94 lines
2.5 KiB
JavaScript
94 lines
2.5 KiB
JavaScript
(function () {
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'use strict';
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/* global info, jugl */
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const template = new jugl.Template('template');
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const target = document.getElementById('examples');
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function listExamples(examples) {
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target.innerHTML = '';
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template.process({
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context: {examples: examples},
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clone: true,
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parent: target,
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});
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document.getElementById('count').innerHTML = String(examples.length);
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}
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let timerId;
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function inputChange() {
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if (timerId) {
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window.clearTimeout(timerId);
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}
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const text = this.value;
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timerId = window.setTimeout(function () {
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filterList(text);
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}, 500);
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}
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function getMatchingExamples(text) {
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text = text.trim();
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if (text.length === 0) {
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return info.examples;
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}
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const words = text.toLowerCase().split(/\W+/);
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const scores = {};
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const updateScores = function (dict, word) {
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// eslint-disable-next-line prefer-const
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for (let exIndex in dict) {
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let exScore = scores[exIndex];
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if (!exScore) {
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exScore = {};
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scores[exIndex] = exScore;
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}
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exScore[word] = (exScore[word] || 0) + dict[exIndex];
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}
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};
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words.forEach(function (word) {
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const dict = info.wordIndex[word];
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if (dict) {
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updateScores(dict, word);
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} else {
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const r = new RegExp(word);
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// eslint-disable-next-line prefer-const
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for (let idx in info.wordIndex) {
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if (r.test(idx)) {
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updateScores(info.wordIndex[idx], word);
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}
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}
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}
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});
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const examples = [];
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// eslint-disable-next-line prefer-const
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for (let exIndex in scores) {
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const ex = info.examples[exIndex];
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ex.score = 0;
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ex.words = 0;
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// eslint-disable-next-line prefer-const
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for (let word in scores[exIndex]) {
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ex.score += scores[exIndex][word];
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ex.words++;
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}
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examples.push(ex);
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}
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// sort examples, first by number of words matched, then
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// by word frequency
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examples.sort(function (a, b) {
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return b.score - a.score || b.words - a.words;
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});
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return examples;
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}
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function filterList(text) {
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const examples = getMatchingExamples(text);
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listExamples(examples);
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}
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const params = new URLSearchParams(window.location.search);
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const text = params.get('q') || '';
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const input = document.getElementById('keywords');
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input.addEventListener('input', inputChange);
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input.value = text;
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filterList(text);
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})();
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