react-native-vast-client/dist/vast-client.js

JavaScript VAST Client

var VAST = (function (exports) {
  'use strict';

  var classCallCheck = function (instance, Constructor) {
    if (!(instance instanceof Constructor)) {
      throw new TypeError("Cannot call a class as a function");
    }
  };

  var createClass = function () {
    function defineProperties(target, props) {
      for (var i = 0; i < props.length; i++) {
        var descriptor = props[i];
        descriptor.enumerable = descriptor.enumerable || false;
        descriptor.configurable = true;
        if ("value" in descriptor) descriptor.writable = true;
        Object.defineProperty(target, descriptor.key, descriptor);
      }
    }

    return function (Constructor, protoProps, staticProps) {
      if (protoProps) defineProperties(Constructor.prototype, protoProps);
      if (staticProps) defineProperties(Constructor, staticProps);
      return Constructor;
    };
  }();

  var inherits = function (subClass, superClass) {
    if (typeof superClass !== "function" && superClass !== null) {
      throw new TypeError("Super expression must either be null or a function, not " + typeof superClass);
    }

    subClass.prototype = Object.create(superClass && superClass.prototype, {
      constructor: {
        value: subClass,
        enumerable: false,
        writable: true,
        configurable: true
      }
    });
    if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass;
  };

  var possibleConstructorReturn = function (self, call) {
    if (!self) {
      throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
    }

    return call && (typeof call === "object" || typeof call === "function") ? call : self;
  };

  var Ad = function Ad() {
    classCallCheck(this, Ad);

    this.id = null;
    this.sequence = null;
    this.system = null;
    this.title = null;
    this.description = null;
    this.advertiser = null;
    this.pricing = null;
    this.survey = null;
    this.errorURLTemplates = [];
    this.impressionURLTemplates = [];
    this.creatives = [];
    this.extensions = [];
  };

  var AdExtension = function AdExtension() {
    classCallCheck(this, AdExtension);

    this.attributes = {};
    this.children = [];
  };

  var AdExtensionChild = function AdExtensionChild() {
    classCallCheck(this, AdExtensionChild);

    this.name = null;
    this.value = null;
    this.attributes = {};
  };

  var CompanionAd = function CompanionAd() {
    classCallCheck(this, CompanionAd);

    this.id = null;
    this.width = 0;
    this.height = 0;
    this.type = null;
    this.staticResource = null;
    this.htmlResource = null;
    this.iframeResource = null;
    this.altText = null;
    this.companionClickThroughURLTemplate = null;
    this.companionClickTrackingURLTemplates = [];
    this.trackingEvents = {};
  };

  var Creative = function Creative() {
    var creativeAttributes = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
    classCallCheck(this, Creative);

    this.id = creativeAttributes.id || null;
    this.adId = creativeAttributes.adId || null;
    this.sequence = creativeAttributes.sequence || null;
    this.apiFramework = creativeAttributes.apiFramework || null;
    this.trackingEvents = {};
  };

  var CreativeCompanion = function (_Creative) {
    inherits(CreativeCompanion, _Creative);

    function CreativeCompanion() {
      var creativeAttributes = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
      classCallCheck(this, CreativeCompanion);

      var _this = possibleConstructorReturn(this, (CreativeCompanion.__proto__ || Object.getPrototypeOf(CreativeCompanion)).call(this, creativeAttributes));

      _this.type = 'companion';
      _this.variations = [];
      return _this;
    }

    return CreativeCompanion;
  }(Creative);

  function track(URLTemplates, variables, options) {
    var URLs = resolveURLTemplates(URLTemplates, variables, options);

    URLs.forEach(function (URL) {
      if (typeof window !== 'undefined' && window !== null) {
        var i = new Image();
        i.src = URL;
      }
    });
  }

  /**
   * Replace the provided URLTemplates with the given values
   *
   * @param {Array} URLTemplates - An array of tracking url templates.
   * @param {Object} [variables={}] - An optional Object of parameters to be used in the tracking calls.
   * @param {Object} [options={}] - An optional Object of options to be used in the tracking calls.
   */
  function resolveURLTemplates(URLTemplates) {
    var variables = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
    var options = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};

    var URLs = [];

    // Encode String variables, when given
    if (variables['ASSETURI']) {
      variables['ASSETURI'] = encodeURIComponentRFC3986(variables['ASSETURI']);
    }
    if (variables['CONTENTPLAYHEAD']) {
      variables['CONTENTPLAYHEAD'] = encodeURIComponentRFC3986(variables['CONTENTPLAYHEAD']);
    }

    // Set default value for invalid ERRORCODE
    if (variables['ERRORCODE'] && !options.isCustomCode && !/^[0-9]{3}$/.test(variables['ERRORCODE'])) {
      variables['ERRORCODE'] = 900;
    }

    // Calc random/time based macros
    variables['CACHEBUSTING'] = leftpad(Math.round(Math.random() * 1.0e8).toString());
    variables['TIMESTAMP'] = encodeURIComponentRFC3986(new Date().toISOString());

    // RANDOM/random is not defined in VAST 3/4 as a valid macro tho it's used by some adServer (Auditude)
    variables['RANDOM'] = variables['random'] = variables['CACHEBUSTING'];

    for (var URLTemplateKey in URLTemplates) {
      var resolveURL = URLTemplates[URLTemplateKey];

      if (typeof resolveURL !== 'string') {
        continue;
      }

      for (var key in variables) {
        var value = variables[key];
        var macro1 = '[' + key + ']';
        var macro2 = '%%' + key + '%%';
        resolveURL = resolveURL.replace(macro1, value);
        resolveURL = resolveURL.replace(macro2, value);
      }
      URLs.push(resolveURL);
    }

    return URLs;
  }

  // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/encodeURIComponent
  function encodeURIComponentRFC3986(str) {
    return encodeURIComponent(str).replace(/[!'()*]/g, function (c) {
      return '%' + c.charCodeAt(0).toString(16);
    });
  }

  function leftpad(str) {
    if (str.length < 8) {
      return range(0, 8 - str.length, false).map(function () {
        return '0';
      }).join('') + str;
    }
    return str;
  }

  function range(left, right, inclusive) {
    var result = [];
    var ascending = left < right;
    var end = !inclusive ? right : ascending ? right + 1 : right - 1;

    for (var i = left; ascending ? i < end : i > end; ascending ? i++ : i--) {
      result.push(i);
    }
    return result;
  }

  function isNumeric(n) {
    return !isNaN(parseFloat(n)) && isFinite(n);
  }

  function flatten(arr) {
    return arr.reduce(function (flat, toFlatten) {
      return flat.concat(Array.isArray(toFlatten) ? flatten(toFlatten) : toFlatten);
    }, []);
  }

  var util = {
    track: track,
    resolveURLTemplates: resolveURLTemplates,
    encodeURIComponentRFC3986: encodeURIComponentRFC3986,
    leftpad: leftpad,
    range: range,
    isNumeric: isNumeric,
    flatten: flatten
  };

  /**
   * This module provides support methods to the parsing classes.
   */

  /**
   * Returns the first element of the given node which nodeName matches the given name.
   * @param  {Object} node - The node to use to find a match.
   * @param  {String} name - The name to look for.
   * @return {Object}
   */
  function childByName(node, name) {
    var childNodes = node.childNodes;

    for (var childKey in childNodes) {
      var child = childNodes[childKey];

      if (child.nodeName === name) {
        return child;
      }
    }
  }

  /**
   * Returns all the elements of the given node which nodeName match the given name.
   * @param  {any} node - The node to use to find the matches.
   * @param  {any} name - The name to look for.
   * @return {Array}
   */
  function childrenByName(node, name) {
    var children = [];
    var childNodes = node.childNodes;

    for (var childKey in childNodes) {
      var child = childNodes[childKey];

      if (child.nodeName === name) {
        children.push(child);
      }
    }
    return children;
  }

  /**
   * Converts relative vastAdTagUri.
   * @param  {String} vastAdTagUrl - The url to resolve.
   * @param  {String} originalUrl - The original url.
   * @return {String}
   */
  function resolveVastAdTagURI(vastAdTagUrl, originalUrl) {
    if (!originalUrl) {
      return vastAdTagUrl;
    }

    if (vastAdTagUrl.indexOf('//') === 0) {
      var _location = location,
          protocol = _location.protocol;

      return '' + protocol + vastAdTagUrl;
    }

    if (vastAdTagUrl.indexOf('://') === -1) {
      // Resolve relative URLs (mainly for unit testing)
      var baseURL = originalUrl.slice(0, originalUrl.lastIndexOf('/'));
      return baseURL + '/' + vastAdTagUrl;
    }

    return vastAdTagUrl;
  }

  /**
   * Converts a boolean string into a Boolean.
   * @param  {String} booleanString - The boolean string to convert.
   * @return {Boolean}
   */
  function parseBoolean(booleanString) {
    return ['true', 'TRUE', '1'].indexOf(booleanString) !== -1;
  }

  /**
   * Parses a node text (for legacy support).
   * @param  {Object} node - The node to parse the text from.
   * @return {String}
   */
  function parseNodeText(node) {
    return node && (node.textContent || node.text || '').trim();
  }

  /**
   * Copies an attribute from a node to another.
   * @param  {String} attributeName - The name of the attribute to clone.
   * @param  {Object} nodeSource - The source node to copy the attribute from.
   * @param  {Object} nodeDestination - The destination node to copy the attribute at.
   */
  function copyNodeAttribute(attributeName, nodeSource, nodeDestination) {
    var attributeValue = nodeSource.getAttribute(attributeName);
    if (attributeValue) {
      nodeDestination.setAttribute(attributeName, attributeValue);
    }
  }

  /**
   * Parses a String duration into a Number.
   * @param  {String} durationString - The dureation represented as a string.
   * @return {Number}
   */
  function parseDuration(durationString) {
    if (durationString === null || typeof durationString === 'undefined') {
      return -1;
    }
    // Some VAST doesn't have an HH:MM:SS duration format but instead jus the number of seconds
    if (util.isNumeric(durationString)) {
      return parseInt(durationString);
    }

    var durationComponents = durationString.split(':');
    if (durationComponents.length !== 3) {
      return -1;
    }

    var secondsAndMS = durationComponents[2].split('.');
    var seconds = parseInt(secondsAndMS[0]);
    if (secondsAndMS.length === 2) {
      seconds += parseFloat('0.' + secondsAndMS[1]);
    }

    var minutes = parseInt(durationComponents[1] * 60);
    var hours = parseInt(durationComponents[0] * 60 * 60);

    if (isNaN(hours) || isNaN(minutes) || isNaN(seconds) || minutes > 60 * 60 || seconds > 60) {
      return -1;
    }
    return hours + minutes + seconds;
  }

  /**
   * Splits an Array of ads into an Array of Arrays of ads.
   * Each subarray contains either one ad or multiple ads (an AdPod)
   * @param  {Array} ads - An Array of ads to split
   * @return {Array}
   */
  function splitVAST(ads) {
    var splittedVAST = [];
    var lastAdPod = null;

    ads.forEach(function (ad, i) {
      if (ad.sequence) {
        ad.sequence = parseInt(ad.sequence, 10);
      }
      // The current Ad may be the next Ad of an AdPod
      if (ad.sequence > 1) {
        var lastAd = ads[i - 1];
        // check if the current Ad is exactly the next one in the AdPod
        if (lastAd && lastAd.sequence === ad.sequence - 1) {
          lastAdPod && lastAdPod.push(ad);
          return;
        }
        // If the ad had a sequence attribute but it was not part of a correctly formed
        // AdPod, let's remove the sequence attribute
        delete ad.sequence;
      }

      lastAdPod = [ad];
      splittedVAST.push(lastAdPod);
    });

    return splittedVAST;
  }

  /**
   * Merges the data between an unwrapped ad and his wrapper.
   * @param  {Ad} unwrappedAd - The 'unwrapped' Ad.
   * @param  {Ad} wrapper - The wrapper Ad.
   * @return {void}
   */
  function mergeWrapperAdData(unwrappedAd, wrapper) {
    unwrappedAd.errorURLTemplates = wrapper.errorURLTemplates.concat(unwrappedAd.errorURLTemplates);
    unwrappedAd.impressionURLTemplates = wrapper.impressionURLTemplates.concat(unwrappedAd.impressionURLTemplates);
    unwrappedAd.extensions = wrapper.extensions.concat(unwrappedAd.extensions);

    unwrappedAd.creatives.forEach(function (creative) {
      if (wrapper.trackingEvents && wrapper.trackingEvents[creative.type]) {
        for (var eventName in wrapper.trackingEvents[creative.type]) {
          var urls = wrapper.trackingEvents[creative.type][eventName];
          if (!Array.isArray(creative.trackingEvents[eventName])) {
            creative.trackingEvents[eventName] = [];
          }
          creative.trackingEvents[eventName] = creative.trackingEvents[eventName].concat(urls);
        }
      }
    });

    if (wrapper.videoClickTrackingURLTemplates && wrapper.videoClickTrackingURLTemplates.length) {
      unwrappedAd.creatives.forEach(function (creative) {
        if (creative.type === 'linear') {
          creative.videoClickTrackingURLTemplates = creative.videoClickTrackingURLTemplates.concat(wrapper.videoClickTrackingURLTemplates);
        }
      });
    }

    if (wrapper.videoCustomClickURLTemplates && wrapper.videoCustomClickURLTemplates.length) {
      unwrappedAd.creatives.forEach(function (creative) {
        if (creative.type === 'linear') {
          creative.videoCustomClickURLTemplates = creative.videoCustomClickURLTemplates.concat(wrapper.videoCustomClickURLTemplates);
        }
      });
    }

    // VAST 2.0 support - Use Wrapper/linear/clickThrough when Inline/Linear/clickThrough is null
    if (wrapper.videoClickThroughURLTemplate) {
      unwrappedAd.creatives.forEach(function (creative) {
        if (creative.type === 'linear' && (creative.videoClickThroughURLTemplate === null || typeof creative.videoClickThroughURLTemplate === 'undefined')) {
          creative.videoClickThroughURLTemplate = wrapper.videoClickThroughURLTemplate;
        }
      });
    }
  }

  var parserUtils = {
    childByName: childByName,
    childrenByName: childrenByName,
    resolveVastAdTagURI: resolveVastAdTagURI,
    parseBoolean: parseBoolean,
    parseNodeText: parseNodeText,
    copyNodeAttribute: copyNodeAttribute,
    parseDuration: parseDuration,
    splitVAST: splitVAST,
    mergeWrapperAdData: mergeWrapperAdData
  };

  /**
   * This module provides methods to parse a VAST CompanionAd Element.
   */

  /**
   * Parses a CompanionAd.
   * @param  {Object} creativeElement - The VAST CompanionAd element to parse.
   * @param  {Object} creativeAttributes - The attributes of the CompanionAd (optional).
   * @return {CreativeCompanion}
   */
  function parseCreativeCompanion(creativeElement, creativeAttributes) {
    var creative = new CreativeCompanion(creativeAttributes);

    parserUtils.childrenByName(creativeElement, 'Companion').forEach(function (companionResource) {
      var companionAd = new CompanionAd();
      companionAd.id = companionResource.getAttribute('id') || null;
      companionAd.width = companionResource.getAttribute('width');
      companionAd.height = companionResource.getAttribute('height');
      companionAd.companionClickTrackingURLTemplates = [];

      parserUtils.childrenByName(companionResource, 'HTMLResource').forEach(function (htmlElement) {
        companionAd.type = htmlElement.getAttribute('creativeType') || 'text/html';
        companionAd.htmlResource = parserUtils.parseNodeText(htmlElement);
      });

      parserUtils.childrenByName(companionResource, 'IFrameResource').forEach(function (iframeElement) {
        companionAd.type = iframeElement.getAttribute('creativeType') || 0;
        companionAd.iframeResource = parserUtils.parseNodeText(iframeElement);
      });

      parserUtils.childrenByName(companionResource, 'StaticResource').forEach(function (staticElement) {
        companionAd.type = staticElement.getAttribute('creativeType') || 0;

        parserUtils.childrenByName(companionResource, 'AltText').forEach(function (child) {
          companionAd.altText = parserUtils.parseNodeText(child);
        });

        companionAd.staticResource = parserUtils.parseNodeText(staticElement);
      });

      parserUtils.childrenByName(companionResource, 'TrackingEvents').forEach(function (trackingEventsElement) {
        parserUtils.childrenByName(trackingEventsElement, 'Tracking').forEach(function (trackingElement) {
          var eventName = trackingElement.getAttribute('event');
          var trackingURLTemplate = parserUtils.parseNodeText(trackingElement);
          if (eventName && trackingURLTemplate) {
            if (!Array.isArray(companionAd.trackingEvents[eventName])) {
              companionAd.trackingEvents[eventName] = [];
            }
            companionAd.trackingEvents[eventName].push(trackingURLTemplate);
          }
        });
      });

      parserUtils.childrenByName(companionResource, 'CompanionClickTracking').forEach(function (clickTrackingElement) {
        companionAd.companionClickTrackingURLTemplates.push(parserUtils.parseNodeText(clickTrackingElement));
      });

      companionAd.companionClickThroughURLTemplate = parserUtils.parseNodeText(parserUtils.childByName(companionResource, 'CompanionClickThrough'));
      companionAd.companionClickTrackingURLTemplate = parserUtils.parseNodeText(parserUtils.childByName(companionResource, 'CompanionClickTracking'));
      creative.variations.push(companionAd);
    });

    return creative;
  }

  var CreativeLinear = function (_Creative) {
    inherits(CreativeLinear, _Creative);

    function CreativeLinear() {
      var creativeAttributes = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
      classCallCheck(this, CreativeLinear);

      var _this = possibleConstructorReturn(this, (CreativeLinear.__proto__ || Object.getPrototypeOf(CreativeLinear)).call(this, creativeAttributes));

      _this.type = 'linear';
      _this.duration = 0;
      _this.skipDelay = null;
      _this.mediaFiles = [];
      _this.videoClickThroughURLTemplate = null;
      _this.videoClickTrackingURLTemplates = [];
      _this.videoCustomClickURLTemplates = [];
      _this.adParameters = null;
      _this.icons = [];
      return _this;
    }

    return CreativeLinear;
  }(Creative);

  var Icon = function Icon() {
    classCallCheck(this, Icon);

    this.program = null;
    this.height = 0;
    this.width = 0;
    this.xPosition = 0;
    this.yPosition = 0;
    this.apiFramework = null;
    this.offset = null;
    this.duration = 0;
    this.type = null;
    this.staticResource = null;
    this.htmlResource = null;
    this.iframeResource = null;
    this.iconClickThroughURLTemplate = null;
    this.iconClickTrackingURLTemplates = [];
    this.iconViewTrackingURLTemplate = null;
  };

  var MediaFile = function MediaFile() {
    classCallCheck(this, MediaFile);

    this.id = null;
    this.fileURL = null;
    this.deliveryType = 'progressive';
    this.mimeType = null;
    this.codec = null;
    this.bitrate = 0;
    this.minBitrate = 0;
    this.maxBitrate = 0;
    this.width = 0;
    this.height = 0;
    this.apiFramework = null;
    this.scalable = null;
    this.maintainAspectRatio = null;
  };

  /**
   * This module provides methods to parse a VAST Linear Element.
   */

  /**
   * Parses a Linear element.
   * @param  {Object} creativeElement - The VAST Linear element to parse.
   * @param  {any} creativeAttributes - The attributes of the Linear (optional).
   * @return {CreativeLinear}
   */
  function parseCreativeLinear(creativeElement, creativeAttributes) {
    var offset = void 0;
    var creative = new CreativeLinear(creativeAttributes);

    creative.duration = parserUtils.parseDuration(parserUtils.parseNodeText(parserUtils.childByName(creativeElement, 'Duration')));
    var skipOffset = creativeElement.getAttribute('skipoffset');

    if (typeof skipOffset === 'undefined' || skipOffset === null) {
      creative.skipDelay = null;
    } else if (skipOffset.charAt(skipOffset.length - 1) === '%' && creative.duration !== -1) {
      var percent = parseInt(skipOffset, 10);
      creative.skipDelay = creative.duration * (percent / 100);
    } else {
      creative.skipDelay = parserUtils.parseDuration(skipOffset);
    }

    var videoClicksElement = parserUtils.childByName(creativeElement, 'VideoClicks');
    if (videoClicksElement) {
      creative.videoClickThroughURLTemplate = parserUtils.parseNodeText(parserUtils.childByName(videoClicksElement, 'ClickThrough'));

      parserUtils.childrenByName(videoClicksElement, 'ClickTracking').forEach(function (clickTrackingElement) {
        creative.videoClickTrackingURLTemplates.push(parserUtils.parseNodeText(clickTrackingElement));
      });

      parserUtils.childrenByName(videoClicksElement, 'CustomClick').forEach(function (customClickElement) {
        creative.videoCustomClickURLTemplates.push(parserUtils.parseNodeText(customClickElement));
      });
    }

    var adParamsElement = parserUtils.childByName(creativeElement, 'AdParameters');
    if (adParamsElement) {
      creative.adParameters = parserUtils.parseNodeText(adParamsElement);
    }

    parserUtils.childrenByName(creativeElement, 'TrackingEvents').forEach(function (trackingEventsElement) {
      parserUtils.childrenByName(trackingEventsElement, 'Tracking').forEach(function (trackingElement) {
        var eventName = trackingElement.getAttribute('event');
        var trackingURLTemplate = parserUtils.parseNodeText(trackingElement);
        if (eventName && trackingURLTemplate) {
          if (eventName === 'progress') {
            offset = trackingElement.getAttribute('offset');
            if (!offset) {
              return;
            }
            if (offset.charAt(offset.length - 1) === '%') {
              eventName = 'progress-' + offset;
            } else {
              eventName = 'progress-' + Math.round(parserUtils.parseDuration(offset));
            }
          }

          if (!Array.isArray(creative.trackingEvents[eventName])) {
            creative.trackingEvents[eventName] = [];
          }
          creative.trackingEvents[eventName].push(trackingURLTemplate);
        }
      });
    });

    parserUtils.childrenByName(creativeElement, 'MediaFiles').forEach(function (mediaFilesElement) {
      parserUtils.childrenByName(mediaFilesElement, 'MediaFile').forEach(function (mediaFileElement) {
        var mediaFile = new MediaFile();
        mediaFile.id = mediaFileElement.getAttribute('id');
        mediaFile.fileURL = parserUtils.parseNodeText(mediaFileElement);
        mediaFile.deliveryType = mediaFileElement.getAttribute('delivery');
        mediaFile.codec = mediaFileElement.getAttribute('codec');
        mediaFile.mimeType = mediaFileElement.getAttribute('type');
        mediaFile.apiFramework = mediaFileElement.getAttribute('apiFramework');
        mediaFile.bitrate = parseInt(mediaFileElement.getAttribute('bitrate') || 0);
        mediaFile.minBitrate = parseInt(mediaFileElement.getAttribute('minBitrate') || 0);
        mediaFile.maxBitrate = parseInt(mediaFileElement.getAttribute('maxBitrate') || 0);
        mediaFile.width = parseInt(mediaFileElement.getAttribute('width') || 0);
        mediaFile.height = parseInt(mediaFileElement.getAttribute('height') || 0);

        var scalable = mediaFileElement.getAttribute('scalable');
        if (scalable && typeof scalable === 'string') {
          scalable = scalable.toLowerCase();
          if (scalable === 'true') {
            mediaFile.scalable = true;
          } else if (scalable === 'false') {
            mediaFile.scalable = false;
          }
        }

        var maintainAspectRatio = mediaFileElement.getAttribute('maintainAspectRatio');
        if (maintainAspectRatio && typeof maintainAspectRatio === 'string') {
          maintainAspectRatio = maintainAspectRatio.toLowerCase();
          if (maintainAspectRatio === 'true') {
            mediaFile.maintainAspectRatio = true;
          } else if (maintainAspectRatio === 'false') {
            mediaFile.maintainAspectRatio = false;
          }
        }

        creative.mediaFiles.push(mediaFile);
      });
    });

    var iconsElement = parserUtils.childByName(creativeElement, 'Icons');
    if (iconsElement) {
      parserUtils.childrenByName(iconsElement, 'Icon').forEach(function (iconElement) {
        var icon = new Icon();
        icon.program = iconElement.getAttribute('program');
        icon.height = parseInt(iconElement.getAttribute('height') || 0);
        icon.width = parseInt(iconElement.getAttribute('width') || 0);
        icon.xPosition = parseXPosition(iconElement.getAttribute('xPosition'));
        icon.yPosition = parseYPosition(iconElement.getAttribute('yPosition'));
        icon.apiFramework = iconElement.getAttribute('apiFramework');
        icon.offset = parserUtils.parseDuration(iconElement.getAttribute('offset'));
        icon.duration = parserUtils.parseDuration(iconElement.getAttribute('duration'));

        parserUtils.childrenByName(iconElement, 'HTMLResource').forEach(function (htmlElement) {
          icon.type = htmlElement.getAttribute('creativeType') || 'text/html';
          icon.htmlResource = parserUtils.parseNodeText(htmlElement);
        });

        parserUtils.childrenByName(iconElement, 'IFrameResource').forEach(function (iframeElement) {
          icon.type = iframeElement.getAttribute('creativeType') || 0;
          icon.iframeResource = parserUtils.parseNodeText(iframeElement);
        });

        parserUtils.childrenByName(iconElement, 'StaticResource').forEach(function (staticElement) {
          icon.type = staticElement.getAttribute('creativeType') || 0;
          icon.staticResource = parserUtils.parseNodeText(staticElement);
        });

        var iconClicksElement = parserUtils.childByName(iconElement, 'IconClicks');
        if (iconClicksElement) {
          icon.iconClickThroughURLTemplate = parserUtils.parseNodeText(parserUtils.childByName(iconClicksElement, 'IconClickThrough'));
          parserUtils.childrenByName(iconClicksElement, 'IconClickTracking').forEach(function (iconClickTrackingElement) {
            icon.iconClickTrackingURLTemplates.push(parserUtils.parseNodeText(iconClickTrackingElement));
          });
        }

        icon.iconViewTrackingURLTemplate = parserUtils.parseNodeText(parserUtils.childByName(iconElement, 'IconViewTracking'));

        creative.icons.push(icon);
      });
    }

    return creative;
  }

  /**
   * Parses an horizontal position into a String ('left' or 'right') or into a Number.
   * @param  {String} xPosition - The x position to parse.
   * @return {String|Number}
   */
  function parseXPosition(xPosition) {
    if (['left', 'right'].indexOf(xPosition) !== -1) {
      return xPosition;
    }

    return parseInt(xPosition || 0);
  }

  /**
   * Parses an vertical position into a String ('top' or 'bottom') or into a Number.
   * @param  {String} yPosition - The x position to parse.
   * @return {String|Number}
   */
  function parseYPosition(yPosition) {
    if (['top', 'bottom'].indexOf(yPosition) !== -1) {
      return yPosition;
    }

    return parseInt(yPosition || 0);
  }

  var CreativeNonLinear = function (_Creative) {
    inherits(CreativeNonLinear, _Creative);

    function CreativeNonLinear() {
      var creativeAttributes = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
      classCallCheck(this, CreativeNonLinear);

      var _this = possibleConstructorReturn(this, (CreativeNonLinear.__proto__ || Object.getPrototypeOf(CreativeNonLinear)).call(this, creativeAttributes));

      _this.type = 'nonlinear';
      _this.variations = [];
      return _this;
    }

    return CreativeNonLinear;
  }(Creative);

  var NonLinearAd = function NonLinearAd() {
    classCallCheck(this, NonLinearAd);

    this.id = null;
    this.width = 0;
    this.height = 0;
    this.expandedWidth = 0;
    this.expandedHeight = 0;
    this.scalable = true;
    this.maintainAspectRatio = true;
    this.minSuggestedDuration = 0;
    this.apiFramework = 'static';
    this.type = null;
    this.staticResource = null;
    this.htmlResource = null;
    this.iframeResource = null;
    this.nonlinearClickThroughURLTemplate = null;
    this.nonlinearClickTrackingURLTemplates = [];
    this.adParameters = null;
  };

  /**
   * This module provides methods to parse a VAST NonLinear Element.
   */

  /**
   * Parses a NonLinear element.
   * @param  {any} creativeElement - The VAST NonLinear element to parse.
   * @param  {any} creativeAttributes - The attributes of the NonLinear (optional).
   * @return {CreativeNonLinear}
   */
  function parseCreativeNonLinear(creativeElement, creativeAttributes) {
    var creative = new CreativeNonLinear(creativeAttributes);

    parserUtils.childrenByName(creativeElement, 'TrackingEvents').forEach(function (trackingEventsElement) {
      var eventName = void 0,
          trackingURLTemplate = void 0;
      parserUtils.childrenByName(trackingEventsElement, 'Tracking').forEach(function (trackingElement) {
        eventName = trackingElement.getAttribute('event');
        trackingURLTemplate = parserUtils.parseNodeText(trackingElement);

        if (eventName && trackingURLTemplate) {
          if (!Array.isArray(creative.trackingEvents[eventName])) {
            creative.trackingEvents[eventName] = [];
          }
          creative.trackingEvents[eventName].push(trackingURLTemplate);
        }
      });
    });

    parserUtils.childrenByName(creativeElement, 'NonLinear').forEach(function (nonlinearResource) {
      var nonlinearAd = new NonLinearAd();
      nonlinearAd.id = nonlinearResource.getAttribute('id') || null;
      nonlinearAd.width = nonlinearResource.getAttribute('width');
      nonlinearAd.height = nonlinearResource.getAttribute('height');
      nonlinearAd.expandedWidth = nonlinearResource.getAttribute('expandedWidth');
      nonlinearAd.expandedHeight = nonlinearResource.getAttribute('expandedHeight');
      nonlinearAd.scalable = parserUtils.parseBoolean(nonlinearResource.getAttribute('scalable'));
      nonlinearAd.maintainAspectRatio = parserUtils.parseBoolean(nonlinearResource.getAttribute('maintainAspectRatio'));
      nonlinearAd.minSuggestedDuration = parserUtils.parseDuration(nonlinearResource.getAttribute('minSuggestedDuration'));
      nonlinearAd.apiFramework = nonlinearResource.getAttribute('apiFramework');

      parserUtils.childrenByName(nonlinearResource, 'HTMLResource').forEach(function (htmlElement) {
        nonlinearAd.type = htmlElement.getAttribute('creativeType') || 'text/html';
        nonlinearAd.htmlResource = parserUtils.parseNodeText(htmlElement);
      });

      parserUtils.childrenByName(nonlinearResource, 'IFrameResource').forEach(function (iframeElement) {
        nonlinearAd.type = iframeElement.getAttribute('creativeType') || 0;
        nonlinearAd.iframeResource = parserUtils.parseNodeText(iframeElement);
      });

      parserUtils.childrenByName(nonlinearResource, 'StaticResource').forEach(function (staticElement) {
        nonlinearAd.type = staticElement.getAttribute('creativeType') || 0;
        nonlinearAd.staticResource = parserUtils.parseNodeText(staticElement);
      });

      var adParamsElement = parserUtils.childByName(nonlinearResource, 'AdParameters');
      if (adParamsElement) {
        nonlinearAd.adParameters = parserUtils.parseNodeText(adParamsElement);
      }

      nonlinearAd.nonlinearClickThroughURLTemplate = parserUtils.parseNodeText(parserUtils.childByName(nonlinearResource, 'NonLinearClickThrough'));
      parserUtils.childrenByName(nonlinearResource, 'NonLinearClickTracking').forEach(function (clickTrackingElement) {
        nonlinearAd.nonlinearClickTrackingURLTemplates.push(parserUtils.parseNodeText(clickTrackingElement));
      });

      creative.variations.push(nonlinearAd);
    });

    return creative;
  }

  /**
   * This module provides methods to parse a VAST Ad Element.
   */

  /**
   * Parses an Ad element (can either be a Wrapper or an InLine).
   * @param  {Object} adElement - The VAST Ad element to parse.
   * @return {Ad}
   */
  function parseAd(adElement) {
    var childNodes = adElement.childNodes;

    for (var adTypeElementKey in childNodes) {
      var adTypeElement = childNodes[adTypeElementKey];

      if (['Wrapper', 'InLine'].indexOf(adTypeElement.nodeName) === -1) {
        continue;
      }

      parserUtils.copyNodeAttribute('id', adElement, adTypeElement);
      parserUtils.copyNodeAttribute('sequence', adElement, adTypeElement);

      if (adTypeElement.nodeName === 'Wrapper') {
        return parseWrapper(adTypeElement);
      } else if (adTypeElement.nodeName === 'InLine') {
        return parseInLine(adTypeElement);
      }
    }
  }

  /**
   * Parses an Inline element.
   * @param  {Object} inLineElement - The VAST Inline element to parse.
   * @return {Ad}
   */
  function parseInLine(inLineElement) {
    var childNodes = inLineElement.childNodes;
    var ad = new Ad();
    ad.id = inLineElement.getAttribute('id') || null;
    ad.sequence = inLineElement.getAttribute('sequence') || null;

    for (var nodeKey in childNodes) {
      var node = childNodes[nodeKey];

      switch (node.nodeName) {
        case 'Error':
          ad.errorURLTemplates.push(parserUtils.parseNodeText(node));
          break;

        case 'Impression':
          ad.impressionURLTemplates.push(parserUtils.parseNodeText(node));
          break;

        case 'Creatives':
          parserUtils.childrenByName(node, 'Creative').forEach(function (creativeElement) {
            var creativeAttributes = {
              id: creativeElement.getAttribute('id') || null,
              adId: parseCreativeAdIdAttribute(creativeElement),
              sequence: creativeElement.getAttribute('sequence') || null,
              apiFramework: creativeElement.getAttribute('apiFramework') || null
            };

            for (var creativeTypeElementKey in creativeElement.childNodes) {
              var creativeTypeElement = creativeElement.childNodes[creativeTypeElementKey];
              var parsedCreative = void 0;

              switch (creativeTypeElement.nodeName) {
                case 'Linear':
                  parsedCreative = parseCreativeLinear(creativeTypeElement, creativeAttributes);
                  if (parsedCreative) {
                    ad.creatives.push(parsedCreative);
                  }
                  break;
                case 'NonLinearAds':
                  parsedCreative = parseCreativeNonLinear(creativeTypeElement, creativeAttributes);
                  if (parsedCreative) {
                    ad.creatives.push(parsedCreative);
                  }
                  break;
                case 'CompanionAds':
                  parsedCreative = parseCreativeCompanion(creativeTypeElement, creativeAttributes);
                  if (parsedCreative) {
                    ad.creatives.push(parsedCreative);
                  }
                  break;
              }
            }
          });
          break;

        case 'Extensions':
          parseExtensions(ad.extensions, parserUtils.childrenByName(node, 'Extension'));
          break;

        case 'AdSystem':
          ad.system = {
            value: parserUtils.parseNodeText(node),
            version: node.getAttribute('version') || null
          };
          break;

        case 'AdTitle':
          ad.title = parserUtils.parseNodeText(node);
          break;

        case 'Description':
          ad.description = parserUtils.parseNodeText(node);
          break;

        case 'Advertiser':
          ad.advertiser = parserUtils.parseNodeText(node);
          break;

        case 'Pricing':
          ad.pricing = {
            value: parserUtils.parseNodeText(node),
            model: node.getAttribute('model') || null,
            currency: node.getAttribute('currency') || null
          };
          break;

        case 'Survey':
          ad.survey = parserUtils.parseNodeText(node);
          break;
      }
    }

    return ad;
  }

  /**
   * Parses a Wrapper element without resolving the wrapped urls.
   * @param  {Object} wrapperElement - The VAST Wrapper element to be parsed.
   * @return {Ad}
   */
  function parseWrapper(wrapperElement) {
    var ad = parseInLine(wrapperElement);
    var wrapperURLElement = parserUtils.childByName(wrapperElement, 'VASTAdTagURI');

    if (wrapperURLElement) {
      ad.nextWrapperURL = parserUtils.parseNodeText(wrapperURLElement);
    } else {
      wrapperURLElement = parserUtils.childByName(wrapperElement, 'VASTAdTagURL');

      if (wrapperURLElement) {
        ad.nextWrapperURL = parserUtils.parseNodeText(parserUtils.childByName(wrapperURLElement, 'URL'));
      }
    }

    ad.creatives.forEach(function (wrapperCreativeElement) {
      if (['linear', 'nonlinear'].indexOf(wrapperCreativeElement.type) !== -1) {
        // TrackingEvents Linear / NonLinear
        if (wrapperCreativeElement.trackingEvents) {
          if (!ad.trackingEvents) {
            ad.trackingEvents = {};
          }
          if (!ad.trackingEvents[wrapperCreativeElement.type]) {
            ad.trackingEvents[wrapperCreativeElement.type] = {};
          }

          var _loop = function _loop(eventName) {
            var urls = wrapperCreativeElement.trackingEvents[eventName];
            if (!Array.isArray(ad.trackingEvents[wrapperCreativeElement.type][eventName])) {
              ad.trackingEvents[wrapperCreativeElement.type][eventName] = [];
            }
            urls.forEach(function (url) {
              ad.trackingEvents[wrapperCreativeElement.type][eventName].push(url);
            });
          };

          for (var eventName in wrapperCreativeElement.trackingEvents) {
            _loop(eventName);
          }
        }
        // ClickTracking
        if (wrapperCreativeElement.videoClickTrackingURLTemplates) {
          if (!Array.isArray(ad.videoClickTrackingURLTemplates)) {
            ad.videoClickTrackingURLTemplates = [];
          } // tmp property to save wrapper tracking URLs until they are merged
          wrapperCreativeElement.videoClickTrackingURLTemplates.forEach(function (item) {
            ad.videoClickTrackingURLTemplates.push(item);
          });
        }
        // ClickThrough
        if (wrapperCreativeElement.videoClickThroughURLTemplate) {
          ad.videoClickThroughURLTemplate = wrapperCreativeElement.videoClickThroughURLTemplate;
        }
        // CustomClick
        if (wrapperCreativeElement.videoCustomClickURLTemplates) {
          if (!Array.isArray(ad.videoCustomClickURLTemplates)) {
            ad.videoCustomClickURLTemplates = [];
          } // tmp property to save wrapper tracking URLs until they are merged
          wrapperCreativeElement.videoCustomClickURLTemplates.forEach(function (item) {
            ad.videoCustomClickURLTemplates.push(item);
          });
        }
      }
    });

    if (ad.nextWrapperURL) {
      return ad;
    }
  }

  /**
   * Parses an array of Extension elements.
   * @param  {Array} collection - The array used to store the parsed extensions.
   * @param  {Array} extensions - The array of extensions to parse.
   */
  function parseExtensions(collection, extensions) {
    extensions.forEach(function (extNode) {
      var ext = new AdExtension();
      var extNodeAttrs = extNode.attributes;
      var childNodes = extNode.childNodes;

      if (extNode.attributes) {
        for (var extNodeAttrKey in extNodeAttrs) {
          var extNodeAttr = extNodeAttrs[extNodeAttrKey];

          if (extNodeAttr.nodeName && extNodeAttr.nodeValue) {
            ext.attributes[extNodeAttr.nodeName] = extNodeAttr.nodeValue;
          }
        }
      }

      for (var childNodeKey in childNodes) {
        var childNode = childNodes[childNodeKey];
        var txt = parserUtils.parseNodeText(childNode);

        // ignore comments / empty value
        if (childNode.nodeName !== '#comment' && txt !== '') {
          var extChild = new AdExtensionChild();
          extChild.name = childNode.nodeName;
          extChild.value = txt;

          if (childNode.attributes) {
            var childNodeAttributes = childNode.attributes;

            for (var extChildNodeAttrKey in childNodeAttributes) {
              var extChildNodeAttr = childNodeAttributes[extChildNodeAttrKey];

              extChild.attributes[extChildNodeAttr.nodeName] = extChildNodeAttr.nodeValue;
            }
          }

          ext.children.push(extChild);
        }
      }

      collection.push(ext);
    });
  }

  /**
   * Parses the creative adId Attribute.
   * @param  {any} creativeElement - The creative element to retrieve the adId from.
   * @return {String|null}
   */
  function parseCreativeAdIdAttribute(creativeElement) {
    return creativeElement.getAttribute('AdID') || // VAST 2 spec
    creativeElement.getAttribute('adID') || // VAST 3 spec
    creativeElement.getAttribute('adId') || // VAST 4 spec
    null;
  }

  var domain;

  // This constructor is used to store event handlers. Instantiating this is
  // faster than explicitly calling `Object.create(null)` to get a "clean" empty
  // object (tested with v8 v4.9).
  function EventHandlers() {}
  EventHandlers.prototype = Object.create(null);

  function EventEmitter() {
    EventEmitter.init.call(this);
  }

  // nodejs oddity
  // require('events') === require('events').EventEmitter
  EventEmitter.EventEmitter = EventEmitter;

  EventEmitter.usingDomains = false;

  EventEmitter.prototype.domain = undefined;
  EventEmitter.prototype._events = undefined;
  EventEmitter.prototype._maxListeners = undefined;

  // By default EventEmitters will print a warning if more than 10 listeners are
  // added to it. This is a useful default which helps finding memory leaks.
  EventEmitter.defaultMaxListeners = 10;

  EventEmitter.init = function() {
    this.domain = null;
    if (EventEmitter.usingDomains) {
      // if there is an active domain, then attach to it.
      if (domain.active && !(this instanceof domain.Domain)) {
        this.domain = domain.active;
      }
    }

    if (!this._events || this._events === Object.getPrototypeOf(this)._events) {
      this._events = new EventHandlers();
      this._eventsCount = 0;
    }

    this._maxListeners = this._maxListeners || undefined;
  };

  // Obviously not all Emitters should be limited to 10. This function allows
  // that to be increased. Set to zero for unlimited.
  EventEmitter.prototype.setMaxListeners = function setMaxListeners(n) {
    if (typeof n !== 'number' || n < 0 || isNaN(n))
      throw new TypeError('"n" argument must be a positive number');
    this._maxListeners = n;
    return this;
  };

  function $getMaxListeners(that) {
    if (that._maxListeners === undefined)
      return EventEmitter.defaultMaxListeners;
    return that._maxListeners;
  }

  EventEmitter.prototype.getMaxListeners = function getMaxListeners() {
    return $getMaxListeners(this);
  };

  // These standalone emit* functions are used to optimize calling of event
  // handlers for fast cases because emit() itself often has a variable number of
  // arguments and can be deoptimized because of that. These functions always have
  // the same number of arguments and thus do not get deoptimized, so the code
  // inside them can execute faster.
  function emitNone(handler, isFn, self) {
    if (isFn)
      handler.call(self);
    else {
      var len = handler.length;
      var listeners = arrayClone(handler, len);
      for (var i = 0; i < len; ++i)
        listeners[i].call(self);
    }
  }
  function emitOne(handler, isFn, self, arg1) {
    if (isFn)
      handler.call(self, arg1);
    else {
      var len = handler.length;
      var listeners = arrayClone(handler, len);
      for (var i = 0; i < len; ++i)
        listeners[i].call(self, arg1);
    }
  }
  function emitTwo(handler, isFn, self, arg1, arg2) {
    if (isFn)
      handler.call(self, arg1, arg2);
    else {
      var len = handler.length;
      var listeners = arrayClone(handler, len);
      for (var i = 0; i < len; ++i)
        listeners[i].call(self, arg1, arg2);
    }
  }
  function emitThree(handler, isFn, self, arg1, arg2, arg3) {
    if (isFn)
      handler.call(self, arg1, arg2, arg3);
    else {
      var len = handler.length;
      var listeners = arrayClone(handler, len);
      for (var i = 0; i < len; ++i)
        listeners[i].call(self, arg1, arg2, arg3);
    }
  }

  function emitMany(handler, isFn, self, args) {
    if (isFn)
      handler.apply(self, args);
    else {
      var len = handler.length;
      var listeners = arrayClone(handler, len);
      for (var i = 0; i < len; ++i)
        listeners[i].apply(self, args);
    }
  }

  EventEmitter.prototype.emit = function emit(type) {
    var er, handler, len, args, i, events, domain;
    var needDomainExit = false;
    var doError = (type === 'error');

    events = this._events;
    if (events)
      doError = (doError && events.error == null);
    else if (!doError)
      return false;

    domain = this.domain;

    // If there is no 'error' event listener then throw.
    if (doError) {
      er = arguments[1];
      if (domain) {
        if (!er)
          er = new Error('Uncaught, unspecified "error" event');
        er.domainEmitter = this;
        er.domain = domain;
        er.domainThrown = false;
        domain.emit('error', er);
      } else if (er instanceof Error) {
        throw er; // Unhandled 'error' event
      } else {
        // At least give some kind of context to the user
        var err = new Error('Uncaught, unspecified "error" event. (' + er + ')');
        err.context = er;
        throw err;
      }
      return false;
    }

    handler = events[type];

    if (!handler)
      return false;

    var isFn = typeof handler === 'function';
    len = arguments.length;
    switch (len) {
      // fast cases
      case 1:
        emitNone(handler, isFn, this);
        break;
      case 2:
        emitOne(handler, isFn, this, arguments[1]);
        break;
      case 3:
        emitTwo(handler, isFn, this, arguments[1], arguments[2]);
        break;
      case 4:
        emitThree(handler, isFn, this, arguments[1], arguments[2], arguments[3]);
        break;
      // slower
      default:
        args = new Array(len - 1);
        for (i = 1; i < len; i++)
          args[i - 1] = arguments[i];
        emitMany(handler, isFn, this, args);
    }

    if (needDomainExit)
      domain.exit();

    return true;
  };

  function _addListener(target, type, listener, prepend) {
    var m;
    var events;
    var existing;

    if (typeof listener !== 'function')
      throw new TypeError('"listener" argument must be a function');

    events = target._events;
    if (!events) {
      events = target._events = new EventHandlers();
      target._eventsCount = 0;
    } else {
      // To avoid recursion in the case that type === "newListener"! Before
      // adding it to the listeners, first emit "newListener".
      if (events.newListener) {
        target.emit('newListener', type,
                    listener.listener ? listener.listener : listener);

        // Re-assign `events` because a newListener handler could have caused the
        // this._events to be assigned to a new object
        events = target._events;
      }
      existing = events[type];
    }

    if (!existing) {
      // Optimize the case of one listener. Don't need the extra array object.
      existing = events[type] = listener;
      ++target._eventsCount;
    } else {
      if (typeof existing === 'function') {
        // Adding the second element, need to change to array.
        existing = events[type] = prepend ? [listener, existing] :
                                            [existing, listener];
      } else {
        // If we've already got an array, just append.
        if (prepend) {
          existing.unshift(listener);
        } else {
          existing.push(listener);
        }
      }

      // Check for listener leak
      if (!existing.warned) {
        m = $getMaxListeners(target);
        if (m && m > 0 && existing.length > m) {
          existing.warned = true;
          var w = new Error('Possible EventEmitter memory leak detected. ' +
                              existing.length + ' ' + type + ' listeners added. ' +
                              'Use emitter.setMaxListeners() to increase limit');
          w.name = 'MaxListenersExceededWarning';
          w.emitter = target;
          w.type = type;
          w.count = existing.length;
          emitWarning(w);
        }
      }
    }

    return target;
  }
  function emitWarning(e) {
    typeof console.warn === 'function' ? console.warn(e) : console.log(e);
  }
  EventEmitter.prototype.addListener = function addListener(type, listener) {
    return _addListener(this, type, listener, false);
  };

  EventEmitter.prototype.on = EventEmitter.prototype.addListener;

  EventEmitter.prototype.prependListener =
      function prependListener(type, listener) {
        return _addListener(this, type, listener, true);
      };

  function _onceWrap(target, type, listener) {
    var fired = false;
    function g() {
      target.removeListener(type, g);
      if (!fired)