feat: implement WooCommerce AJAX product filtering
This commit is contained in:
XShop
@@ -0,0 +1,594 @@
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/**
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* XShop AJAX Filters — vanilla, URL sync, chips, debounce for price, stale protection, a11y.
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* Works with template-parts/components/product-filters.php + shop toolbar + grid.
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*/
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(function () {
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'use strict';
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var DEBOUNCE_MS = 300;
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function debounce(fn, ms) {
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var t;
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return function () {
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var a = arguments, ctx = this;
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clearTimeout(t);
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t = setTimeout(function () { fn.apply(ctx, a); }, ms);
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};
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}
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function qsParam(params, key) {
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return params.get(key) || '';
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}
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function parseStateFromURL() {
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var params = new URLSearchParams(window.location.search);
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var state = {
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search: params.get('s') || '',
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category: params.get('category') || '',
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min_price: params.get('min_price') || '',
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max_price: params.get('max_price') || '',
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stock: params.get('stock') || 'all',
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on_sale: params.get('on_sale') === '1' || params.get('sale') === '1' ? '1' : '0',
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rating: params.get('rating') || '0',
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orderby: params.get('orderby') || 'default',
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page: parseInt(params.get('page') || '1', 10) || 1,
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per_page: parseInt(params.get('per_page') || '12', 10) || 12,
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attributes: {}
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};
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// Collect pa_* attributes
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params.forEach(function (val, key) {
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if (key.indexOf('pa_') === 0 || key.indexOf('attribute_') === 0 || key.indexOf('filter_') === 0) {
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var tax = key;
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if (tax.indexOf('attribute_') === 0) tax = 'pa_' + tax.slice(10);
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if (tax.indexOf('filter_') === 0) tax = 'pa_' + tax.slice(7);
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// normalize comma separated to array
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var terms = [];
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val.split(',').forEach(function (t) { t = t.trim(); if (t) terms.push(t); });
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if (terms.length) {
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// Also handle repeated keys via URLSearchParams.getAll would be better, but we use forEach which iterates each entry
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if (!state.attributes[tax]) state.attributes[tax] = [];
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terms.forEach(function (t) { if (state.attributes[tax].indexOf(t) === -1) state.attributes[tax].push(t); });
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}
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}
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});
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// Handle array params like pa_color[]=black (PHP style)
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params.forEach(function (val, key) {
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if (key.indexOf('pa_') === 0 && key.indexOf('[]') !== -1) {
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var base = key.replace('[]', '');
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if (!state.attributes[base]) state.attributes[base] = [];
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if (state.attributes[base].indexOf(val) === -1) state.attributes[base].push(val);
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}
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});
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return state;
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}
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function stateToParams(state) {
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var p = new URLSearchParams();
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if (state.search) p.set('s', state.search);
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if (state.category) p.set('category', state.category);
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Object.keys(state.attributes).forEach(function (tax) {
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var terms = state.attributes[tax];
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if (terms && terms.length) p.set(tax, terms.join(','));
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});
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if (state.min_price) p.set('min_price', state.min_price);
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if (state.max_price) p.set('max_price', state.max_price);
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if (state.stock && state.stock !== 'all') p.set('stock', state.stock);
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if (state.on_sale === '1') p.set('on_sale', '1');
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if (state.rating && state.rating !== '0' && state.rating !== 0) p.set('rating', String(state.rating));
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if (state.orderby && state.orderby !== 'default') p.set('orderby', state.orderby);
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if (state.page && state.page > 1) p.set('page', String(state.page));
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// per_page only if not default
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if (state.per_page && state.per_page !== 12) p.set('per_page', String(state.per_page));
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return p;
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}
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function stateToEndpoint(state) {
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var restUrl = (window.xshopData && window.xshopData.restUrl) ? window.xshopData.restUrl : '/wp-json/';
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var base = restUrl;
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// base is .../wp-json/xshop/v1/ or .../wp-json/
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var endpoint;
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if (base.indexOf('xshop/v1') !== -1) {
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endpoint = base.replace(/\/$/, '') + '/products';
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// if base is /wp-json/xshop/v1/ already, this is /wp-json/xshop/v1/products
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// if base is /wp-json/ we need /wp-json/xshop/v1/products
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if (base.indexOf('/wp-json/xshop/v1') === -1 && base.indexOf('xshop/v1') !== -1) {
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endpoint = base.replace(/\/$/, '') + '/products';
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}
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} else {
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// base is /wp-json/
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endpoint = base.replace(/\/$/, '') + '/xshop/v1/products';
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}
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// Fix duplicate wrapper
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endpoint = endpoint.replace('/xshop/v1/xshop/v1/', '/xshop/v1/');
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var p = stateToParams(state);
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// Also map search to endpoint param
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if (state.search) p.set('search', state.search);
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// Ensure page/per_page correct for endpoint (endpoint expects page/per_page)
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var qs = p.toString();
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return endpoint + (qs ? '?' + qs : '');
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}
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function renderProductCard(item) {
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// Reuse product-card markup via JS (avoid duplicating PHP). Minimal but token-consistent.
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// We keep structure close to PHP product-card for CSS reuse.
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var wrap = document.createElement('li');
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wrap.className = 'xshop-products__item product';
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var card = document.createElement('article');
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card.className = 'xshop-product-card product';
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var media = document.createElement('a');
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media.href = item.url;
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media.className = 'xshop-product-card__media';
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media.setAttribute('aria-label', item.title);
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if (item.image) {
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var img = document.createElement('img');
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img.src = item.image;
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img.alt = item.title;
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img.loading = 'lazy';
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img.decoding = 'async';
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media.appendChild(img);
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} else {
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var ph = document.createElement('span');
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ph.className = 'xshop-card__media--placeholder';
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ph.style.cssText = 'display:flex;inline-size:100%;block-size:100%;align-items:center;justify-content:center;';
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ph.textContent = 'No image';
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media.appendChild(ph);
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}
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// Badges: we only have in_stock, sale via price_html contains del? We can infer sale via price_html contains <del>
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var badges = document.createElement('span');
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badges.className = 'xshop-product-card__badges';
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badges.setAttribute('aria-hidden', 'true');
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if (item.price_html && item.price_html.indexOf('<del') !== -1) {
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var b = document.createElement('span');
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b.className = 'xshop-badge xshop-badge--sale';
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b.textContent = 'Sale';
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badges.appendChild(b);
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}
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if (!item.in_stock) {
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var o = document.createElement('span');
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o.className = 'xshop-badge xshop-badge--outofstock';
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o.textContent = 'Out of stock';
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badges.appendChild(o);
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}
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media.appendChild(badges);
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card.appendChild(media);
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var body = document.createElement('div');
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body.className = 'xshop-product-card__body';
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var h3 = document.createElement('h3');
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h3.className = 'xshop-product-card__title';
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var a = document.createElement('a');
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a.href = item.url;
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a.textContent = item.title;
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h3.appendChild(a);
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body.appendChild(h3);
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if (item.price_html) {
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var price = document.createElement('div');
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price.className = 'xshop-product-card__price';
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price.innerHTML = item.price_html; // trusted from Woo
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body.appendChild(price);
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}
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var meta = document.createElement('div');
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meta.className = 'xshop-product-card__meta';
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if (item.type === 'variable') {
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var v = document.createElement('span');
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v.textContent = 'Variable';
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meta.appendChild(v);
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}
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if (!item.in_stock) {
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var s = document.createElement('span');
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s.textContent = 'Out of stock';
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meta.appendChild(s);
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}
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body.appendChild(meta);
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var actions = document.createElement('div');
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actions.className = 'xshop-product-card__actions';
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var btn = document.createElement('a');
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btn.href = item.url;
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btn.className = 'button product_type_' + item.type;
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btn.textContent = item.in_stock ? 'View' : 'Read more';
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actions.appendChild(btn);
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body.appendChild(actions);
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card.appendChild(body);
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wrap.appendChild(card);
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return wrap;
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}
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function initFilters() {
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var filtersRoots = document.querySelectorAll('[data-xshop-filters]');
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var filtersRoot = filtersRoots[0];
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var grid = document.querySelector('.xshop-products') || document.querySelector('[data-xshop-products]');
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var resultsCountEl = document.querySelector('.woocommerce-result-count');
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var paginationEl = document.querySelector('.woocommerce-pagination') || document.querySelector('[data-xshop-pagination]');
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var orderingSelect = document.querySelector('.woocommerce-ordering select.orderby') || document.querySelector('[data-filter="orderby"]');
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var chipsEl = document.querySelector('[data-xshop-chips]');
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var forms = document.querySelectorAll('[data-xshop-filters-form]');
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var form = forms[0];
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var drawer = document.querySelector('[data-xshop-drawer]');
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var drawerToggle = document.querySelector('[data-xshop-drawer-toggle]');
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var drawerClose = document.querySelector('[data-xshop-drawer-close]');
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var overlay = document.querySelector('[data-xshop-drawer-overlay]');
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if (!filtersRoot) return;
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// grid may be missing on empty category (has empty state) — create container if needed
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var gridContainer = grid ? grid.parentElement : document.querySelector('.xshop-woo-layout') || document.body;
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var state = parseStateFromURL();
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var abortCtrl = null;
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var seq = 0;
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var isFirstLoad = true;
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function syncFormFromState() {
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forms.forEach(function (f) {
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f.querySelectorAll('input[name="category"]').forEach(function (el) {
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el.checked = el.value === state.category;
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if (!state.category && el.value === '') el.checked = true;
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});
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f.querySelectorAll('input[data-filter="attribute"]').forEach(function (el) {
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var tax = el.getAttribute('data-tax');
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var val = el.value;
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var active = state.attributes[tax] && state.attributes[tax].indexOf(val) !== -1;
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el.checked = !!active;
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});
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var minEl = f.querySelector('input[name="min_price"]');
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var maxEl = f.querySelector('input[name="max_price"]');
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if (minEl) minEl.value = state.min_price || '';
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if (maxEl) maxEl.value = state.max_price || '';
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f.querySelectorAll('input[name="stock"]').forEach(function (el) { el.checked = el.value === (state.stock || 'all'); });
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var saleEl = f.querySelector('input[name="on_sale"]');
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if (saleEl) saleEl.checked = state.on_sale === '1';
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f.querySelectorAll('input[name="rating"]').forEach(function (el) { el.checked = el.value === String(state.rating || '0'); });
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var ob = f.querySelector('select[name="orderby"]');
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if (ob) ob.value = state.orderby || 'default';
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});
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if (orderingSelect) orderingSelect.value = state.orderby || 'default';
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}
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function buildStateFromForm(srcForm) {
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var f = srcForm || form;
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if (!f) return state;
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var fd = new FormData(f);
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var newState = {
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search: state.search,
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category: (fd.get('category') || '').toString().trim(),
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min_price: (fd.get('min_price') || '').toString().trim(),
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max_price: (fd.get('max_price') || '').toString().trim(),
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stock: (fd.get('stock') || 'all').toString(),
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on_sale: fd.get('on_sale') === '1' ? '1' : '0',
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rating: (fd.get('rating') || '0').toString(),
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orderby: (fd.get('orderby') || 'default').toString(),
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page: 1,
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per_page: state.per_page,
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attributes: {}
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};
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// Collect checked attributes from ALL forms (since sidebar+drawer duplicate)
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document.querySelectorAll('input[data-filter="attribute"]:checked').forEach(function (el) {
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var tax = el.getAttribute('data-tax');
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if (!newState.attributes[tax]) newState.attributes[tax] = [];
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if (newState.attributes[tax].indexOf(el.value) === -1) newState.attributes[tax].push(el.value);
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});
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return newState;
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}
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function renderChips() {
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if (!chipsEl) return;
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chipsEl.innerHTML = '';
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var hasActive = false;
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function addChip(label, onRemove) {
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hasActive = true;
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var chip = document.createElement('button');
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chip.type = 'button';
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chip.className = 'xshop-chip';
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chip.textContent = label + ' ×';
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chip.setAttribute('aria-label', 'Remove filter ' + label);
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chip.addEventListener('click', onRemove);
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chipsEl.appendChild(chip);
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}
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if (state.category) {
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addChip('Category: ' + state.category, function () {
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state.category = '';
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state.page = 1;
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syncAndFetch(true);
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});
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}
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Object.keys(state.attributes).forEach(function (tax) {
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(state.attributes[tax] || []).forEach(function (term) {
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addChip(tax.replace('pa_', '') + ': ' + term, function () {
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var idx = state.attributes[tax].indexOf(term);
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if (idx !== -1) state.attributes[tax].splice(idx, 1);
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if (!state.attributes[tax].length) delete state.attributes[tax];
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state.page = 1;
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syncAndFetch(true);
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});
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});
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});
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if (state.min_price) addChip('Min ' + state.min_price, function () { state.min_price = ''; state.page = 1; syncAndFetch(true); });
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if (state.max_price) addChip('Max ' + state.max_price, function () { state.max_price = ''; state.page = 1; syncAndFetch(true); });
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if (state.stock && state.stock !== 'all') addChip('Stock: ' + state.stock, function () { state.stock = 'all'; state.page = 1; syncAndFetch(true); });
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if (state.on_sale === '1') addChip('On sale', function () { state.on_sale = '0'; state.page = 1; syncAndFetch(true); });
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if (state.rating && state.rating !== '0') addChip('Rating ' + state.rating + '+', function () { state.rating = '0'; state.page = 1; syncAndFetch(true); });
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if (state.search) addChip('Search: ' + state.search, function () { state.search = ''; state.page = 1; syncAndFetch(true); });
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if (hasActive) {
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var clearAll = document.createElement('button');
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clearAll.type = 'button';
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clearAll.className = 'xshop-chip xshop-chip--clear';
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clearAll.textContent = 'Clear all';
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clearAll.addEventListener('click', function () {
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state = { search: '', category: '', min_price: '', max_price: '', stock: 'all', on_sale: '0', rating: '0', orderby: 'default', page: 1, per_page: state.per_page, attributes: {} };
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// Preserve category context? If on category archive, clearing all should keep category context? We clear category context as well per "clear all" semantics (go to shop). If on category page, keep category? For now clear all goes to shop base (no category)
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syncAndFetch(true);
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});
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chipsEl.appendChild(clearAll);
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}
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}
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function updateURL(push) {
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var p = stateToParams(state);
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var url = window.location.pathname + (p.toString() ? '?' + p.toString() : '');
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if (push) {
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history.pushState(state, '', url);
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} else {
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history.replaceState(state, '', url);
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}
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}
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function setLoading(loading) {
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if (!gridContainer) return;
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gridContainer.setAttribute('aria-busy', loading ? 'true' : 'false');
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var loader = document.querySelector('[data-xshop-loading]');
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if (loader) loader.hidden = !loading;
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// toolbar still usable
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}
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function renderResults(data) {
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var items = data.items || [];
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var pagination = data.pagination || { page: 1, per_page: 12, total: 0, total_pages: 1 };
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// Ensure grid exists
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var targetGrid = document.querySelector('.xshop-products');
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if (!targetGrid) {
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// Create grid if was empty state
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var emptyState = document.querySelector('.xshop-empty');
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if (emptyState) emptyState.remove();
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targetGrid = document.createElement('ul');
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targetGrid.className = 'xshop-products products columns-4';
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if (gridContainer) gridContainer.appendChild(targetGrid);
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}
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if (targetGrid) {
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targetGrid.innerHTML = '';
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if (!items.length) {
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// Empty state
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targetGrid.remove();
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var empty = document.createElement('div');
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empty.className = 'xshop-empty';
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empty.innerHTML = '<h3 class="xshop-empty__title">No products found</h3><p class="xshop-empty__text">Try adjusting your filters.</p>';
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if (gridContainer) gridContainer.appendChild(empty);
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} else {
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items.forEach(function (it) {
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targetGrid.appendChild(renderProductCard(it));
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});
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}
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}
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// Result count
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if (resultsCountEl) {
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resultsCountEl.textContent = pagination.total + ' products';
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} else {
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var rc = document.querySelector('.woocommerce-result-count');
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if (rc) rc.textContent = pagination.total + ' products';
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}
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// Pagination
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renderPagination(pagination);
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renderChips();
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// Focus management: move focus to grid for screen readers
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if (targetGrid && !isFirstLoad) {
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targetGrid.setAttribute('tabindex', '-1');
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// Don't steal focus aggressively; just ensure aria-live
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}
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isFirstLoad = false;
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}
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function renderPagination(pag) {
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var container = paginationEl || document.querySelector('.woocommerce-pagination');
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if (!container) return;
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container.innerHTML = '';
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if (pag.total_pages <= 1) return;
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var nav = document.createElement('nav');
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nav.setAttribute('aria-label', 'Pagination');
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nav.className = 'xshop-pagination';
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var inner = document.createElement('div');
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inner.className = 'nav-links';
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for (var i = 1; i <= pag.total_pages; i++) {
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var btn = document.createElement('button');
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btn.type = 'button';
|
||||
btn.className = 'page-numbers' + (i === pag.page ? ' current' : '');
|
||||
btn.textContent = String(i);
|
||||
btn.setAttribute('aria-label', 'Page ' + i);
|
||||
if (i === pag.page) btn.setAttribute('aria-current', 'page');
|
||||
(function (pageNum) {
|
||||
btn.addEventListener('click', function () {
|
||||
state.page = pageNum;
|
||||
syncAndFetch(true);
|
||||
});
|
||||
})(i);
|
||||
inner.appendChild(btn);
|
||||
}
|
||||
nav.appendChild(inner);
|
||||
container.appendChild(nav);
|
||||
}
|
||||
|
||||
function syncAndFetch(pushURL) {
|
||||
syncFormFromState(); // ensure form reflects state (for back/forward)
|
||||
renderChips();
|
||||
updateURL(pushURL);
|
||||
fetchAndRender();
|
||||
}
|
||||
|
||||
var debouncedPriceFetch = debounce(function () {
|
||||
state.page = 1;
|
||||
syncAndFetch(true);
|
||||
}, DEBOUNCE_MS);
|
||||
|
||||
function fetchAndRender() {
|
||||
var mySeq = ++seq;
|
||||
if (abortCtrl) abortCtrl.abort();
|
||||
abortCtrl = new AbortController();
|
||||
setLoading(true);
|
||||
var url = stateToEndpoint(state);
|
||||
// Update URL already done
|
||||
fetch(url, { signal: abortCtrl.signal, headers: { 'Accept': 'application/json' } })
|
||||
.then(function (res) {
|
||||
if (!res.ok) throw new Error('http ' + res.status);
|
||||
return res.json();
|
||||
})
|
||||
.then(function (data) {
|
||||
if (mySeq !== seq) return; // stale
|
||||
setLoading(false);
|
||||
renderResults(data);
|
||||
})
|
||||
.catch(function (err) {
|
||||
if (err && err.name === 'AbortError') return;
|
||||
if (mySeq !== seq) return;
|
||||
setLoading(false);
|
||||
// show error, keep existing grid
|
||||
var errEl = document.querySelector('[data-xshop-error]');
|
||||
if (errEl) {
|
||||
errEl.hidden = false;
|
||||
errEl.textContent = 'Could not load products. Please try again.';
|
||||
setTimeout(function () { errEl.hidden = true; }, 3000);
|
||||
}
|
||||
});
|
||||
}
|
||||
|
||||
// Attach change listeners to all forms
|
||||
forms.forEach(function (f) {
|
||||
f.addEventListener('change', function (e) {
|
||||
var target = e.target;
|
||||
if (!target) return;
|
||||
if (target.getAttribute('data-filter') === 'price') return;
|
||||
var newState = buildStateFromForm(f);
|
||||
newState.search = state.search;
|
||||
newState.per_page = state.per_page;
|
||||
state = newState;
|
||||
syncAndFetch(true);
|
||||
});
|
||||
});
|
||||
|
||||
var priceInputs = document.querySelectorAll('input[name="min_price"], input[name="max_price"]');
|
||||
priceInputs.forEach(function (el) {
|
||||
el.addEventListener('input', function () {
|
||||
// Read from closest form
|
||||
var f = el.closest('form');
|
||||
var fd = f ? new FormData(f) : new FormData(form);
|
||||
state.min_price = (fd.get('min_price') || '').toString().trim();
|
||||
state.max_price = (fd.get('max_price') || '').toString().trim();
|
||||
state.page = 1;
|
||||
renderChips();
|
||||
updateURL(true);
|
||||
debouncedPriceFetch();
|
||||
});
|
||||
});
|
||||
|
||||
// Ordering select (toolbar and form)
|
||||
if (orderingSelect) {
|
||||
orderingSelect.addEventListener('change', function () {
|
||||
state.orderby = orderingSelect.value || 'default';
|
||||
state.page = 1;
|
||||
// sync form select too
|
||||
var formOb = form.querySelector('select[name="orderby"]');
|
||||
if (formOb) formOb.value = state.orderby;
|
||||
syncAndFetch(true);
|
||||
});
|
||||
}
|
||||
var formOrderby = form.querySelector('select[name="orderby"]');
|
||||
if (formOrderby && formOrderby !== orderingSelect) {
|
||||
formOrderby.addEventListener('change', function () {
|
||||
state.orderby = formOrderby.value || 'default';
|
||||
if (orderingSelect) orderingSelect.value = state.orderby;
|
||||
state.page = 1;
|
||||
syncAndFetch(true);
|
||||
});
|
||||
}
|
||||
|
||||
forms.forEach(function (f) {
|
||||
f.addEventListener('submit', function (e) {
|
||||
e.preventDefault();
|
||||
var newState = buildStateFromForm(f);
|
||||
newState.search = state.search;
|
||||
newState.per_page = state.per_page;
|
||||
state = newState;
|
||||
syncAndFetch(true);
|
||||
closeDrawer();
|
||||
});
|
||||
var clearAllLink = f.querySelector('[data-xshop-clear-all]');
|
||||
if (clearAllLink) {
|
||||
clearAllLink.addEventListener('click', function (e) {
|
||||
e.preventDefault();
|
||||
state = { search: state.search, category: '', min_price: '', max_price: '', stock: 'all', on_sale: '0', rating: '0', orderby: 'default', page: 1, per_page: state.per_page, attributes: {} };
|
||||
syncAndFetch(true);
|
||||
});
|
||||
}
|
||||
});
|
||||
|
||||
// Drawer
|
||||
function openDrawer() {
|
||||
if (!drawer) return;
|
||||
drawer.hidden = false;
|
||||
drawer.classList.add('is-open');
|
||||
if (overlay) overlay.hidden = false;
|
||||
var first = drawer.querySelector('input, select, button');
|
||||
if (first) first.focus();
|
||||
document.body.style.overflow = 'hidden';
|
||||
if (drawerToggle) drawerToggle.setAttribute('aria-expanded', 'true');
|
||||
}
|
||||
function closeDrawer() {
|
||||
if (!drawer) return;
|
||||
drawer.hidden = true;
|
||||
drawer.classList.remove('is-open');
|
||||
if (overlay) overlay.hidden = true;
|
||||
document.body.style.overflow = '';
|
||||
if (drawerToggle) {
|
||||
drawerToggle.setAttribute('aria-expanded', 'false');
|
||||
drawerToggle.focus();
|
||||
}
|
||||
}
|
||||
if (drawerToggle) {
|
||||
drawerToggle.addEventListener('click', function () {
|
||||
var isOpen = drawer && !drawer.hidden;
|
||||
if (isOpen) closeDrawer(); else openDrawer();
|
||||
});
|
||||
}
|
||||
if (drawerClose) drawerClose.addEventListener('click', closeDrawer);
|
||||
if (overlay) overlay.addEventListener('click', closeDrawer);
|
||||
document.addEventListener('keydown', function (e) {
|
||||
if (e.key === 'Escape' && drawer && !drawer.hidden) closeDrawer();
|
||||
});
|
||||
|
||||
// Browser back/forward
|
||||
window.addEventListener('popstate', function (e) {
|
||||
var newState = e.state ? e.state : parseStateFromURL();
|
||||
// e.state may be null on initial load; parse from URL
|
||||
if (!e.state) newState = parseStateFromURL();
|
||||
state = newState;
|
||||
syncFormFromState();
|
||||
renderChips();
|
||||
fetchAndRender();
|
||||
// Don't push URL again
|
||||
});
|
||||
|
||||
// Initial: parse URL, sync form, render chips, but don't fetch if server-rendered matches? We will fetch to ensure AJAX grid matches server (in case of direct URL with filters, server already rendered correctly, but we want to ensure pagination etc sync). To avoid double fetch on initial load with no filters, we skip fetch if no filters and not paginated.
|
||||
syncFormFromState();
|
||||
renderChips();
|
||||
// If URL has any filter param (category/attributes/price etc) or page>1 or search, we should ensure grid reflects it (server already did if no-JS). But to keep AJAX in sync, we could fetch once if filters present? For now, we only fetch on user interaction; initial server render is sufficient. But to support back/forward after JS navigation, we need fetch on popstate. So initial load does not auto-fetch unless needed.
|
||||
// However, if user lands on /shop/?category=... directly, server already rendered filtered products (no-JS fallback). That's correct. No need to double fetch.
|
||||
|
||||
// Expose for testing
|
||||
window.xshopFilters = { state: state, fetch: fetchAndRender, parse: parseStateFromURL };
|
||||
}
|
||||
|
||||
if (document.readyState === 'loading') {
|
||||
document.addEventListener('DOMContentLoaded', initFilters);
|
||||
} else {
|
||||
initFilters();
|
||||
}
|
||||
})();
|
||||
Reference in New Issue
Block a user