website/static/js/search.js
2020-01-12 21:35:20 +01:00

103 lines
2.7 KiB
JavaScript

var lunrIndex,
$results,
pagesIndex;
// Initialize lunrjs using our generated index file
function initLunr() {
// First retrieve the index file
$.getJSON("/bower_components/lunr.js/PagesIndex.json")
.done(function(index) {
pagesIndex = index;
console.log("index:", pagesIndex);
// Set up lunrjs by declaring the fields we use
// Also provide their boost level for the ranking
lunrIndex = lunr(function() {
this.field("title", {
boost: 10
});
this.field("tags", {
boost: 5
});
this.field("content");
// ref is the result item identifier (I chose the page URL)
this.ref("href");
});
// Feed lunr with each file and let lunr actually index them
pagesIndex.forEach(function(page) {
lunrIndex.add(page);
});
})
.fail(function(jqxhr, textStatus, error) {
var err = textStatus + ", " + error;
console.error("Error getting Hugo index flie:", err);
});
}
// Nothing crazy here, just hook up a listener on the input field
function initUI() {
$results = $("#results");
$("#search").keyup(function() {
$results.empty();
// Only trigger a search when 2 chars. at least have been provided
var query = $(this).val();
if (query.length < 2) {
return;
}
var results = search(query);
renderResults(results);
});
}
/**
* Trigger a search in lunr and transform the result
*
* @param {String} query
* @return {Array} results
*/
function search(query) {
// Find the item in our index corresponding to the lunr one to have more info
// Lunr result:
// {ref: "/section/page1", score: 0.2725657778206127}
// Our result:
// {title:"Page1", href:"/section/page1", ...}
return lunrIndex.search(query).map(function(result) {
return pagesIndex.filter(function(page) {
return page.href === result.ref;
})[0];
});
}
/**
* Display the 10 first results
*
* @param {Array} results to display
*/
function renderResults(results) {
if (!results.length) {
return;
}
// Only show the ten first results
results.slice(0, 10).forEach(function(result) {
var $result = $("<li>");
$result.append($("<a>", {
href: result.href,
text: "» " + result.title
}));
$results.append($result);
});
}
// Let's get started
initLunr();
$(document).ready(function() {
initUI();
});