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<title>JSDoc: Source: data/ExperimentHandler.js</title>
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<h1 class="page-title">Source: data/ExperimentHandler.js</h1>
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<pre class="prettyprint source linenums"><code>/**
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* Experiment Handler
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*
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* @author Alain Pitiot
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* @version 2021.2.0
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* @copyright (c) 2017-2020 Ilixa Ltd. (http://ilixa.com) (c) 2020-2021 Open Science Tools Ltd. (https://opensciencetools.org)
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* @license Distributed under the terms of the MIT License
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*/
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import * as XLSX from 'xlsx';
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import {PsychObject} from '../util/PsychObject';
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import {MonotonicClock} from '../util/Clock';
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import * as util from '../util/Util';
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/**
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* <p>An ExperimentHandler keeps track of multiple loops and handlers. It is particularly useful
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* for generating a single data file from an experiment with many different loops (e.g. interleaved
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* staircases or loops within loops.</p>
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*
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* @name module:data.ExperimentHandler
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* @class
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* @extends PsychObject
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* @param {Object} options
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* @param {module:core.PsychoJS} options.psychoJS - the PsychoJS instance
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* @param {string} options.name - name of the experiment
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* @param {Object} options.extraInfo - additional information, such as session name, participant name, etc.
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*/
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export class ExperimentHandler extends PsychObject
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{
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/**
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* Getter for experimentEnded.
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*
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* @name module:core.Window#experimentEnded
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* @function
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* @public
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*/
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get experimentEnded()
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{
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return this._experimentEnded;
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}
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/**
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* Setter for experimentEnded.
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*
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* @name module:core.Window#experimentEnded
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* @function
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* @public
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*/
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set experimentEnded(ended)
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{
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this._experimentEnded = ended;
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}
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/**
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* Legacy experiment getters.
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*/
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get _thisEntry()
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{
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return this._currentTrialData;
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}
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get _entries()
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{
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return this._trialsData;
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}
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constructor({
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psychoJS,
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name,
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extraInfo
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} = {})
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{
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super(psychoJS, name);
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this._addAttribute('extraInfo', extraInfo);
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// loop handlers:
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this._loops = [];
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this._unfinishedLoops = [];
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// data dictionaries (one per trial) and current data dictionary:
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this._trialsKeys = [];
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this._trialsData = [];
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this._currentTrialData = {};
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this._experimentEnded = false;
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}
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/**
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* Whether or not the current entry (i.e. trial data) is empty.
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* <p>Note: this is mostly useful at the end of an experiment, in order to ensure that the last entry is saved.</p>
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*
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* @name module:data.ExperimentHandler#isEntryEmpty
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* @function
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* @public
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* @returns {boolean} whether or not the current entry is empty
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*/
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isEntryEmpty()
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{
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return (Object.keys(this._currentTrialData).length > 0);
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}
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/**
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* Add a loop.
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*
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* <p> The loop might be a {@link TrialHandler}, for instance.</p>
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* <p> Data from this loop will be included in the resulting data files.</p>
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*
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* @name module:data.ExperimentHandler#addLoop
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* @function
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* @public
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* @param {Object} loop - the loop, e.g. an instance of TrialHandler or StairHandler
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*/
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addLoop(loop)
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{
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this._loops.push(loop);
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this._unfinishedLoops.push(loop);
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loop.experimentHandler = this;
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}
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/**
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* Remove the given loop from the list of unfinished loops, e.g. when it has completed.
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*
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* @name module:data.ExperimentHandler#removeLoop
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* @function
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* @public
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* @param {Object} loop - the loop, e.g. an instance of TrialHandler or StairHandler
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*/
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removeLoop(loop)
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{
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const index = this._unfinishedLoops.indexOf(loop);
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if (index !== -1)
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{
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this._unfinishedLoops.splice(index, 1);
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}
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}
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/**
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* Add the key/value pair.
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*
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* <p> Multiple key/value pairs can be added to any given entry of the data file. There are
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* considered part of the same entry until a call to {@link nextEntry} is made. </p>
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*
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* @name module:data.ExperimentHandler#addData
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* @function
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* @public
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* @param {Object} key - the key
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* @param {Object} value - the value
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*/
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addData(key, value)
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{
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if (this._trialsKeys.indexOf(key) === -1)
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{
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this._trialsKeys.push(key);
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}
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// turn arrays into their json equivalent:
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if (Array.isArray(value))
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{
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value = JSON.stringify(value);
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}
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this._currentTrialData[key] = value;
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}
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/**
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* Inform this ExperimentHandler that the current trial has ended. Further calls to {@link addData}
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* will be associated with the next trial.
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*
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* @name module:data.ExperimentHandler#nextEntry
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* @function
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* @public
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* @param {Object[]} snapshots - array of loop snapshots
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*/
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nextEntry(snapshots)
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{
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if (typeof snapshots !== 'undefined')
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{
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// turn single snapshot into a one-element array:
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if (!Array.isArray(snapshots))
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{
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snapshots = [snapshots];
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}
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for (const snapshot of snapshots)
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{
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const attributes = ExperimentHandler._getLoopAttributes(snapshot);
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for (let a in attributes)
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{
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if (attributes.hasOwnProperty(a))
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{
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this._currentTrialData[a] = attributes[a];
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}
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}
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}
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}
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// this is to support legacy generated JavaScript code and does not properly handle
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// loops within loops:
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else
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{
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for (const loop of this._unfinishedLoops)
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{
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const attributes = ExperimentHandler._getLoopAttributes(loop);
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for (const a in attributes)
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{
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if (attributes.hasOwnProperty(a))
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{
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this._currentTrialData[a] = attributes[a];
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}
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}
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}
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}
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// add the extraInfo dict to the data:
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for (let a in this.extraInfo)
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{
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if (this.extraInfo.hasOwnProperty(a))
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{
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this._currentTrialData[a] = this.extraInfo[a];
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}
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}
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this._trialsData.push(this._currentTrialData);
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this._currentTrialData = {};
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}
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/**
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* Save the results of the experiment.
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*
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* <ul>
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* <li>For an experiment running locally, the results are offered for immediate download.</li>
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* <li>For an experiment running on the server, the results are uploaded to the server.</li>
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* </ul>
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* <p>
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*
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* @name module:data.ExperimentHandler#save
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* @function
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* @public
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* @param {Object} options
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* @param {Array.<Object>} [options.attributes] - the attributes to be saved
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* @param {Array.<Object>} [options.sync] - whether or not to communicate with the server in a synchronous manner
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*/
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async save({
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attributes = [],
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sync = false
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} = {})
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{
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this._psychoJS.logger.info('[PsychoJS] Save experiment results.');
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// (*) get attributes:
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if (attributes.length === 0)
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{
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attributes = this._trialsKeys.slice();
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for (let l = 0; l < this._loops.length; l++)
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{
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const loop = this._loops[l];
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const loopAttributes = ExperimentHandler._getLoopAttributes(loop);
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for (let a in loopAttributes)
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{
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if (loopAttributes.hasOwnProperty(a))
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{
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attributes.push(a);
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}
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}
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}
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for (let a in this.extraInfo)
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{
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if (this.extraInfo.hasOwnProperty(a))
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{
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attributes.push(a);
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}
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}
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}
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// (*) get various experiment info:
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const info = this.extraInfo;
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const __experimentName = (typeof info.expName !== 'undefined') ? info.expName : this.psychoJS.config.experiment.name;
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const __participant = ((typeof info.participant === 'string' && info.participant.length > 0) ? info.participant : 'PARTICIPANT');
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const __session = ((typeof info.session === 'string' && info.session.length > 0) ? info.session : 'SESSION');
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const __datetime = ((typeof info.date !== 'undefined') ? info.date : MonotonicClock.getDateStr());
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const gitlabConfig = this._psychoJS.config.gitlab;
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const __projectId = (typeof gitlabConfig !== 'undefined' && typeof gitlabConfig.projectId !== 'undefined') ? gitlabConfig.projectId : undefined;
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// (*) save to a .csv file:
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if (this._psychoJS.config.experiment.saveFormat === ExperimentHandler.SaveFormat.CSV)
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{
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// note: we use the XLSX library as it automatically deals with header, takes care of quotes,
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// newlines, etc.
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const worksheet = XLSX.utils.json_to_sheet(this._trialsData);
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// prepend BOM
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const csv = '\ufeff' + XLSX.utils.sheet_to_csv(worksheet);
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// upload data to the pavlovia server or offer them for download:
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const key = __participant + '_' + __experimentName + '_' + __datetime + '.csv';
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if (this._psychoJS.getEnvironment() === ExperimentHandler.Environment.SERVER &&
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this._psychoJS.config.experiment.status === 'RUNNING' &&
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!this._psychoJS._serverMsg.has('__pilotToken'))
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{
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return /*await*/ this._psychoJS.serverManager.uploadData(key, csv, sync);
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}
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else
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{
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util.offerDataForDownload(key, csv, 'text/csv');
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}
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}
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// (*) save in the database on the remote server:
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else if (this._psychoJS.config.experiment.saveFormat === ExperimentHandler.SaveFormat.DATABASE)
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{
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let documents = [];
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for (let r = 0; r < this._trialsData.length; r++)
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{
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let doc = {__projectId, __experimentName, __participant, __session, __datetime};
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for (let h = 0; h < attributes.length; h++)
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{
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doc[attributes[h]] = this._trialsData[r][attributes[h]];
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}
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documents.push(doc);
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}
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// upload data to the pavlovia server or offer them for download:
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if (this._psychoJS.getEnvironment() === ExperimentHandler.Environment.SERVER &&
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this._psychoJS.config.experiment.status === 'RUNNING' &&
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!this._psychoJS._serverMsg.has('__pilotToken'))
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{
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const key = 'results'; // name of the mongoDB collection
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return /*await*/ this._psychoJS.serverManager.uploadData(key, JSON.stringify(documents), sync);
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}
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else
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{
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util.offerDataForDownload('results.json', JSON.stringify(documents), 'application/json');
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}
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}
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}
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/**
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* Get the attribute names and values for the current trial of a given loop.
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* <p> Only info relating to the trial execution are returned.</p>
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*
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* @name module:data.ExperimentHandler#_getLoopAttributes
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* @function
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* @static
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* @protected
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* @param {Object} loop - the loop
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*/
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static _getLoopAttributes(loop)
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{
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// standard trial attributes:
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const properties = ['thisRepN', 'thisTrialN', 'thisN', 'thisIndex', 'stepSizeCurrent', 'ran', 'order'];
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let attributes = {};
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const loopName = loop.name;
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for (const loopProperty in loop)
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{
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if (properties.includes(loopProperty))
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{
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const key = (loopProperty === 'stepSizeCurrent') ? loopName + '.stepSize' : loopName + '.' + loopProperty;
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attributes[key] = loop[loopProperty];
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}
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}
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// specific trial attributes:
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if (typeof loop.getCurrentTrial === 'function')
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{
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const currentTrial = loop.getCurrentTrial();
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for (const trialProperty in currentTrial)
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{
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attributes[trialProperty] = currentTrial[trialProperty];
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}
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}
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/* TODO
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// method of constants
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if hasattr(loop, 'thisTrial'):
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trial = loop.thisTrial
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if hasattr(trial,'items'):#is a TrialList object or a simple dict
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for property,val in trial.items():
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if property not in self._paramNamesSoFar:
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self._paramNamesSoFar.append(property)
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names.append(property)
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vals.append(val)
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elif trial==[]:#we haven't had 1st trial yet? Not actually sure why this occasionally happens (JWP)
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pass
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else:
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names.append(loopName+'.thisTrial')
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vals.append(trial)
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// single StairHandler
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elif hasattr(loop, 'intensities'):
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names.append(loopName+'.intensity')
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if len(loop.intensities)>0:
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vals.append(loop.intensities[-1])
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else:
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vals.append(None)*/
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return attributes;
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}
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}
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/**
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* Experiment result format
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*
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* @name module:core.ServerManager#SaveFormat
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* @enum {Symbol}
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* @readonly
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* @public
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*/
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ExperimentHandler.SaveFormat = {
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/**
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* Results are saved to a .csv file
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*/
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CSV: Symbol.for('CSV'),
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/**
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* Results are saved to a database
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*/
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DATABASE: Symbol.for('DATABASE')
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};
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/**
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* Experiment environment.
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*
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* @enum {Symbol}
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* @readonly
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* @public
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*/
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ExperimentHandler.Environment = {
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SERVER: Symbol.for('SERVER'),
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LOCAL: Symbol.for('LOCAL')
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};
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</code></pre>
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</article>
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</section>
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</div>
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<nav>
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<h2><a href="index.html">Home</a></h2><h3>Modules</h3><ul><li><a href="module-core.html">core</a></li><li><a href="module-data.html">data</a></li><li><a href="module-sound.html">sound</a></li><li><a href="module-util.html">util</a></li><li><a href="module-visual.html">visual</a></li></ul><h3>Classes</h3><ul><li><a href="module-core.BuilderKeyResponse.html">BuilderKeyResponse</a></li><li><a href="module-core.EventManager.html">EventManager</a></li><li><a href="module-core.GUI.html">GUI</a></li><li><a href="module-core.Keyboard.html">Keyboard</a></li><li><a href="module-core.KeyPress.html">KeyPress</a></li><li><a href="module-core.Logger.html">Logger</a></li><li><a href="module-core.MinimalStim.html">MinimalStim</a></li><li><a href="module-core.Mouse.html">Mouse</a></li><li><a href="module-core.PsychoJS.html">PsychoJS</a></li><li><a href="module-core.ServerManager.html">ServerManager</a></li><li><a href="module-core.Window.html">Window</a></li><li><a href="module-data.ExperimentHandler.html">ExperimentHandler</a></li><li><a href="module-data.Shelf.html">Shelf</a></li><li><a href="module-data.TrialHandler.html">TrialHandler</a></li><li><a href="module-sound.AudioClip.html">AudioClip</a></li><li><a href="module-sound.Microphone.html">Microphone</a></li><li><a href="module-sound.Sound.html">Sound</a></li><li><a href="module-sound.TonePlayer.html">TonePlayer</a></li><li><a href="module-sound.TrackPlayer.html">TrackPlayer</a></li><li><a href="module-sound.Transcriber.html">Transcriber</a></li><li><a href="module-sound.Transcript.html">Transcript</a></li><li><a href="module-util.Clock.html">Clock</a></li><li><a href="module-util.Color.html">Color</a></li><li><a href="module-util.CountdownTimer.html">CountdownTimer</a></li><li><a href="module-util.EventEmitter.html">EventEmitter</a></li><li><a href="module-util.MixinBuilder.html">MixinBuilder</a></li><li><a href="module-util.MonotonicClock.html">MonotonicClock</a></li><li><a href="module-util.PsychObject.html">PsychObject</a></li><li><a href="module-util.Scheduler.html">Scheduler</a></li><li><a href="module-visual.ButtonStim.html">ButtonStim</a></li><li><a href="module-visual.Form.html">Form</a></li><li><a href="module-visual.ImageStim.html">ImageStim</a></li><li><a href="module-visual.MovieStim.html">MovieStim</a></li><li><a href="module-visual.Polygon.html">Polygon</a></li><li><a href="module-visual.Rect.html">Rect</a></li><li><a href="module-visual.ShapeStim.html">ShapeStim</a></li><li><a href="module-visual.Slider.html">Slider</a></li><li><a href="module-visual.TextBox.html">TextBox</a></li><li><a href="module-visual.TextStim.html">TextStim</a></li><li><a href="module-visual.VisualStim.html">VisualStim</a></li></ul><h3>Interfaces</h3><ul><li><a href="module-sound.SoundPlayer.html">SoundPlayer</a></li></ul><h3>Mixins</h3><ul><li><a href="module-core.WindowMixin.html">WindowMixin</a></li><li><a href="module-util.ColorMixin.html">ColorMixin</a></li></ul>
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