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var H5P = window.H5P = window.H5P || {};
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/**
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 * The external event dispatcher. Others, outside of H5P may register and
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 * listen for H5P Events here.
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 *
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 * @type {H5P.EventDispatcher}
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 */
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H5P.externalDispatcher = new H5P.EventDispatcher();
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// EventDispatcher extensions
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/**
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 * Helper function for triggering xAPI added to the EventDispatcher.
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 *
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 * @param {string} verb
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 *   The short id of the verb we want to trigger
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 * @param {Oject} [extra]
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 *   Extra properties for the xAPI statement
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 */
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H5P.EventDispatcher.prototype.triggerXAPI = function (verb, extra) {
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  this.trigger(this.createXAPIEventTemplate(verb, extra));
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};
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/**
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 * Helper function to create event templates added to the EventDispatcher.
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 *
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 * Will in the future be used to add representations of the questions to the
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 * statements.
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 *
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 * @param {string} verb
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 *   Verb id in short form
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 * @param {Object} [extra]
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 *   Extra values to be added to the statement
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 * @returns {H5P.XAPIEvent}
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 *   Instance
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 */
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H5P.EventDispatcher.prototype.createXAPIEventTemplate = function (verb, extra) {
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  var event = new H5P.XAPIEvent();
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  event.setActor();
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  event.setVerb(verb);
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  if (extra !== undefined) {
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    for (var i in extra) {
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      event.data.statement[i] = extra[i];
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    }
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  }
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  if (!('object' in event.data.statement)) {
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    event.setObject(this);
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  }
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  if (!('context' in event.data.statement)) {
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    event.setContext(this);
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  }
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  return event;
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};
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/**
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 * Helper function to create xAPI completed events
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 *
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 * DEPRECATED - USE triggerXAPIScored instead
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 *
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 * @deprecated
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 *   since 1.5, use triggerXAPIScored instead.
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 * @param {number} score
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 *   Will be set as the 'raw' value of the score object
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 * @param {number} maxScore
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 *   will be set as the "max" value of the score object
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 * @param {boolean} success
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 *   will be set as the "success" value of the result object
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 */
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H5P.EventDispatcher.prototype.triggerXAPICompleted = function (score, maxScore, success) {
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  this.triggerXAPIScored(score, maxScore, 'completed', true, success);
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};
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/**
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 * Helper function to create scored xAPI events
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 *
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 * @param {number} score
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 *   Will be set as the 'raw' value of the score object
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 * @param {number} maxScore
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 *   Will be set as the "max" value of the score object
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 * @param {string} verb
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 *   Short form of adl verb
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 * @param {boolean} completion
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 *   Is this a statement from a completed activity?
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 * @param {boolean} success
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 *   Is this a statement from an activity that was done successfully?
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 */
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H5P.EventDispatcher.prototype.triggerXAPIScored = function (score, maxScore, verb, completion, success) {
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  var event = this.createXAPIEventTemplate(verb);
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  event.setScoredResult(score, maxScore, this, completion, success);
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  this.trigger(event);
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};
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H5P.EventDispatcher.prototype.setActivityStarted = function () {
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  if (this.activityStartTime === undefined) {
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    // Don't trigger xAPI events in the editor
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    if (this.contentId !== undefined &&
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        H5PIntegration.contents !== undefined &&
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        H5PIntegration.contents['cid-' + this.contentId] !== undefined) {
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      this.triggerXAPI('attempted');
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    }
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    this.activityStartTime = Date.now();
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  }
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};
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/**
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 * Internal H5P function listening for xAPI completed events and stores scores
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 *
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 * @param {H5P.XAPIEvent} event
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 */
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H5P.xAPICompletedListener = function (event) {
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  if ((event.getVerb() === 'completed' || event.getVerb() === 'answered') && !event.getVerifiedStatementValue(['context', 'contextActivities', 'parent'])) {
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    var score = event.getScore();
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    var maxScore = event.getMaxScore();
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    var contentId = event.getVerifiedStatementValue(['object', 'definition', 'extensions', 'http://h5p.org/x-api/h5p-local-content-id']);
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    H5P.setFinished(contentId, score, maxScore);
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  }
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};