为什么要增加Algolia搜索插件
个原因当然是这样可以让博客显得更加炫酷；其次就是原来常用的swiftype插件不再免费，而且Algolia不仅免费，感觉上要比Swiftype要快。
就没有别人有写相关博客吗
你可能会有这样的疑问。我的回答是当然有，例如Hexo集成Algolia搜索插件，但是可能是NexT主题版本造成的不同，不能完全照搬。

当然，我也会写一些重复的东西，这样也不用再到别人的的博客上去翻了，万一他们博客登不上去了呢。

准备工作
确定你的NexT版本号，查看的方式是在NexT主题文件夹下的_config.yml文件中的末端，我的是5.0.1。见下图。

到Algolia官网，注册一个账号，当然你可以用Github账号，重新注册的话163这种邮箱是不能用的。

新建一个新的Index，当然用已有的也可以，再在新的Index上进行基础设置。

打开API Keys页面，里面的信息一会儿要用到。

上传数据到Algolia
在Hexo工程根目录下执行下面的语句。
npm install hexo-algolia --save
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在Hexo工程根目录的_config.yml中加入如下配置，注意改成前面API Keys页面相应配置。
algolia:
applicationID: 'your applicationID'
apiKey: 'your apiKey'
adminApiKey: 'your adminApiKey'
indexName: 'your indexName'
chunkSize: 5000

执行下面语句，必要时先进行hexo clean，确保后得到提交成功提示。
hexo algolia
1
修改NexT主题集成Algolia
在NexT主题文件夹下（这一部分不特殊指明都在这个文件夹中操作）找到_config.yml，增加aloglia配置项，如下。
algolia: true
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打开layout/_partials/head.swig，找到下面的语句。
<script type="text/javascript" id="hexo.configuration">
...
var CONFIG = {
...
}
};
</script>
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在CONFIG中增加下面的语句，相应的配置改为与API Keys页面相一致。
root: '/',
algolia: {
applicationID: 'your applicationID',
apiKey: 'your apiKey',
indexName: ''your indexName',
hits: {"per_page":10},
labels: {"input_placeholder":"搜索...","hits_empty":"未发现与 「${query}」相关的内容","hits_stats":"${hits} 条相关条目，使用了 ${time} 毫秒"}
}

打开layout/_partials/header.swig，找到相应代码并做以下修改。
...
<!-- {% set hasSearch = theme.swiftype_key || theme.tinysou_Key || config.search %} -->
<!-- 改为 -->
{% set hasSearch = theme.swiftype_key || theme.tinysou_Key || config.search || theme.algolia %}
...
{% if theme.menu %}
<ul id="menu" class="menu">
...
{% if hasSearch %}
<li class="menu-item menu-item-search">
{% if theme.swiftype_key %}
<a href="javascript:;" class="st-search-show-outputs">
{% elseif config.search %}
<a href="javascript:;" class="popup-trigger">
<!-- 增加下面语句 -->
{% elseif theme.algolia %}
<a href="javascript:;" class="popup-trigger">
<!-- 增加结束 -->
{% endif %}
{% if theme.menu_icons.enable %}
<i class="menu-item-icon fa fa-search fa-fw"></i> <br />
{% endif %}
{{ __('menu.search') }}
</a>
</li>
{% endif %}
</ul>
{% endif %}
...


在layout/_partials/search-文件夹下新增algolia.swig文件，内容如下。
<div class="algolia-popup popup">
<div class="algolia-search">
<div class="algolia-search-input-icon">
<i class="fa fa-search"></i>
</div>
<div class="algolia-search-input" id="algolia-search-input"></div>
</div>
<div class="algolia-results">
<div id="algolia-stats"></div>
<div id="algolia-hits"></div>
<div id="algolia-pagination" class="algolia-pagination"></div>
</div>
<span class="popup-btn-close">
<i class="fa fa-times-circle"></i>
</span>
</div>

打开layout/_partials/search.swig，做以下修改。
{% if theme.swiftype_key %}
{% include 'search/swiftype.swig' %}
{% elseif theme.tinysou_Key %}
{% include 'search/tinysou.swig' %}
{% elseif config.search.path %}
{% include 'search/localsearch.swig' %}
<!-- 增加下面语句 -->
{% elseif theme.algolia %}
{% include 'search/algolia.swig' %}
<!-- 增加结束 -->
{% endif %}

在source/js/src下面新增文件algolia.js，内容如下。
$(document).ready(function () {
var algoliaSettings = CONFIG.algolia;
var isAlgoliaSettingsValid = algoliaSettings.applicationID &&
algoliaSettings.apiKey &&
algoliaSettings.indexName;
if (!isAlgoliaSettingsValid) {
window.console.error('Algolia Settings are invalid.');
return;
}
var search = instantsearch({
appId: algoliaSettings.applicationID,
apiKey: algoliaSettings.apiKey,
indexName: algoliaSettings.indexName,
searchFunction: function (helper) {
var searchInput = $('#algolia-search-input').find('input');

if (searchInput.val()) {
helper.search();
}
}
});

// Registering Widgets
[
instantsearch.widgets.searchBox({
container: '#algolia-search-input',
placeholder: algoliaSettings.labels.input_placeholder
}),

instantsearch.widgets.hits({
container: '#algolia-hits',
hitsPerPage: algoliaSettings.hits.per_page || 10,
templates: {
item: function (data) {
return (
'<a href="' + CONFIG.root + data.path + '" class="algolia-hit-item-link">' +
data._highlightResult.title.value +
'</a>'
);
},
empty: function (data) {
return (
'<div id="algolia-hits-empty">' +
algoliaSettings.labels.hits_empty.replace(/\$\{query}/, data.query) +
'</div>'
);
}
},
cssClasses: {
item: 'algolia-hit-item'
}
}),

instantsearch.widgets.stats({
container: '#algolia-stats',
templates: {
body: function (data) {
var stats = algoliaSettings.labels.hits_stats
.replace(/\$\{hits}/, data.nbHits)
.replace(/\$\{time}/, data.processingTimeMS);
return (
stats +
'<span class="algolia-powered">' +
' <img src="' + CONFIG.root + 'images/algolia_logo.svg" alt="Algolia" />' +
'</span>' +
'<hr />'
);
}
}
}),

instantsearch.widgets.pagination({
container: '#algolia-pagination',
scrollTo: false,
showFirstLast: false,
labels: {
first: '<i class="fa fa-angle-double-left"></i>',
last: '<i class="fa fa-angle-double-right"></i>',
previous: '<i class="fa fa-angle-left"></i>',
next: '<i class="fa fa-angle-right"></i>'
},
cssClasses: {
root: 'pagination',
item: 'pagination-item',
link: 'page-number',
active: 'current',
disabled: 'disabled-item'
}
})
].forEach(search.addWidget, search);
search.start();
$('.popup-trigger').on('click', function(e) {
e.stopPropagation();
$('body').append('<div class="popoverlay">').css('overflow', 'hidden');
$('.popup').toggle();
$('#algolia-search-input').find('input').focus();
});
$('.popup-btn-close').click(function(){
$('.popup').hide();
$('.popoverlay').remove();
$('body').css('overflow', '');
});
});
$(document).ready(function () {
if ( $('#local-search-input').size() === 0) {
return;
}
// Popup Window;
var isfetched = false;
// Search DB path;
var search_path = "search.xml";
if (search_path.length == 0) {
search_path = "search.xml";
}
var path = "/" + search_path;
// monitor main search box;
function proceedsearch() {
$("body").append('<div class="popoverlay">').css('overflow', 'hidden');
$('.popup').toggle();
}
// search function;
var searchFunc = function(path, search_id, content_id) {
'use strict';
$.ajax({
url: path,
dataType: "xml",
async: true,
success: function( xmlResponse ) {
// get the contents from search data
isfetched = true;
$('.popup').detach().appendTo('.header-inner');
var datas = $( "entry", xmlResponse ).map(function() {
return {
title: $( "title", this ).text(),
content: $("content",this).text(),
url: $( "url" , this).text()
};
}).get();
var $input = document.getElementById(search_id);
var $resultContent = document.getElementById(content_id);
$input.addEventListener('input', function(){
var matchcounts = 0;
var str='<ul class=\"search-result-list\">';
var keywords = this.value.trim().toLowerCase().split(/[\s\-]+/);
$resultContent.innerHTML = "";
if (this.value.trim().length > 1) {
// perform local searching
datas.forEach(function(data) {
var isMatch = true;
var content_index = [];
var data_title = data.title.trim().toLowerCase();
var data_content = data.content.trim().replace(/<[^>]+>/g,"").toLowerCase();
var data_url = data.url;
var index_title = -1;
var index_content = -1;
var first_occur = -1;
// only match artiles with not empty titles and contents
if(data_title != '' && data_content != '') {
keywords.forEach(function(keyword, i) {
index_title = data_title.indexOf(keyword);
index_content = data_content.indexOf(keyword);
if( index_title < 0 && index_content < 0 ){
isMatch = false;
} else {
if (index_content < 0) {
index_content = 0;
}
if (i == 0) {
first_occur = index_content;
}
}
});
}
// show search results
if (isMatch) {
matchcounts += 1;
str += "<li><a href='"+ data_url +"'>"+ data_title +"</a>";
var content = data.content.trim().replace(/<[^>]+>/g,"");
if (first_occur >= 0) {
// cut out 100 characters
var start = first_occur - 20;
var end = first_occur + 80;
if(start < 0){
start = 0;
}
if(start == 0){
end = 50;
}
if(end > content.length){
end = content.length;
}
var match_content = content.substring(start, end);
// highlight all keywords
keywords.forEach(function(keyword){
var regS = new RegExp(keyword, "gi");
match_content = match_content.replace(regS, "<b class=\"search-keyword\">"+keyword+"</b>");
});
str += "<p class=\"search-result\">" + match_content +"...</p>"
}
str += "</li>";
}
})};
str += "</ul>";
if (matchcounts == 0) { str = '<div id="no-result"><i class="fa fa-frown-o fa-5x" /></div>' }
if (keywords == "") { str = '<div id="no-result"><i class="fa fa-search fa-5x" /></div>' }
$resultContent.innerHTML = str;
});
proceedsearch();
}
});}
// handle and trigger popup window;
$('.popup-trigger').mousedown(function(e) {
e.stopPropagation();
if (isfetched == false) {
searchFunc(path, 'local-search-input', 'local-search-result');
} else {
proceedsearch();
};
});
$('.popup-btn-close').click(function(e){
$('.popup').hide();
$(".popoverlay").remove();
$('body').css('overflow', '');
});
$('.popup').click(function(e){
e.stopPropagation();
});
});

在layout/_scripts/third_party文件夹下增加文件algolia.swig，内容如下。
{%
set js_algolia = [
'src/algolia.js'
]
%}
{% for common in js_algolia %}
{# S: Include Algolia instantsearch.js library #}
{% set algolia_instant_css = url_for(theme.vendors._internal + '/algolia-instant-search/instantsearch.min.css') %}
{% if theme.vendors.algolia_instant_css %}
{% set algolia_instant_css = theme.vendors.algolia_instant_css %}
{% endif %}
<link rel="stylesheet" href="{{ algolia_instant_css }}">

{% set algolia_instant_js = url_for(theme.vendors._internal + '/algolia-instant-search/instantsearch.min.js') %}
{% if theme.vendors.algolia_instant_js %}
{% set algolia_instant_js = theme.vendors.algolia_instant_js %}
{% endif %}
<script src="{{ algolia_instant_js }}"></script>
{# E: Include Algolia instantsearch.js library #}

<script type="text/javascript" src="{{ url_for(theme.js) }}/{{ common }}?v={{ theme.version }}"></script>
{% endfor %}


在layout/_scripts/_layout.swig文件的body标签内添加下面的语句。
{% if theme.algolia %}
{% include '_scripts/third-party/algolia.swig' %}
{% endif %}

在source/css下新建文件夹_algolia，新建文件algolia.styl，内容如下。
ul.search-result-list {
padding-left: 0px;
margin: 0px 5px 0px 8px;
}
p.search-result {
border-bottom: 1px dashed #ccc;
padding: 5px 0;
}
a.search-result-title {
font-weight: bold;
}
a.search-result {
border-bottom: transparent;
display: block;
white-space: nowrap;
overflow: hidden;
text-overflow: ellipsis;
}
.search-keyword {
border-bottom: 1px dashed #4088b8;
font-weight: bold;
}
#local-search-result {
height: 90%;
overflow: auto;
}
.popup {
display: none;
position: fixed;
top: 10%;
left: 50%;
width: 700px;
height: 80%;
margin-left: -350px;
padding: 3px 0 0 10px;
background: #fff;
color: #333;
z-index: 9999;
border-radius: 5px;
}
@media (max-width: 767px) {
.popup {
padding: 3px;
top: 0;
left: 0;
margin: 0;
width: ;
height: ;
border-radius: 0px;
}
}
.popoverlay {
position: fixed;
width: ;
height: ;
top: 0px;
left: 0px;
z-index: 2080;
background-color: rgba(0,0,0,0.3);
}
#local-search-input {
margin-bottom: 10px;
width: 50%;
}
.popup-btn-close {
position: absolute;
top: 6px;
right: 14px;
color: #4ebd79;
font-size: 14px;
font-weight: bold;
text-transform: uppercase;
cursor: pointer;
}
#no-result {
position: absolute;
left: 44%;
top: 42%;
color: #ccc;
}
.busuanzi-count:before {
content: " ";
float: left;
width: 260px;
min-height: 25px;
}
@media (min-width: 768px) and (max-width: 991px) {
.busuanzi-count {
width: auto;
}
.busuanzi-count:before {
display: none;
}
}
@media (max-width: 767px) {
.busuanzi-count {
width: auto;
}
.busuanzi-count:before {
display: none;
}
}
.site-uv,
.site-pv,
.page-pv {
display: inline-block;
}
.site-uv .busuanzi-value,
.site-pv .busuanzi-value,
.page-pv .busuanzi-value {
margin: 0 5px;
}
.site-uv {
margin-right: 10px;
}
.site-uv::after {
content: "|";
padding-left: 10px;
}
.algolia-popup {
overflow: hidden;
padding: 0;
}
.algolia-popup .popup-btn-close {
padding-left: 15px;
border-left: 1px solid #eee;
top: 10px;
}
.algolia-popup .popup-btn-close .fa {
color: #999;
font-size: 18px;
}
.algolia-popup .popup-btn-close:hover .fa {
color: #222;
}
.algolia-search {
padding: 10px 15px 5px;
max-height: 50px;
border-bottom: 1px solid #ccc;
background: #f5f5f5;
border-top-left-radius: 5px;
border-top-right-radius: 5px;
}
.algolia-search-input-icon {
display: inline-block;
width: 20px;
}
.algolia-search-input-icon .fa {
font-size: 18px;
}
.algolia-search-input {
display: inline-block;
width: calc(90% - 20px);
}
.algolia-search-input input {
padding: 5px 0;
width: ;
outline: none;
border: none;
background: transparent;
}
.algolia-powered {
float: right;
}
.algolia-powered img {
display: inline-block;
height: 18px;
vertical-align: middle;
}
.algolia-results {
position: relative;
overflow: auto;
padding: 10px 30px;
height: calc( - 50px);
}
.algolia-results hr {
margin: 10px 0;
}
.algolia-results .highlight {
font-style: normal;
margin: 0;
padding: 0 2px;
font-size: inherit;
color: #f00;
}
.algolia-hits {
margin-top: 20px;
}
.algolia-hit-item {
margin: 15px 0;
}
.algolia-hit-item-link {
display: block;
border-bottom: 1px dashed #ccc;
transition-duration: 0.2s;
transition-timing-function: ease-in-out;
transition-delay: 0s;
}
.algolia-pagination .pagination {
margin-top: 40px;
border-top: none;
padding: 0;
}
.algolia-pagination .pagination-item {
display: inline-block;
}
.algolia-pagination .page-number {
border-top: none;
}
.algolia-pagination .page-number:hover {
border-bottom: 1px solid #222;
}
.algolia-pagination .disabled-item {
visibility: hidden;
}

在source/css/main.styl文件的后新增下面语句。
@import "_algolia/algolia";
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将下面的图片放置于Hexo根目录下source文件夹下的images文件夹中，命名为algolia_logo.svg。

效果图
经过漫长的修改终于成功了，效果图如下。

写在后
为NexT主题添加Algolia搜索是一件复杂的事情，好消息是现在已经有版本在支持，但是还在开发阶段，未来一定会像多说等等集成在NexT主题中，但是到那个时候，旧版本升级到新版本会不会有很多不适配什么的，所以如果你想用，不如按照我的方法自己添加。

如果按照我的方式不行的话，应该是在使用的NexT主题在哪个地方和我目前的版本不太一样，需要自己进行调整了。
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版权声明：本文为CSDN博主「_海阔天空」的原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/luzheqi/article/details/52798557