blog/themes/next/source/js/third-party/search/algolia-search.js

137 lines
4.9 KiB
JavaScript

/* global CONFIG, NexT, pjax */
document.addEventListener('DOMContentLoaded', () => {
const { indexName, appID, apiKey, hits } = CONFIG.algolia;
const client = window['algoliasearch/lite'].liteClient(appID, apiKey);
const input = document.querySelector('.search-input');
const container = document.querySelector('.search-result-container');
const formatHits = data => {
const { title, excerpt, excerptStrip, contentStripTruncate } = data._highlightResult;
let result = `<li><a href="${data.permalink}" class="search-result-title">${title.value}</a>`;
const content = excerpt?.value || excerptStrip?.value || contentStripTruncate?.value;
if (content) {
const div = document.createElement('div');
div.innerHTML = content;
result += `<a href="${data.permalink}"><p class="search-result">${div.textContent.substring(0, 100)}...</p></a></li>`;
}
return result;
};
let isSearching = false;
let pendingQuery = null;
const searchAlgolia = async(searchText, page = 0) => {
if (isSearching) {
pendingQuery = { searchText, page };
return;
}
isSearching = true;
const startTime = Date.now();
const result = await client.search({
requests: [{
indexName,
page,
query : searchText,
hitsPerPage : hits.per_page || 10,
attributesToRetrieve : ['permalink'],
attributesToHighlight: ['title', 'excerpt', 'excerptStrip', 'contentStripTruncate'],
highlightPreTag : '<mark class="search-keyword">',
highlightPostTag : '</mark>'
}]
});
const data = result.results[0];
if (data.nbHits === 0) {
container.innerHTML = '<div class="search-result-icon"><i class="far fa-frown fa-5x"></i></div>';
} else {
const stats = CONFIG.i18n.hits_time
.replace('${hits}', data.nbHits)
.replace('${time}', Date.now() - startTime);
let pagination = '';
if (data.nbPages > 1) {
pagination += '<nav class="pagination algolia-pagination">';
for (let i = 0; i < data.nbPages; i++) {
if (i === page) {
pagination += `<span class="page-number current">${i + 1}</span>`;
} else {
pagination += `<a class="page-number" href="#" data-index=${i}>${i + 1}</a>`;
}
}
pagination += '</nav>';
}
container.innerHTML = `<div class="search-stats">
<span>${stats}</span>
<img src="${CONFIG.images}/logo-algolia-nebula-blue-full.svg" alt="Algolia">
</div>
<hr>
<ul class="search-result-list">${data.hits.map(formatHits).join('')}</ul>
${pagination}`;
if (typeof pjax === 'object') pjax.refresh(container);
container.querySelectorAll('.page-number').forEach(element => {
element.addEventListener('click', async event => {
event.preventDefault();
await searchAlgolia(searchText, Number(element.dataset.index));
});
});
}
isSearching = false;
if (pendingQuery !== null && (pendingQuery.searchText !== searchText || pendingQuery.page !== page)) {
const { searchText, page } = pendingQuery;
pendingQuery = null;
searchAlgolia(searchText, page);
}
};
const inputEventFunction = async() => {
const searchText = input.value.trim();
if (searchText === '') {
container.innerHTML = '<div class="search-result-icon"><i class="fab fa-algolia fa-5x"></i></div>';
return;
}
// Algolia client will automatically cache the data for same queries
await searchAlgolia(searchText, 0);
};
const debouncedSearch = NexT.utils.debounce(inputEventFunction, 500);
input.addEventListener('input', debouncedSearch);
// Handle and trigger popup window
document.querySelectorAll('.popup-trigger').forEach(element => {
element.addEventListener('click', () => {
NexT.utils.setGutter();
document.body.classList.add('search-active');
// Wait for search-popup animation to complete
setTimeout(() => input.focus(), 500);
});
});
// Monitor main search box
const onPopupClose = () => {
NexT.utils.setGutter('0');
document.body.classList.remove('search-active');
};
document.querySelector('.search-pop-overlay').addEventListener('click', event => {
if (event.target === document.querySelector('.search-pop-overlay')) {
onPopupClose();
}
});
document.querySelector('.popup-btn-close').addEventListener('click', onPopupClose);
document.addEventListener('pjax:success', onPopupClose);
window.addEventListener('keydown', event => {
if ((event.ctrlKey || event.metaKey) && event.key === 'k') {
event.preventDefault();
NexT.utils.setGutter();
document.body.classList.add('search-active');
setTimeout(() => input.focus(), 500);
}
});
window.addEventListener('keyup', event => {
if (event.key === 'Escape') {
onPopupClose();
}
});
});