mirror of
https://gerrit.wikimedia.org/r/mediawiki/skins/Vector.git
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121 lines
3.4 KiB
JavaScript
121 lines
3.4 KiB
JavaScript
/**
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* Example A/B test configuration for sticky header:
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*
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* $wgVectorABTestEnrollment = [
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* 'name' => 'vector.sticky_header',
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* 'enabled' => true,
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* 'buckets' => [
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* 'unsampled' => [
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* 'samplingRate' => 0.1,
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* ],
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* 'control' => [
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* 'samplingRate' => 0.3,
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* ],
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* 'stickyHeaderDisabled' => [
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* 'samplingRate' => 0.3,
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* ],
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* 'stickyHeaderEnabled' => [
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* 'samplingRate' => 0.3,
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* ],
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* ],
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* ];
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*/
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/**
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* Functions and variables to implement A/B testing.
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*/
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const ABTestConfig = require( /** @type {string} */ ( './config.json' ) ).wgVectorWebABTestEnrollment || {};
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/**
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* Get the name of the bucket the user is assigned to for A/B testing.
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*
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* @return {string} the name of the bucket the user is assigned.
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*/
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function getBucketName() {
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/**
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* Provided config should contain the keys:
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* name: the name of the experiment prefixed with the skin name.
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* enabled: must be true or all users are assigned to control.
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* buckets: dict with bucket name as key and test config as value.
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*
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* Bucket test config can contain the keys:
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* samplingRate: sampling rates will be summed up and each bucket will receive a proportion
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* equal to its value.
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*/
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return mw.experiments.getBucket( {
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name: ABTestConfig.name,
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enabled: ABTestConfig.enabled,
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buckets: {
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// @ts-ignore
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unsampled: ABTestConfig.buckets.unsampled.samplingRate,
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control: ABTestConfig.buckets.control.samplingRate,
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stickyHeaderDisabled: ABTestConfig.buckets.stickyHeaderDisabled.samplingRate,
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stickyHeaderEnabled: ABTestConfig.buckets.stickyHeaderEnabled.samplingRate
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}
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}, mw.user.getId().toString() );
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}
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/**
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* Get the group and experiment name for an A/B test.
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*
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* @return {Object} data to pass to event logging
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*/
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function getABTestGroupExperimentName() {
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return {
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group: getBucketName(),
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experimentName: ABTestConfig.name
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};
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}
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/**
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* Provides A/B test config for the current user.
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*
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* @return {Object} A/B test config data
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*/
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function getEnabledExperiment() {
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const mergedConfig = {};
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if ( ABTestConfig.enabled ) {
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// Merge all the A/B config to return.
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Object.assign( mergedConfig, getABTestGroupExperimentName(), ABTestConfig );
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}
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return mergedConfig;
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}
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/**
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* Determine if user is in test group to experience feature.
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*
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* @param {string} bucket the bucket name the user is assigned
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* @param {string} targetGroup the target test group to experience feature
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* @return {boolean} true if the user should experience feature
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*/
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function isInTestGroup( bucket, targetGroup ) {
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return bucket === targetGroup;
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}
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/**
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* Fire hook to register A/B test enrollment.
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*
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* @param {string} bucket the bucket user is assigned to
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*/
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function initAB( bucket ) {
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// Send data to WikimediaEvents to log A/B test initialization if experiment is enabled
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// and if the user is logged in.
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if ( ABTestConfig.enabled && !mw.user.isAnon() && bucket !== 'unsampled' ) {
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// @ts-ignore
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mw.hook( 'mediawiki.web_AB_test_enrollment' ).fire( getABTestGroupExperimentName() );
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// Remove class if present on the html element so that scroll padding isn't undesirably
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// applied to users who don't experience the new treatment.
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if ( bucket !== 'stickyHeaderEnabled' ) {
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document.documentElement.classList.remove( 'vector-sticky-header-enabled' );
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}
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}
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}
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module.exports = {
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isInTestGroup,
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getEnabledExperiment,
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initAB
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};
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