75 lines
2.4 KiB
JavaScript
75 lines
2.4 KiB
JavaScript
var H5P = H5P || {};
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// Create object where external code may register and listen for H5P Events
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H5P.externalDispatcher = new H5P.EventDispatcher();
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if (window.top !== window.self && window.top.H5P !== undefined && window.top.H5P.externalDispatcher !== undefined) {
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H5P.externalDispatcher.on('xAPI', window.top.H5P.externalDispatcher.trigger);
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}
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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 - the short id of the verb we want to trigger
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* @param {oject} extra - 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 - verb id in short form
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* @param {object} extra - Extra values to be added to the statement
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* @returns {Function} - XAPIEvent object
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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)) {
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event.setObject(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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* @param {int} score - will be set as the 'raw' value of the score object
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* @param {int} maxScore - will be set as the "max" value of the score object
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*/
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H5P.EventDispatcher.prototype.triggerXAPICompleted = function(score, maxScore) {
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var event = this.createXAPIEventTemplate('completed');
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event.setScoredResult(score, maxScore);
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this.trigger(event);
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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 {function} event - xAPI event
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*/
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H5P.xAPICompletedListener = function(event) {
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var statement = event.data.statement;
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if ('verb' in statement) {
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if (statement.verb.id === 'http://adlnet.gov/expapi/verbs/completed') {
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var score = statement.result.score.raw;
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var maxScore = statement.result.score.max;
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var contentId = statement.object.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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}
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}; |