mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/RelatedArticles
synced 2024-12-04 20:58:49 +00:00
93 lines
2.8 KiB
JavaScript
93 lines
2.8 KiB
JavaScript
( function ( $, mw ) {
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var relatedPages = new mw.relatedPages.RelatedPagesGateway(
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new mw.Api(),
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mw.config.get( 'wgPageName' ),
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mw.config.get( 'wgRelatedArticles' ),
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mw.config.get( 'wgRelatedArticlesUseCirrusSearch' ),
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mw.config.get( 'wgRelatedArticlesOnlyUseCirrusSearch' )
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),
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LIMIT = mw.config.get( 'wgRelatedArticlesCardLimit' ),
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debouncedLoad = $.debounce( 100, function () {
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loadRelatedArticles(); // eslint-disable-line
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} ),
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$window = $( window ),
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shouldShowReadMore;
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/**
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* Gets whether the feature is enabled for the user.
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*
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* The user's session ID is used to determine the eligibility for
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* RelatedArticles functionality, based on the value of
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* `$wgRelatedArticlesEnabledBucketSize`. The result of the function will be
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* the same for the duration of their session.
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*
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* @return {boolean}
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*/
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function isEnabledForCurrentUser() {
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var bucket,
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bucketSize = mw.config.get( 'wgRelatedArticlesEnabledBucketSize', 1 );
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bucket = mw.experiments.getBucket( {
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name: 'ext.relatedArticles.visibility',
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enabled: true,
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buckets: {
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control: 1 - bucketSize,
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A: bucketSize
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}
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}, mw.user.sessionId() );
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return bucket === 'A';
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}
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/**
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* Load related articles when the user scrolls past half of the window height.
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*
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* @ignore
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*/
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function loadRelatedArticles() {
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var readMore = $( '.read-more-container' ).get( 0 ),
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scrollThreshold = $window.height() * 2;
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if ( mw.viewport.isElementCloseToViewport( readMore, scrollThreshold ) ) {
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$.when(
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// Note we load dependencies here rather than ResourceLoader
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// to avoid PHP exceptions when Cards not installed
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// which should never happen given the if statement.
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mw.loader.using( [
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'ext.relatedArticles.cards',
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'ext.relatedArticles.readMore'
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] ),
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relatedPages.getForCurrentPage( LIMIT )
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).done( function ( _, pages ) {
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if ( pages.length ) {
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mw.track( 'ext.relatedArticles.init', pages );
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} else {
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readMore.remove();
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}
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} );
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// detach handler to stop subsequent loads on scroll
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$window.off( 'scroll', debouncedLoad );
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}
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}
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shouldShowReadMore = isEnabledForCurrentUser();
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if ( shouldShowReadMore ) {
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// Add container to DOM for checking distance on scroll
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// If a skin has marked up a footer content area prepend it there
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if ( $( '.footer-content' ).length ) {
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$( '<div class="read-more-container" />' ).prependTo( '.footer-content' );
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} else {
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$( '<div class="read-more-container post-content" />' )
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.insertAfter( '#content' );
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}
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// try related articles load on scroll
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$window.on( 'scroll', debouncedLoad );
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// try an initial load, in case of no scroll
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loadRelatedArticles();
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}
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mw.track( 'ext.relatedArticles.logEnabled', { isEnabled: shouldShowReadMore } );
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}( jQuery, mediaWiki ) );
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