init
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emmymayo
@@ -0,0 +1,388 @@
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/* globals related_posts_js_options */
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/**
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* Load related posts
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*/
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( function () {
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'use strict';
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var jprp = {
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response: null,
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/**
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* Utility get related posts JSON endpoint from URLs
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*
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* @param {string} URL (optional)
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* @return {string} Endpoint URL
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*/
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getEndpointURL: function ( URL ) {
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var locationObject,
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is_customizer =
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'undefined' !== typeof wp &&
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wp.customize &&
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wp.customize.settings &&
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wp.customize.settings.url &&
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wp.customize.settings.url.self;
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// If we're in Customizer, write the correct URL.
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if ( is_customizer ) {
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locationObject = document.createElement( 'a' );
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locationObject.href = wp.customize.settings.url.self;
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} else {
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locationObject = document.location;
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}
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if ( 'string' === typeof URL && URL.match( /^https?:\/\// ) ) {
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locationObject = document.createElement( 'a' );
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locationObject.href = URL;
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}
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var args = 'relatedposts=1';
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var relatedPosts = document.querySelector( '#jp-relatedposts' );
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if ( ! relatedPosts ) {
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return false;
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}
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if ( relatedPosts.hasAttribute( 'data-exclude' ) ) {
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args += '&relatedposts_exclude=' + relatedPosts.getAttribute( 'data-exclude' );
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}
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if ( is_customizer ) {
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args += '&jetpackrpcustomize=1';
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}
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var pathname = locationObject.pathname;
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if ( '/' !== pathname[ 0 ] ) {
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pathname = '/' + pathname;
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}
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if ( '' === locationObject.search ) {
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return pathname + '?' + args;
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}
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return pathname + locationObject.search + '&' + args;
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},
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getAnchor: function ( post, classNames ) {
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var anchorTitle = post.title;
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var anchor = document.createElement( 'a' );
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anchor.setAttribute( 'class', classNames );
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anchor.setAttribute( 'href', post.url );
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anchor.setAttribute( 'title', anchorTitle );
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anchor.setAttribute( 'data-origin', post.url_meta.origin );
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anchor.setAttribute( 'data-position', post.url_meta.position );
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if ( '' !== post.rel ) {
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anchor.setAttribute( 'rel', post.rel );
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}
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var div = document.createElement( 'div' );
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div.appendChild( anchor );
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var anchorHTML = div.innerHTML;
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return [ anchorHTML.substring( 0, anchorHTML.length - 4 ), '</a>' ];
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},
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generateMinimalHtml: function ( posts, options ) {
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var self = this;
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var html = '';
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posts.forEach( function ( post, index ) {
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var anchor = self.getAnchor( post, 'jp-relatedposts-post-a' );
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var classes = 'jp-relatedposts-post jp-relatedposts-post' + index;
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if ( post.classes.length > 0 ) {
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classes += ' ' + post.classes.join( ' ' );
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}
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html +=
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'<p class="' +
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classes +
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'" data-post-id="' +
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post.id +
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'" data-post-format="' +
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post.format +
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'">';
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html +=
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'<span class="jp-relatedposts-post-title">' +
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anchor[ 0 ] +
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post.title +
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anchor[ 1 ] +
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'</span>';
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if ( options.showDate ) {
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html +=
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'<time class="jp-relatedposts-post-date" datetime="' +
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post.date +
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'">' +
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post.date +
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'</time>';
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}
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if ( options.showContext ) {
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html += '<span class="jp-relatedposts-post-context">' + post.context + '</span>';
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}
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html += '</p>';
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} );
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return (
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'<div class="jp-relatedposts-items jp-relatedposts-items-minimal jp-relatedposts-' +
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options.layout +
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' ">' +
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html +
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'</div>'
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);
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},
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generateVisualHtml: function ( posts, options ) {
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var self = this;
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var html = '';
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posts.forEach( function ( post, index ) {
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var anchor = self.getAnchor( post, 'jp-relatedposts-post-a' );
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var classes = 'jp-relatedposts-post jp-relatedposts-post' + index;
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if ( post.classes.length > 0 ) {
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classes += ' ' + post.classes.join( ' ' );
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}
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if ( ! post.img.src ) {
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classes += ' jp-relatedposts-post-nothumbs';
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} else {
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classes += ' jp-relatedposts-post-thumbs';
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}
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var dummyContainer = document.createElement( 'p' );
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dummyContainer.innerHTML = post.excerpt;
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var excerpt = dummyContainer.textContent;
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html +=
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'<div class="' +
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classes +
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'" data-post-id="' +
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post.id +
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'" data-post-format="' +
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post.format +
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'">';
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if ( post.img.src ) {
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html +=
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anchor[ 0 ] +
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'<img class="jp-relatedposts-post-img" loading="lazy" src="' +
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post.img.src +
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'" width="' +
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post.img.width +
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'" height="' +
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post.img.height +
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( post.img.srcset ? '" srcset="' + post.img.srcset : '' ) +
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( post.img.sizes ? '" sizes="' + post.img.sizes : '' ) +
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'" alt="' +
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post.img.alt_text +
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'" />' +
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anchor[ 1 ];
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} else {
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var anchor_overlay = self.getAnchor(
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post,
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'jp-relatedposts-post-a jp-relatedposts-post-aoverlay'
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);
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html += anchor_overlay[ 0 ] + anchor_overlay[ 1 ];
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}
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html +=
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'<' +
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related_posts_js_options.post_heading +
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' class="jp-relatedposts-post-title">' +
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anchor[ 0 ] +
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post.title +
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anchor[ 1 ] +
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'</' +
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related_posts_js_options.post_heading +
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'>';
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html += '<p class="jp-relatedposts-post-excerpt">' + excerpt + '</p>';
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if ( options.showDate ) {
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html +=
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'<time class="jp-relatedposts-post-date" datetime="' +
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post.date +
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'">' +
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post.date +
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'</time>';
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}
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if ( options.showContext ) {
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html += '<p class="jp-relatedposts-post-context">' + post.context + '</p>';
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}
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html += '</div>';
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} );
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return (
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'<div class="jp-relatedposts-items jp-relatedposts-items-visual jp-relatedposts-' +
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options.layout +
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' ">' +
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html +
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'</div>'
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);
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},
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/**
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* We want to set a max height on the excerpt however we want to set
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* this according to the natual pacing of the page as we never want to
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* cut off a line of text in the middle so we need to do some detective
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* work.
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*/
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setVisualExcerptHeights: function () {
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var elements = document.querySelectorAll(
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'#jp-relatedposts .jp-relatedposts-post-nothumbs .jp-relatedposts-post-excerpt'
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);
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if ( ! elements.length ) {
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return;
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}
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var firstElementStyles = getComputedStyle( elements[ 0 ] );
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var fontSize = parseInt( firstElementStyles.fontSize, 10 );
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var lineHeight = parseInt( firstElementStyles.lineHeight, 10 );
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// Show 5 lines of text
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for ( var i = 0; i < elements.length; i++ ) {
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elements[ i ].style.maxHeight = ( 5 * lineHeight ) / fontSize + 'em';
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}
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},
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getTrackedUrl: function ( anchor ) {
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var args = 'relatedposts_hit=1';
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args += '&relatedposts_origin=' + anchor.getAttribute( 'data-origin' );
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args += '&relatedposts_position=' + anchor.getAttribute( 'data-position' );
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var pathname = anchor.pathname;
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if ( '/' !== pathname[ 0 ] ) {
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pathname = '/' + pathname;
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}
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if ( '' === anchor.search ) {
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return pathname + '?' + args;
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}
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return pathname + anchor.search + '&' + args;
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},
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cleanupTrackedUrl: function () {
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if ( 'function' !== typeof history.replaceState ) {
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return;
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}
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var cleaned_search = document.location.search.replace(
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/\brelatedposts_[a-z]+=[0-9]*&?\b/gi,
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''
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);
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if ( '?' === cleaned_search ) {
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cleaned_search = '';
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}
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if ( document.location.search !== cleaned_search ) {
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history.replaceState( {}, document.title, document.location.pathname + cleaned_search );
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}
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},
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};
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function afterPostsHaveLoaded() {
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jprp.setVisualExcerptHeights();
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var posts = document.querySelectorAll( '#jp-relatedposts a.jp-relatedposts-post-a' );
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Array.prototype.forEach.call( posts, function ( post ) {
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document.addEventListener( 'click', function () {
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post.href = jprp.getTrackedUrl( post );
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} );
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} );
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}
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/**
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* Initialize Related Posts.
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*/
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function startRelatedPosts() {
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jprp.cleanupTrackedUrl();
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var endpointURL = jprp.getEndpointURL();
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if ( ! endpointURL ) {
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return;
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}
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if ( document.querySelectorAll( '#jp-relatedposts .jp-relatedposts-post' ).length ) {
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afterPostsHaveLoaded();
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return;
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}
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var relatedPosts = document.querySelector( '#jp-relatedposts' );
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var request = new XMLHttpRequest();
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request.open( 'GET', endpointURL, true );
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request.setRequestHeader( 'x-requested-with', 'XMLHttpRequest' );
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request.onreadystatechange = function () {
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if ( this.readyState === XMLHttpRequest.DONE && this.status === 200 ) {
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try {
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var response = JSON.parse( request.responseText );
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if ( 0 === response.items.length || 0 === relatedPosts.length ) {
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return;
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}
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jprp.response = response;
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var html,
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showThumbnails,
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options = {};
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if ( 'undefined' !== typeof wp && wp.customize ) {
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showThumbnails = wp.customize.instance( 'jetpack_relatedposts[show_thumbnails]' ).get();
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options.showDate = wp.customize.instance( 'jetpack_relatedposts[show_date]' ).get();
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options.showContext = wp.customize
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.instance( 'jetpack_relatedposts[show_context]' )
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.get();
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options.layout = wp.customize.instance( 'jetpack_relatedposts[layout]' ).get();
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} else {
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showThumbnails = response.show_thumbnails;
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options.showDate = response.show_date;
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options.showContext = response.show_context;
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options.layout = response.layout;
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}
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html = ! showThumbnails
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? jprp.generateMinimalHtml( response.items, options )
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: jprp.generateVisualHtml( response.items, options );
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var div = document.createElement( 'div' );
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relatedPosts.appendChild( div );
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div.outerHTML = html;
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if ( options.showDate ) {
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var dates = relatedPosts.querySelectorAll( '.jp-relatedposts-post-date' );
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Array.prototype.forEach.call( dates, function ( date ) {
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date.style.display = 'block';
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} );
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}
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relatedPosts.style.display = 'block';
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afterPostsHaveLoaded();
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} catch {
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// Do nothing
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}
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}
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};
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request.send();
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}
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function init() {
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if ( 'undefined' !== typeof wp && wp.customize ) {
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if ( wp.customize.selectiveRefresh ) {
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wp.customize.selectiveRefresh.bind( 'partial-content-rendered', function ( placement ) {
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if ( 'jetpack_relatedposts' === placement.partial.id ) {
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startRelatedPosts();
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}
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} );
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}
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wp.customize.bind( 'preview-ready', startRelatedPosts );
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} else {
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startRelatedPosts();
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}
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}
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if ( document.readyState !== 'loading' ) {
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init();
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} else {
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document.addEventListener( 'DOMContentLoaded', init );
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}
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} )();
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