133 lines
3.4 KiB
JavaScript
133 lines
3.4 KiB
JavaScript
var base_path = 'function' === typeof importScripts ? '.' : '/search/';
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var allowSearch = false;
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var index;
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var documents = {};
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var lang = ['en'];
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var data;
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function getScript(script, callback) {
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console.log('Loading script: ' + script);
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$.getScript(base_path + script)
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.done(function () {
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callback();
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})
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.fail(function (jqxhr, settings, exception) {
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console.log('Error: ' + exception);
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});
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}
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function getScriptsInOrder(scripts, callback) {
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if (scripts.length === 0) {
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callback();
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return;
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}
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getScript(scripts[0], function () {
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getScriptsInOrder(scripts.slice(1), callback);
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});
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}
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function loadScripts(urls, callback) {
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if ('function' === typeof importScripts) {
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importScripts.apply(null, urls);
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callback();
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} else {
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getScriptsInOrder(urls, callback);
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}
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}
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function onJSONLoaded() {
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data = JSON.parse(this.responseText);
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var scriptsToLoad = ['lunr.js'];
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if (data.config && data.config.lang && data.config.lang.length) {
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lang = data.config.lang;
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}
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if (lang.length > 1 || lang[0] !== 'en') {
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scriptsToLoad.push('lunr.stemmer.support.js');
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if (lang.length > 1) {
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scriptsToLoad.push('lunr.multi.js');
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}
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for (var i = 0; i < lang.length; i++) {
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if (lang[i] != 'en') {
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scriptsToLoad.push(['lunr', lang[i], 'js'].join('.'));
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}
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}
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}
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loadScripts(scriptsToLoad, onScriptsLoaded);
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}
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function onScriptsLoaded() {
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console.log('All search scripts loaded, building Lunr index...');
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if (data.config && data.config.separator && data.config.separator.length) {
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lunr.tokenizer.separator = new RegExp(data.config.separator);
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}
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if (data.index) {
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index = lunr.Index.load(data.index);
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data.docs.forEach(function (doc) {
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documents[doc.location] = doc;
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});
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console.log('Lunr pre-built index loaded, search ready');
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} else {
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index = lunr(function () {
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if (lang.length === 1 && lang[0] !== 'en' && lunr[lang[0]]) {
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this.use(lunr[lang[0]]);
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} else if (lang.length > 1) {
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this.use(lunr.multiLanguage.apply(null, lang)); // spread operator not supported in all browsers: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Spread_operator#Browser_compatibility
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}
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this.field('title');
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this.field('text');
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this.ref('location');
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for (var i = 0; i < data.docs.length; i++) {
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var doc = data.docs[i];
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this.add(doc);
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documents[doc.location] = doc;
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}
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});
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console.log('Lunr index built, search ready');
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}
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allowSearch = true;
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postMessage({ config: data.config });
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postMessage({ allowSearch: allowSearch });
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}
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function init() {
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var oReq = new XMLHttpRequest();
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oReq.addEventListener('load', onJSONLoaded);
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var index_path = base_path + '/search_index.json';
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if ('function' === typeof importScripts) {
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index_path = 'search_index.json';
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}
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oReq.open('GET', index_path);
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oReq.send();
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}
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function search(query) {
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if (!allowSearch) {
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console.error('Assets for search still loading');
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return;
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}
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var resultDocuments = [];
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var results = index.search(query);
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for (var i = 0; i < results.length; i++) {
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var result = results[i];
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doc = documents[result.ref];
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doc.summary = doc.text.substring(0, 200);
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resultDocuments.push(doc);
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}
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return resultDocuments;
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}
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if ('function' === typeof importScripts) {
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onmessage = function (e) {
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if (e.data.init) {
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init();
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} else if (e.data.query) {
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postMessage({ results: search(e.data.query) });
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} else {
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console.error('Worker - Unrecognized message: ' + e);
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}
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};
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}
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