) {
        return;
      }

      if (logs.length >= config.logCountThreshold) {
        sendLogs(logs.slice(0), config, 0); // Send a copy

        logs.splice(0); // Clear array reference (no reassignment)
      }
    }, config.transmitInterval);
  }
  /**
   * Attempts to flush the remaining logs when the window is closed.
   * @param  {Array} logs   Array of logs to be flushed.
   * @param  {Object} config Configuration object to be read from.
   */

  function sendOnClose(logs, config) {
    window.addEventListener('pagehide', function () {
      if (logs.length > 0) {
        navigator.sendBeacon(config.url, JSON.stringify(logs));
        logs.splice(0); // clear log queue
      }
    });
  }
  /**
   * Sends the provided array of logs to the specified url,
   * retrying the request up to the specified number of retries.
   * @param  {Array} logs    Array of logs to send.
   * @param  {string} config     configuration parameters (e.g., to extract URL from & send the POST request to).
   * @param  {Number} retries Maximum number of attempts to send the logs.
   */
  // @todo expose config object to sendLogs replate url with config.url

  function sendLogs(logs, config, retries) {
    var req = new XMLHttpRequest(); // @todo setRequestHeader for Auth

    var data = JSON.stringify(logs);
    req.open('POST', config.url);

    if (config.authHeader) {
      req.setRequestHeader('Authorization', config.authHeader);
    }

    req.setRequestHeader('Content-type', 'application/json;charset=UTF-8');

    req.onreadystatechange = function () {
      if (req.readyState === 4 && req.status !== 200) {
        if (retries > 0) {
          sendLogs(logs, config, retries--);
        }
      }
    };

    req.send(data);
  }

  var config = {};
  var logs = [];
  var startLoadTimestamp = Date.now();
  var endLoadTimestamp;

  window.onload = function () {
    endLoadTimestamp = Date.now();
  };

  exports.started = false;

  config.on = false;
  config.useraleVersion = version$1;
  configure(config, getInitialSettings());
  initPackager(logs, config);

  if (config.autostart) {
    setup(config);
  }
  /**
   * Hooks the global event listener, and starts up the
   * logging interval.
   * @param  {Object} config Configuration settings for the logger
   */


  function setup(config) {
    if (!exports.started) {
      setTimeout(function () {
        var state = document.readyState;

        if (config.autostart && (state === 'interactive' || state === 'complete')) {
          attachHandlers(config);
          initSender(logs, config);
          exports.started = config.on = true;
          packageCustomLog({
            type: 'load',
            logType: 'raw',
            pageLoadTime: endLoadTimestamp - startLoadTimestamp
          }, function () {}, false);
        } else {
          setup(config);
        }
      }, 100);
    }
  } // Export the Userale API


  var version = version$1;
  /**
   * Used to start the logging process if the
   * autostart configuration option is set to false.
   */

  function start() {
    if (!exports.started || config.autostart === false) {
      exports.started = config.on = true;
      config.autostart = true;
    }
  }
  /**
   * Halts the logging process. Logs will no longer be sent.
   */

  function stop() {
    exports.started = config.on = false;
    config.autostart = false;
  }
  /**
   * Updates the current configuration
   * object with the provided values.
   * @param  {Object} newConfig The configuration options to use.
   * @return {Object}           Returns the updated configuration.
   */

  function options(newConfig) {
    if (newConfig !== undefined) {
      configure(config, newConfig);
    }

    return config;
  }
  /**
   * Appends a log to the log queue.
   * @param  {Object} customLog The log to append.
   * @return {boolean}          Whether the operation succeeded.
   */

  function log(customLog) {
    if (customLog !== null && _typeof(customLog) === 'object') {
      logs.push(customLog);
      return true;
    } else {
      return false;
    }
  }

  exports.buildPath = buildPath;
  exports.details = defineCustomDetails;
  exports.filter = setLogFilter;
  exports.getSelector = getSelector;
  exports.log = log;
  exports.map = setLogMapper;
  exports.options = options;
  exports.packageCustomLog = packageCustomLog;
  exports.packageLog = packageLog;
  exports.start = start;
  exports.stop = stop;
  exports.version = version;

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

}));
