var H5P = H5P || {}; // Create object where external code may register and listen for H5P Events H5P.externalDispatcher = new H5P.EventDispatcher(); if (H5P.isFramed && H5P.externalEmbed === false) { H5P.externalDispatcher.on('xAPI', window.top.H5P.externalDispatcher.trigger); } // EventDispatcher extensions /** * Helper function for triggering xAPI added to the EventDispatcher * * @param {string} verb - the short id of the verb we want to trigger * @param {oject} extra - extra properties for the xAPI statement */ H5P.EventDispatcher.prototype.triggerXAPI = function(verb, extra) { this.trigger(this.createXAPIEventTemplate(verb, extra)); }; /** * Helper function to create event templates added to the EventDispatcher * * Will in the future be used to add representations of the questions to the * statements. * * @param {string} verb - verb id in short form * @param {object} extra - Extra values to be added to the statement * @returns {Function} - XAPIEvent object */ H5P.EventDispatcher.prototype.createXAPIEventTemplate = function(verb, extra) { var event = new H5P.XAPIEvent(); event.setActor(); event.setVerb(verb); if (extra !== undefined) { for (var i in extra) { event.data.statement[i] = extra[i]; } } if (!('object' in event.data.statement)) { event.setObject(this); } if (!('context' in event.data.statement)) { event.setContext(this); } return event; }; /** * Helper function to create xAPI completed events * * @param {int} score - will be set as the 'raw' value of the score object * @param {int} maxScore - will be set as the "max" value of the score object */ H5P.EventDispatcher.prototype.triggerXAPICompleted = function(score, maxScore) { var event = this.createXAPIEventTemplate('completed'); event.setScoredResult(score, maxScore); this.trigger(event); }; /** * Internal H5P function listening for xAPI completed events and stores scores * * @param {function} event - xAPI event */ H5P.xAPICompletedListener = function(event) { var statement = event.data.statement; if ('verb' in statement) { if (statement.verb.id === 'http://adlnet.gov/expapi/verbs/completed') { var score = statement.result.score.raw; var maxScore = statement.result.score.max; var contentId = statement.object.extensions['http://h5p.org/x-api/h5p-local-content-id']; H5P.setFinished(contentId, score, maxScore); } } };