rakam.native.js

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

    /* jshint bitwise: false */

    /*
     * UTF-8 encoder/decoder
     * http://www.webtoolkit.info/
     */
    var UTF8 = {
      encode: function encode(s) {
        var utftext = '';

        for (var n = 0; n < s.length; n++) {
          var c = s.charCodeAt(n);

          if (c < 128) {
            utftext += String.fromCharCode(c);
          } else if (c > 127 && c < 2048) {
            utftext += String.fromCharCode(c >> 6 | 192);
            utftext += String.fromCharCode(c & 63 | 128);
          } else {
            utftext += String.fromCharCode(c >> 12 | 224);
            utftext += String.fromCharCode(c >> 6 & 63 | 128);
            utftext += String.fromCharCode(c & 63 | 128);
          }
        }

        return utftext;
      },
      decode: function decode(utftext) {
        var s = '';
        var i = 0;
        var c = 0,
            c1 = 0,
            c2 = 0;

        while (i < utftext.length) {
          c = utftext.charCodeAt(i);

          if (c < 128) {
            s += String.fromCharCode(c);
            i++;
          } else if (c > 191 && c < 224) {
            c1 = utftext.charCodeAt(i + 1);
            s += String.fromCharCode((c & 31) << 6 | c1 & 63);
            i += 2;
          } else {
            c1 = utftext.charCodeAt(i + 1);
            c2 = utftext.charCodeAt(i + 2);
            s += String.fromCharCode((c & 15) << 12 | (c1 & 63) << 6 | c2 & 63);
            i += 3;
          }
        }

        return s;
      }
    };

    /* jshint bitwise: false */
    /*
     * Base64 encoder/decoder
     * http://www.webtoolkit.info/
     */

    var Base64 = {
      _keyStr: 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=',
      encode: function encode(input) {
        try {
          if (window.btoa && window.atob) {
            return window.btoa(unescape(encodeURIComponent(input)));
          }
        } catch (e) {//log(e);
        }

        return Base64._encode(input);
      },
      _encode: function _encode(input) {
        var output = '';
        var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
        var i = 0;
        input = UTF8.encode(input);

        while (i < input.length) {
          chr1 = input.charCodeAt(i++);
          chr2 = input.charCodeAt(i++);
          chr3 = input.charCodeAt(i++);
          enc1 = chr1 >> 2;
          enc2 = (chr1 & 3) << 4 | chr2 >> 4;
          enc3 = (chr2 & 15) << 2 | chr3 >> 6;
          enc4 = chr3 & 63;

          if (isNaN(chr2)) {
            enc3 = enc4 = 64;
          } else if (isNaN(chr3)) {
            enc4 = 64;
          }

          output = output + Base64._keyStr.charAt(enc1) + Base64._keyStr.charAt(enc2) + Base64._keyStr.charAt(enc3) + Base64._keyStr.charAt(enc4);
        }

        return output;
      },
      decode: function decode(input) {
        try {
          if (window.btoa && window.atob) {
            return decodeURIComponent(escape(window.atob(input)));
          }
        } catch (e) {//log(e);
        }

        return Base64._decode(input);
      },
      _decode: function _decode(input) {
        var output = '';
        var chr1, chr2, chr3;
        var enc1, enc2, enc3, enc4;
        var i = 0;
        input = input.replace(/[^A-Za-z0-9\+\/\=]/g, '');

        while (i < input.length) {
          enc1 = Base64._keyStr.indexOf(input.charAt(i++));
          enc2 = Base64._keyStr.indexOf(input.charAt(i++));
          enc3 = Base64._keyStr.indexOf(input.charAt(i++));
          enc4 = Base64._keyStr.indexOf(input.charAt(i++));
          chr1 = enc1 << 2 | enc2 >> 4;
          chr2 = (enc2 & 15) << 4 | enc3 >> 2;
          chr3 = (enc3 & 3) << 6 | enc4;
          output = output + String.fromCharCode(chr1);

          if (enc3 !== 64) {
            output = output + String.fromCharCode(chr2);
          }

          if (enc4 !== 64) {
            output = output + String.fromCharCode(chr3);
          }
        }

        output = UTF8.decode(output);
        return output;
      }
    };

    // A URL safe variation on the the list of Base64 characters
    var base64Chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_';

    var base64Id = function base64Id() {
      var str = '';

      for (var i = 0; i < 22; ++i) {
        str += base64Chars.charAt(Math.floor(Math.random() * 64));
      }

      return str;
    };

    var get = function get(name) {
      try {
        var ca = document.cookie.split(';');
        var value = null;

        for (var i = 0; i < ca.length; i++) {
          var c = ca[i];

          while (c.charAt(0) === ' ') {
            c = c.substring(1, c.length);
          }

          if (c.indexOf(name) === 0) {
            value = c.substring(name.length, c.length);
            break;
          }
        }

        return value;
      } catch (e) {
        return null;
      }
    };

    var set = function set(name, value, opts) {
      var expires = value !== null ? opts.expirationDays : -1;

      if (expires) {
        var date = new Date();
        date.setTime(date.getTime() + expires * 24 * 60 * 60 * 1000);
        expires = date;
      }

      var str = name + '=' + value;

      if (expires) {
        str += '; expires=' + expires.toUTCString();
      }

      str += '; path=/';

      if (opts.domain) {
        str += '; domain=' + opts.domain;
      }

      if (opts.secure) {
        str += '; Secure';
      }

      if (opts.sameSite) {
        str += '; SameSite=' + opts.sameSite;
      }

      document.cookie = str;
    }; // test that cookies are enabled - navigator.cookiesEnabled yields false positives in IE, need to test directly


    var areCookiesEnabled = function areCookiesEnabled() {
      var uid = String(new Date());

      try {
        var cookieName = 'rakam' + base64Id();
        set(cookieName, uid, {});

        var _areCookiesEnabled = get(cookieName + '=') === uid;

        set(cookieName, null, {});
        return _areCookiesEnabled;
      } catch (e) {}

      return false;
    };

    var baseCookie = {
      set: set,
      get: get,
      areCookiesEnabled: areCookiesEnabled
    };

    var getHost = function getHost(url) {
      var a = document.createElement('a');
      a.href = url;
      return a.hostname || location.hostname;
    };

    var topDomain = function topDomain(url) {
      var host = getHost(url);
      var parts = host.split('.');
      var levels = [];
      var cname = '_tldtest_' + base64Id();

      for (var i = parts.length - 2; i >= 0; --i) {
        levels.push(parts.slice(i).join('.'));
      }

      for (var _i = 0; _i < levels.length; ++_i) {
        var domain = levels[_i];
        var opts = {
          domain: '.' + domain
        };
        baseCookie.set(cname, 1, opts);

        if (baseCookie.get(cname)) {
          baseCookie.set(cname, null, opts);
          return domain;
        }
      }

      return '';
    };

    /*
     * Cookie data
     */
    var _options = {
      expirationDays: undefined,
      domain: undefined
    };

    var reset = function reset() {
      _options = {};
    };

    var options = function options(opts) {
      if (arguments.length === 0) {
        return _options;
      }

      opts = opts || {};
      _options.expirationDays = opts.expirationDays;
      var domain = opts.domain !== undefined ? opts.domain : '.' + topDomain(window.location.href);
      var token = Math.random();
      _options.domain = domain;
      set$1('rakam_test', token);
      var stored = get$1('rakam_test');

      if (!stored || stored !== token) {
        domain = null;
      }

      remove('rakam_test');
      _options.domain = domain;
    };

    var _domainSpecific = function _domainSpecific(name) {
      // differentiate between cookies on different domains
      var suffix = '';

      if (_options.domain) {
        suffix = _options.domain.charAt(0) === '.' ? _options.domain.substring(1) : _options.domain;
      }

      return name + suffix;
    };

    var get$1 = function get(name) {
      try {
        var nameEq = _domainSpecific(name) + '=';
        var ca = document.cookie.split(';');
        var value = null;

        for (var i = 0; i < ca.length; i++) {
          var c = ca[i];

          while (c.charAt(0) === ' ') {
            c = c.substring(1, c.length);
          }

          if (c.indexOf(nameEq) === 0) {
            value = c.substring(nameEq.length, c.length);
            break;
          }
        }

        if (value) {
          return JSON.parse(Base64.decode(value));
        }

        return null;
      } catch (e) {
        return null;
      }
    };

    var set$1 = function set(name, value) {
      try {
        _set(_domainSpecific(name), Base64.encode(JSON.stringify(value)), _options);

        return true;
      } catch (e) {
        return false;
      }
    };

    var _set = function _set(name, value, opts) {
      var expires = value !== null ? opts.expirationDays : -1;

      if (expires) {
        var date = new Date();
        date.setTime(date.getTime() + expires * 24 * 60 * 60 * 1000);
        expires = date;
      }

      var str = name + '=' + value;

      if (expires) {
        str += '; expires=' + expires.toUTCString();
      }

      str += '; path=/';

      if (opts.domain) {
        str += '; domain=' + opts.domain;
      }

      document.cookie = str;
    };

    var remove = function remove(name) {
      try {
        _set(_domainSpecific(name), null, _options);

        return true;
      } catch (e) {
        return false;
      }
    };

    var Cookie = {
      reset: reset,
      options: options,
      get: get$1,
      set: set$1,
      remove: remove
    };

    var getLanguage = function getLanguage() {
      return navigator && (navigator.languages && navigator.languages[0] || navigator.language || navigator.userLanguage) || undefined;
    };

    var language = {
      language: getLanguage()
    };

    /* jshint -W020, unused: false, noempty: false, boss: true */

    /*
     * Implement localStorage to support Firefox 2-3 and IE 5-7
     */
    var localStorage; // jshint ignore:line
    // test that Window.localStorage is available and works

    function windowLocalStorageAvailable() {
      var uid = new Date();
      var result;

      try {
        window.localStorage.setItem(uid, uid);
        result = window.localStorage.getItem(uid) === String(uid);
        window.localStorage.removeItem(uid);
        return result;
      } catch (e) {// localStorage not available
      }

      return false;
    }

    if (windowLocalStorageAvailable()) {
      localStorage = window.localStorage;
    } else if (window.globalStorage) {
      // Firefox 2-3 use globalStorage
      // See https://developer.mozilla.org/en/dom/storage#globalStorage
      try {
        localStorage = window.globalStorage[window.location.hostname];
      } catch (e) {// Something bad happened...
      }
    } else {
      // IE 5-7 use userData
      // See http://msdn.microsoft.com/en-us/library/ms531424(v=vs.85).aspx
      var div = document.createElement('div'),
          attrKey = 'localStorage';
      div.style.display = 'none';
      document.getElementsByTagName('head')[0].appendChild(div);

      if (div.addBehavior) {
        div.addBehavior('#default#userdata');
        localStorage = {
          length: 0,
          setItem: function setItem(k, v) {
            div.load(attrKey);

            if (!div.getAttribute(k)) {
              this.length++;
            }

            div.setAttribute(k, v);
            div.save(attrKey);
          },
          getItem: function getItem(k) {
            div.load(attrKey);
            return div.getAttribute(k);
          },
          removeItem: function removeItem(k) {
            div.load(attrKey);

            if (div.getAttribute(k)) {
              this.length--;
            }

            div.removeAttribute(k);
            div.save(attrKey);
          },
          clear: function clear() {
            div.load(attrKey);
            var i = 0;
            var attr;

            while (attr = div.XMLDocument.documentElement.attributes[i++]) {
              div.removeAttribute(attr.name);
            }

            div.save(attrKey);
            this.length = 0;
          },
          key: function key(k) {
            div.load(attrKey);
            return div.XMLDocument.documentElement.attributes[k];
          }
        };
        div.load(attrKey);
        localStorage.length = div.XMLDocument.documentElement.attributes.length;
      }
    }

    if (!localStorage) {
      localStorage = {
        length: 0,
        setItem: function setItem(k, v) {},
        getItem: function getItem(k) {},
        removeItem: function removeItem(k) {},
        clear: function clear() {},
        key: function key(k) {}
      };
    }

    var localStorage$1 = localStorage;

    var object = {};
    var has = object.hasOwnProperty;
    function merge(a, b) {
      for (var key in b) {
        if (has.call(b, key)) {
          a[key] = b[key];
        }
      }

      return a;
    }

    /*
     * Simple AJAX request object
     */
    var Request = function Request(url, data, headers) {
      this.url = url;
      this.data = data || {};
      this.headers = headers || {};
    };

    function parseResponseHeaders(headerStr) {
      var headers = {};

      if (!headerStr) {
        return headers;
      }

      var headerPairs = headerStr.split("\r\n");

      for (var i = 0; i < headerPairs.length; i++) {
        var headerPair = headerPairs[i]; // Can't use split() here because it does the wrong thing
        // if the header value has the string ": " in it.

        var index = headerPair.indexOf(": ");

        if (index > 0) {
          var key = headerPair.substring(0, index);
          var val = headerPair.substring(index + 2);
          headers[key] = val;
        }
      }

      return headers;
    }

    Request.prototype.send = function (callback) {
      var isIE = window.XDomainRequest ? true : false;

      if (isIE) {
        var xdr = new window.XDomainRequest();
        xdr.open('POST', this.url, true);

        xdr.onload = function () {
          callback(xdr.responseText);
        };

        xdr.send(JSON.stringify(this.data));
      } else {
        var xhr = new XMLHttpRequest();
        xhr.withCredentials = "true";
        xhr.open('POST', this.url, true);

        xhr.onreadystatechange = function () {
          if (xhr.readyState === 4) {
            callback(xhr.status, xhr.responseText, parseResponseHeaders(xhr.getAllResponseHeaders()));
          }
        };

        xhr.setRequestHeader('Content-Type', 'text/plain');

        for (var key in this.headers) {
          if (this.headers.hasOwnProperty(key)) {
            xhr.setRequestHeader(key, this.headers[key]);
          }
        }

        xhr.send(JSON.stringify(this.data));
      }
    };

    /* jshint bitwise: false, laxbreak: true */

    /**
     * Taken straight from jed's gist: https://gist.github.com/982883
     *
     * Returns a random v4 UUID of the form xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx,
     * where each x is replaced with a random hexadecimal digit from 0 to f, and
     * y is replaced with a random hexadecimal digit from 8 to b.
     */
    var uuid = function uuid(a) {
      return a // if the placeholder was passed, return
      ? ( // a random number from 0 to 15
      a ^ // unless b is 8,
      Math.random() // in which case
      * 16 // a random number from
      >> a / 4 // 8 to 11
      ).toString(16) // in hexadecimal
      : ( // or otherwise a concatenated string:
      [1e7] + // 10000000 +
      -1e3 + // -1000 +
      -4e3 + // -4000 +
      -8e3 + // -80000000 +
      -1e11 // -100000000000,
      ).replace( // replacing
      /[018]/g, // zeroes, ones, and eights with
      uuid // random hex digits
      );
    };

    var version = '2.6.0';

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

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

      return _typeof(obj);
    }

    /* Taken from: https://github.com/component/type */

    /**
     * toString ref.
     */
    var toString = Object.prototype.toString;
    /**
     * Return the type of `val`.
     *
     * @param {Mixed} val
     * @return {String}
     * @api public
     */

    function type (val) {
      switch (toString.call(val)) {
        case '[object Date]':
          return 'date';

        case '[object RegExp]':
          return 'regexp';

        case '[object Arguments]':
          return 'arguments';

        case '[object Array]':
          return 'array';

        case '[object Error]':
          return 'error';
      }

      if (val === null) {
        return 'null';
      }

      if (val === undefined) {
        return 'undefined';
      }

      if (val !== val) {
        return 'nan';
      }

      if (val && val.nodeType === 1) {
        return 'element';
      }

      if (typeof Buffer !== 'undefined' && Buffer.isBuffer(val)) {
        return 'buffer';
      }

      val = val.valueOf ? val.valueOf() : Object.prototype.valueOf.apply(val);
      return _typeof(val);
    }

    /*
     * Wrapper for a user properties JSON object that supports operations.
     * Note: if a user property is used in multiple operations on the same User object,
     * only the first operation will be saved, and the rest will be ignored.
     */

    var API_VERSION = 1;

    var wrapCallback = function wrapCallback(operation, props, callback) {
      return function (status, response, headers) {
        if (callback !== undefined) {
          callback(status, response, headers);
        }
      };
    };

    var getUrl = function getUrl(options) {
      return ('https:' === window.location.protocol ? 'https' : 'http') + '://' + options.apiEndpoint + "/user";
    };

    var User = function User() {};

    User.prototype.init = function (options) {
      this.options = options;
    };

    User.prototype.set = function (properties, callback) {
      new Request(getUrl(this.options) + "/set_properties", {
        api: {
          "api_version": API_VERSION,
          "api_key": this.options.apiKey
        },
        id: this.options.userId,
        properties: properties
      }).send(wrapCallback("set_properties", properties, callback));
      return this;
    };

    User.prototype.setOnce = function (properties, callback) {
      new Request(getUrl(this.options) + "/set_properties_once", {
        api: {
          "api_version": API_VERSION,
          "api_key": this.options.apiKey
        },
        id: this.options.userId,
        properties: properties
      }).send(wrapCallback("set_properties_once", properties, callback));
      return this;
    };

    User.prototype.increment = function (property, value, callback) {
      new Request(getUrl(this.options) + "/increment_property", {
        api: {
          "api_version": API_VERSION,
          "api_key": this.options.apiKey
        },
        id: this.options.userId,
        property: property,
        value: value
      }).send(wrapCallback("increment_property", property + " by " + value, callback));
      return this;
    };

    User.prototype.unset = function (properties, callback) {
      new Request(getUrl(this.options) + "/unset_properties", {
        api: {
          "api_version": API_VERSION,
          "api_key": this.options.apiKey
        },
        id: this.options.userId,
        properties: type(properties) === "array" ? properties : [properties]
      }).send(wrapCallback("unset_properties", properties, callback));
      return this;
    };

    var API_VERSION$1 = 1;
    var DEFAULT_OPTIONS = {
      apiEndpoint: 'managed.getrakam.com',
      eventEndpointPath: '/event/batch',
      cookieExpiration: 365 * 10,
      cookieName: 'rakam_id',
      domain: undefined,
      includeUtm: false,
      trackForms: false,
      language: language.language,
      optOut: false,
      platform: 'Web',
      savedMaxCount: 1000,
      saveEvents: true,
      sessionTimeout: 30 * 60 * 1000,
      unsentKey: 'rakam_unsent',
      uploadBatchSize: 100,
      batchEvents: false,
      eventUploadThreshold: 30,
      eventUploadPeriodMillis: 30 * 1000,
      // 30s,
      useLocalStorageForSessionization: true
    };
    var StorageKeys = {
      LAST_ID: 'rakam_lastEventId',
      LAST_EVENT_TIME: 'rakam_lastEventTime',
      SESSION_ID: 'rakam_sessionId',
      RETURNING_SESSION: 'rakam_returning'
    };

    var getSessionItem = function getSessionItem(options, key) {
      if (options.useLocalStorageForSessionization) {
        return localStorage$1.getItem(key);
      } else {
        return Cookie.get(key);
      }
    };

    var setSessionItem = function setSessionItem(options, key, value) {
      if (options.useLocalStorageForSessionization) {
        localStorage$1.setItem(key, value);
      } else {
        Cookie.set(key, value);
      }
    };
    /*
     * Rakam API
     */


    var Rakam = function Rakam() {
      this._unsentEvents = [];
      this.options = merge({}, DEFAULT_OPTIONS);
    };

    Rakam.prototype._eventId = 0;
    Rakam.prototype._returningUser = false;
    Rakam.prototype._sending = false;
    Rakam.prototype._lastEventTime = null;
    Rakam.prototype._sessionId = null;
    Rakam.prototype._newSession = false;

    Rakam.prototype.log = function (s) {
      if (this.options.debug === true) {
        console.log('[Rakam] ' + s);
      }
    };
    /**
     * Initializes Rakam.
     * apiKey The API Key for your app
     * opt_userId An identifier for this user
     * opt_config Configuration options
     *   - saveEvents (boolean) Whether to save events to local storage. Defaults to true.
     *   - includeUtm (boolean) Whether to send utm parameters with events. Defaults to false.
     */


    Rakam.prototype.init = function (apiKey, opt_userId, opt_config, callback) {
      try {
        if (!apiKey) {
          throw new Error('apiKey is null');
        }

        this.options.apiKey = apiKey;
        var user = new User();
        user.init(this.options);

        this.User = function () {
          return user;
        };

        if (opt_config) {
          this.options.apiEndpoint = opt_config.apiEndpoint || this.options.apiEndpoint;
          this.options.debug = opt_config.debug || this.options.debug === true;

          if (opt_config.saveEvents !== undefined) {
            this.options.saveEvents = !!opt_config.saveEvents;
          }

          if (opt_config.domain !== undefined) {
            this.options.domain = opt_config.domain;
          }

          if (opt_config.includeUtm !== undefined) {
            this.options.includeUtm = !!opt_config.includeUtm;
          }

          if (opt_config.trackClicks !== undefined) {
            this.options.trackClicks = !!opt_config.trackClicks;
          }

          if (opt_config.trackForms !== undefined) {
            this.options.trackForms = !!opt_config.trackForms;
          }

          if (opt_config.batchEvents !== undefined) {
            this.options.batchEvents = !!opt_config.batchEvents;
          }

          this.options.platform = opt_config.platform || this.options.platform;
          this.options.useLocalStorageForSessionization = opt_config.useLocalStorageForSessionization !== undefined ? opt_config.useLocalStorageForSessionization : this.options.useLocalStorageForSessionization;
          this.options.language = opt_config.language || this.options.language;
          this.options.sessionTimeout = opt_config.sessionTimeout || this.options.sessionTimeout;
          this.options.uploadBatchSize = opt_config.uploadBatchSize || this.options.uploadBatchSize;
          this.options.eventUploadThreshold = opt_config.eventUploadThreshold || this.options.eventUploadThreshold;
          this.options.savedMaxCount = opt_config.savedMaxCount || this.options.savedMaxCount;
          this.options.eventUploadPeriodMillis = opt_config.eventUploadPeriodMillis || this.options.eventUploadPeriodMillis;
          this.options.superProperties = opt_config.superProperties || [];
        }

        Cookie.options({
          expirationDays: this.options.cookieExpiration,
          domain: this.options.domain
        });
        this.options.domain = Cookie.options().domain;

        _loadCookieData(this);

        if (opt_config && opt_config.deviceId !== undefined && opt_config.deviceId !== null && opt_config.deviceId || this.options.deviceId) {
          this.options.deviceId = this.options.deviceId;
        } else {
          this.deviceIdCreatedAt = new Date();
          this.options.deviceId = uuid();
        }

        _saveCookieData(this);

        this.log('initialized with apiKey=' + apiKey);

        if (this.options.saveEvents) {
          var savedUnsentEventsString = localStorage$1.getItem(this.options.unsentKey);

          if (savedUnsentEventsString) {
            try {
              this._unsentEvents = JSON.parse(savedUnsentEventsString);
            } catch (e) {
              this.log(e);
            }
          }
        }

        this._sendEventsIfReady();

        if (this.options.includeUtm) {
          this._initUtmData();
        }

        if (this.options.trackForms) {
          this._initTrackForms();
        }

        if (this.options.trackClicks) {
          this._initTrackClicks();
        }

        this._lastEventTime = parseInt(getSessionItem(this.options, StorageKeys.LAST_EVENT_TIME)) || null;
        this._sessionId = parseInt(getSessionItem(this.options, StorageKeys.SESSION_ID)) || null;
        this._eventId = localStorage$1.getItem(StorageKeys.LAST_ID) || 0;
        var now = new Date().getTime();

        if (!this._sessionId || !this._lastEventTime || now - this._lastEventTime > this.options.sessionTimeout) {
          if (this._sessionId !== null) {
            setSessionItem(this.options, StorageKeys.RETURNING_SESSION, true);
            this._returningUser = true;
          }

          this._sessionId = now;
          setSessionItem(this.options, StorageKeys.SESSION_ID, this._sessionId);
        } else {
          this._returningUser = getSessionItem(this.options, StorageKeys.RETURNING_SESSION) === 'true';
        }

        this._lastEventTime = now;
        setSessionItem(this.options, StorageKeys.LAST_EVENT_TIME, this._lastEventTime);
      } catch (e) {
        this.log(e);
      }

      this.setUserId(opt_userId);

      if (callback && typeof callback === 'function') {
        setTimeout(function () {
          callback();
        }, 1);
      }
    };

    Rakam.prototype.onEvent = function (callback) {
      this.options.eventCallbacks = this.options.eventCallbacks || [];
      this.options.eventCallbacks.push(callback);
    };

    var transformValue = function transformValue(_this, attribute, value, type) {
      if (type !== null) {
        type = type.toLowerCase();
      }

      if (type === 'long' || type === 'time' || type === 'timestamp' || type === 'date') {
        value = parseInt(value);

        if (isNaN(value) || !isFinite(value)) {
          _this.log('ignoring ' + attribute + ': the value must be a number');

          value = null;
        }
      } else if (type === 'double') {
        value = parseFloat(value);

        if (isNaN(value) || !isFinite(value)) {
          _this.log('ignoring ' + attribute + ': the value is not double');

          value = null;
        }
      } else if (type === 'boolean') {
        if (type === 'true' || type === '1') {
          value = true;
        } else if (type === 'false' || type === '0') {
          value = false;
        } else {
          _this.log('ignoring ' + attribute + ': the value is not boolean');

          value = null;
        }
      }

      return value;
    };

    Rakam.prototype.logInlinedEvent = function (collection, extraProperties, callback) {
      var getAllElementsWithAttribute = function getAllElementsWithAttribute(attribute) {
        if (document.querySelectorAll) {
          return document.querySelectorAll('[rakam-event-attribute]');
        }

        var matchingElements = [];
        var allElements = document.getElementsByTagName('*');

        for (var i = 0, n = allElements.length; i < n; i++) {
          if (allElements[i].getAttribute(attribute) !== null) {
            matchingElements.push(allElements[i]);
          }
        }

        return matchingElements;
      };

      var properties = extraProperties || {};
      var elements = getAllElementsWithAttribute('rakam-event-attribute');

      for (var i = 0; i < elements.length; i++) {
        var element = elements[i];
        var attribute = element.getAttribute('rakam-event-attribute');
        var value = element.getAttribute('rakam-event-attribute-value');
        var type = element.getAttribute('rakam-event-attribute-type');

        if (value === null) {
          if (element.tagName === 'INPUT') {
            value = element.value;
          } else if (element.tagName === 'SELECT') {
            var option = element.options[element.selectedIndex];

            if (option.value !== null && option.value !== '') {
              var attr = element.getAttribute('rakam-attribute-value');

              if (attr !== 'value') {
                value = option.value;
              } else {
                value = option.text;
              }
            }
          } else if (element.innerText) {
            value = element.innerText.replace(/^\s+|\s+$/g, '');
          } else {
            this.log('Could find value of DOM element.', element);
          }
        }

        if (value !== null && value !== '') {
          properties[attribute] = transformValue(this, attribute, value, type);
        }
      }

      this.logEvent(collection, properties, callback);
    };

    Rakam.prototype.isReturningUser = function () {
      return this._returningUser;
    };

    Rakam.prototype.resetTimer = function () {
      console.log('[Rakam WARN] rakam.resetTimer function is removed from the API.');
    };

    Rakam.prototype.startTimer = function () {
      console.log('[Rakam WARN] rakam.startTimer function is removed from the API.');
    };

    Rakam.prototype.getTimeOnPage = function () {
      console.log('[Rakam WARN] rakam.getTimeOnPage function is removed from the API.');
    };

    Rakam.prototype.getTimeOnPreviousPage = function () {
      console.log('[Rakam WARN] rakam.getTimeOnPreviousPage function is removed from the API.');
    };

    Rakam.prototype.nextEventId = function () {
      this._eventId++;
      return this._eventId;
    }; // returns true if sendEvents called immediately


    Rakam.prototype._sendEventsIfReady = function (callback) {
      if (this._unsentEvents.length === 0) {
        return false;
      }

      if (!this.options.batchEvents) {
        this.sendEvents(callback);
        return true;
      }

      if (this._unsentEvents.length >= this.options.eventUploadThreshold) {
        this.sendEvents(callback);
        return true;
      }

      setTimeout(this.sendEvents.bind(this), this.options.eventUploadPeriodMillis);
      return false;
    };

    var _loadCookieData = function _loadCookieData(scope) {
      var cookieData = Cookie.get(scope.options.cookieName);

      if (cookieData) {
        if (cookieData.deviceId) {
          scope.options.deviceId = cookieData.deviceId;
        }

        if (cookieData.userId) {
          scope.options.userId = cookieData.userId;
        }

        if (cookieData.superProps) {
          scope.options.superProperties = cookieData.superProps;
        }

        if (cookieData.optOut !== undefined) {
          scope.options.optOut = cookieData.optOut;
        }

        if (cookieData.deviceIdCreatedAt !== undefined) {
          scope.deviceIdCreatedAt = new Date(parseInt(cookieData.deviceIdCreatedAt));
        }
      }
    };

    var _saveCookieData = function _saveCookieData(scope) {
      Cookie.set(scope.options.cookieName, {
        deviceId: scope.options.deviceId,
        deviceIdCreatedAt: scope.deviceIdCreatedAt ? scope.deviceIdCreatedAt.getTime() : undefined,
        userId: scope.options.userId,
        superProps: scope.options.superProperties,
        optOut: scope.options.optOut
      });
    };

    Rakam._getUtmParam = function (name, query) {
      name = name.replace(/[\[]/, '\\[').replace(/[\]]/, '\\]');
      var regex = new RegExp('[\\?&]' + name + '=([^&#]*)');
      var results = regex.exec(query);
      return results === null ? undefined : decodeURIComponent(results[1].replace(/\+/g, ' '));
    };

    Rakam._getUtmData = function (rawCookie, query) {
      // Translate the utmz cookie format into url query string format.
      var cookie = rawCookie ? '?' + rawCookie.split('.').slice(-1)[0].replace(/\|/g, '&') : '';

      var fetchParam = function fetchParam(queryName, query, cookieName, cookie) {
        return Rakam._getUtmParam(queryName, query) || Rakam._getUtmParam(cookieName, cookie);
      };

      return {
        utm_source: fetchParam('utm_source', query, 'utmcsr', cookie),
        utm_medium: fetchParam('utm_medium', query, 'utmcmd', cookie),
        utm_campaign: fetchParam('utm_campaign', query, 'utmccn', cookie),
        utm_term: fetchParam('utm_term', query, 'utmctr', cookie),
        utm_content: fetchParam('utm_content', query, 'utmcct', cookie)
      };
    };
    /**
     * Parse the utm properties out of cookies and query for adding to user properties.
     */


    Rakam.prototype._initUtmData = function (queryParams, cookieParams) {
      queryParams = queryParams || location.search;
      cookieParams = cookieParams || Cookie.get('__utmz');
      this._utmProperties = Rakam._getUtmData(cookieParams, queryParams);
    };

    Rakam.prototype._initTrackForms = function () {
      var _this = this;

      document.addEventListener('submit', function (event) {
        var targetElement = event.target || event.srcElement;
        var collection = targetElement.getAttribute('rakam-event-form');

        if (targetElement.tagName === 'FORM' && collection) {
          var properties = {};
          var extraAttributes = targetElement.getAttribute('rakam-event-extra');

          if (extraAttributes !== null) {
            for (var key in JSON.parse(extraAttributes)) {
              if (extraAttributes.hasOwnProperty(key)) {
                properties[key] = extraAttributes[key];
              }
            }
          }

          for (var i = 0; i < targetElement.elements.length; i++) {
            var element = targetElement.elements[i];
            var type = element.getAttribute('rakam-event-attribute-type');
            var formElemType;

            if (element.hasAttribute('type')) {
              formElemType = element.getAttribute('type').toLowerCase();
            }

            if (formElemType === 'password') {
              continue;
            }

            if (type === null && element.tagName === 'INPUT' && formElemType === 'number') {
              type = 'long';
            }

            if (element.hasAttribute('rakam-event-form-element-ignore')) {
              continue;
            }

            var attribute;

            if (element.hasAttribute('rakam-event-attribute')) {
              attribute = element.getAttribute('rakam-event-attribute');
            } else {
              attribute = element.getAttribute('name');
            }

            if (element.hasAttribute('rakam-event-attribute-value')) {
              properties[attribute] = transformValue(this, attribute, element.getAttribute('rakam-event-attribute-value'), type);
            } else if (element.tagName === 'SELECT') {
              properties[attribute] = transformValue(this, attribute, element.options[element.selectedIndex].value, type);
            } else if (element.tagName === 'INPUT' || element.tagName === 'TEXTAREA') {
              properties[attribute] = transformValue(this, attribute, element.value, type);
            } else {
              _this.log('Couldn\'t get value of form element: ' + attribute);
            }
          }

          _this.logEvent(collection, properties);
        }
      });
    };

    Rakam.prototype._initTrackClicks = function () {
      var _this = this;

      document.addEventListener('click', function (event) {
        var targetElement = event.target || event.srcElement;
        var collection = targetElement.getAttribute('rakam-event-track');

        if (targetElement.tagName === 'FORM' && collection) {
          var properties = {};
          var extraAttributes = targetElement.getAttribute('rakam-event-properties');

          if (extraAttributes !== null) {
            for (var key in JSON.parse(extraAttributes)) {
              if (extraAttributes.hasOwnProperty(key)) {
                properties[key] = extraAttributes[key];
              }
            }
          }

          _this.logEvent(collection, properties);
        }
      });
    };

    Rakam.prototype.saveEvents = function () {
      try {
        localStorage$1.setItem(this.options.unsentKey, JSON.stringify(this._unsentEvents));
      } catch (e) {
        this.log(e);
      }
    };

    Rakam.prototype.setDomain = function (domain) {
      try {
        Cookie.options({
          domain: domain
        });
        this.options.domain = Cookie.options().domain;

        _loadCookieData(this);

        _saveCookieData(this);

        this.log('set domain=' + domain);
      } catch (e) {
        this.log(e);
      }
    };

    Rakam.prototype.setUserId = function (userId) {
      try {
        this.options.userId = userId !== undefined && userId !== null && '' + userId || null;

        _saveCookieData(this);

        this.log('set userId=' + userId);
      } catch (e) {
        this.log(e);
      }
    };

    Rakam.prototype.setUserProperties = function (parameters) {
      try {
        return new this.User().set(parameters);
      } catch (e) {
        this.log(e);
      }
    };

    Rakam.prototype.getUserId = function () {
      return this.options.userId;
    };

    Rakam.prototype.getDeviceId = function () {
      return this._eventId > 0 ? this.options.deviceId : null;
    };

    Rakam.prototype.setOptOut = function (enable) {
      try {
        this.options.optOut = enable;

        _saveCookieData(this);

        this.log('set optOut=' + enable);
      } catch (e) {
        this.log(e);
      }
    };

    Rakam.prototype.setDeviceId = function (deviceId) {
      try {
        if (deviceId) {
          this.options.deviceId = '' + deviceId;

          _saveCookieData(this);
        }
      } catch (e) {
        this.log(e);
      }
    };

    Rakam.prototype.setSuperProperties = function (eventProps, opt_replace) {
      try {
        this.options.superProperties = this.options.superProperties || {};

        for (var property in eventProps) {
          if (eventProps.hasOwnProperty(property)) {
            if (opt_replace === false && this.options.superProperties[property] !== undefined) {
              continue;
            }

            this.options.superProperties[property] = eventProps[property];
          }
        }

        _saveCookieData(this);

        this.log('set super properties=' + JSON.stringify(eventProps));
      } catch (e) {
        this.log(e);
      }
    };

    Rakam.prototype.setVersionName = function (versionName) {
      try {
        this.options.versionName = versionName;
        this.log('set versionName=' + versionName);
      } catch (e) {
        this.log(e);
      }
    };
    /**
     * Private logEvent method. Keeps apiProperties from being publicly exposed.
     */


    Rakam.prototype._logEvent = function (eventType, eventProperties, apiProperties, callback) {
      if (typeof callback !== 'function') {
        callback = null;
      }

      if (!eventType || this.options.optOut) {
        if (callback) {
          callback(0, 'No request sent');
        }

        return;
      }

      try {
        var eventTime = new Date().getTime();
        var eventId = this.nextEventId();

        if (!this._sessionId || !this._lastEventTime || eventTime - this._lastEventTime > this.options.sessionTimeout) {
          this._sessionId = eventTime;
          setSessionItem(this.options, StorageKeys.SESSION_ID, this._sessionId);
        }

        this._lastEventTime = eventTime;
        setSessionItem(this.options, StorageKeys.LAST_EVENT_TIME, this._lastEventTime);
        setSessionItem(this.options, StorageKeys.LAST_ID, eventId);
        apiProperties = apiProperties || {};
        eventProperties = eventProperties || {}; // Add the utm properties, if any, onto the event properties.

        merge(eventProperties, this._utmProperties);
        var event = {
          collection: eventType,
          properties: {
            _device_id: this.options.deviceId,
            _user: this.options.userId,
            // use seconds
            _time: parseInt(eventTime / 1000) * 1000,
            _session_id: this._sessionId || -1,
            _platform: this.options.platform,
            _language: this.options.language
          }
        };
        merge(event.properties, this.options.superProperties);
        merge(event.properties, apiProperties);
        merge(event.properties, eventProperties);
        this.log('logged eventType=' + eventType + ', properties=' + JSON.stringify(eventProperties));

        this._unsentEvents.push({
          id: eventId,
          event: event
        }); // Remove old events from the beginning of the array if too many
        // have accumulated. Don't want to kill memory. Default is 1000 events.


        if (this._unsentEvents.length > this.options.savedMaxCount) {
          this._unsentEvents.splice(0, this._unsentEvents.length - this.options.savedMaxCount);
        }

        if (this.options.saveEvents) {
          this.saveEvents();
        }

        if (!this._sendEventsIfReady(callback) && callback) {
          callback(0, 'No request sent');
        }

        return eventId;
      } catch (e) {
        this.log(e);
      }
    };

    Rakam.prototype.logEvent = function (eventType, eventProperties, callback) {
      return this._logEvent(eventType, eventProperties, null, callback);
    };
    /**
     * Remove events in storage with event ids up to and including maxEventId. Does
     * a true filter in case events get out of order or old events are removed.
     */


    Rakam.prototype.removeEvents = function (maxEventId, errors) {
      var filteredEvents = [];
      var errorList = errors || [];

      for (var i = 0; i < this._unsentEvents.length; i++) {
        var id = this._unsentEvents[i].id;

        if (errorList.indexOf(id) > -1 || id > maxEventId) {
          filteredEvents.push(this._unsentEvents[i]);
        }
      }

      this._unsentEvents = filteredEvents;
    };

    Rakam.prototype.sendEvents = function (callback) {
      var _this = this;

      if (!this._sending && !this.options.optOut && this._unsentEvents.length > 0) {
        this._sending = true;
        var url = ('https:' === window.location.protocol ? 'https' : 'http') + '://' + this.options.apiEndpoint + this.options.eventEndpointPath; // Determine how many events to send and track the maximum event id sent in this batch.

        var numEvents = Math.min(this._unsentEvents.length, this.options.uploadBatchSize);
        var maxEventId = this._unsentEvents[numEvents - 1].id;

        this._unsentEvents.slice(0, numEvents);

        var events = this._unsentEvents.slice(0, numEvents).map(function (e) {
          return e.event;
        });

        var upload_time = new Date().getTime();
        var api = {
          'upload_time': upload_time,
          'api_version': API_VERSION$1,
          'api_key': this.options.apiKey //"checksum": md5(API_VERSION + JSON.stringify(events) + upload_time).toUpperCase()

        };
        var scope = this;
        new Request(url, {
          api: api,
          events: events
        }).send(function (status, response, headers) {
          scope._sending = false;

          try {
            if (status === 200 || status === 409) {
              _this.log('successful upload');

              scope.removeEvents(maxEventId, status === 409 ? JSON.parse(response) : null); // Update the event cache after the removal of sent events.

              if (scope.options.saveEvents) {
                scope.saveEvents();
              } // Send more events if any queued during previous send.


              if (!scope._sendEventsIfReady(callback) && callback) {
                callback(status, response);
              }
            } else if (status === 413) {
              _this.log('request too large'); // Can't even get this one massive event through. Drop it.


              if (scope.options.uploadBatchSize === 1) {
                scope.removeEvents(maxEventId);
              } // The server complained about the length of the request.
              // Backoff and try again.


              scope.options.uploadBatchSize = Math.ceil(numEvents / 2);
              scope.sendEvents(callback);
            } else if (callback) {
              // If server turns something like a 400
              callback(status, response);
            }
          } catch (e) {
            _this.log('failed upload');
          }

          if (scope.options.eventCallbacks) {
            try {
              for (var i = 0; i < scope.options.eventCallbacks.length; i++) {
                scope.options.eventCallbacks[i](status, response, headers);
              }
            } catch (e) {
              _this.log('callback throws an exception', e);
            }
          }
        });
      } else if (callback) {
        callback(0, 'No request sent');
      }
    };

    Rakam.prototype.onload = function (callback) {
      var _this = this;

      setTimeout(function () {
        callback();

        _this.log('executed callback', callback);
      }, 1);
    };

    Rakam.prototype.runQueuedFunctions = function () {
      for (var i = 0; i < this._q.length; i++) {
        var fn = this[this._q[i][0]];

        if (fn && type(fn) === 'function') {
          fn.apply(this, this._q[i].slice(1));
        }
      }

      this._q = []; // clear function queue after running
    };

    Rakam.prototype.__VERSION__ = version;

    /* jshint expr:true */
    var old = window.rakam || {};
    var instance = new Rakam();
    instance._q = old._q || []; // export the instance

    return instance;

})));