灵感
想给自已的blog添加一个相册功能、给生活中的点点滴滴留影记录。搜寻网络上给Next主题添加相册功能的基本上没有，只能重头到尾开始一点点的实践。
大致的想法：
1. 相册展示类似于归档一样，按时间戳来分类
2.每一个时间节点都是一个小相册，展示的时候上面是相册的标题，下面是几张经典图片的缩略图
3.点击标题，进行相册的详细页面，可以看到更多关于这个小相册的图片
4.相册展示的特效类似于Lawlite
实践
插件开发实践
由于Hexo基于NodeJS开发的，通过插件的方式集成一些第三方的功能。比如归档是 通过hexo-generator-archive实现的，标签页是通过hexo-generator-tag实现的。更多Hexo插件请看Hexo Plugins.这里就不过多讨论。
本次实践修改的插件有：
1.hexo-generator-archive
2.hexo-generator-index
2.hexo-generator-category
4.hexo-generator-photo[自已新增的]
每一个小相册都是一个MD文件,每次首页和归档生成的时候都会把相册加载进去。我想让相册和博客进行区别，所以在MD文件的开头会声明一个属性isPhoto,true表示相册、false表示普通博客文章。
hexo-generator-archive和hexo-generator-index中去除相册的展示。
修改插件的libgenerator.js文件，在exports函数，变量声明完加上如下一段代码。
//过滤所有的文章
function filterPhoto(posts){
var tmp = [];
posts.forEach(function(post) {
var isPhoto = post.isPhoto; //相册
if(!isPhoto){
tmp.push(post);
}
});
posts.data = tmp;
posts.length = tmp.length;
}
//hexo-generator-index中调用
filterPhoto(posts);
//hexo-generator-archive中调用
filterPhoto(allPosts);
归档的时候会显示所有文章的总数（包含相册）,通过下列方式去除掉。
在hexo-generator-archive插件的libgenerator.js文件添加如下注释的代码：
function generate(path, posts, options) {
options = options || {};
options.archive = true;
options.postLength = allPosts.length; //新增的
修改归档的展示页面代码（themes
extlayoutarchive.swig）：
将site.posts.length改为page.postLength即可。
新增hexo-generator-photo插件，自动生成相册时间戳界面,参考hexo-generator-archive插件。
拷贝hexo-generator-archive的源码，主要修改以下几个文件：
1.index.js：
/* global hexo */
'use strict';
var assign = require('object-assign');
// when archive disabled pagination, per_page should be 0.
var per_page;
if (hexo.config.photo === 1) {
per_page = 0;
} else if (typeof hexo.config.per_page === 'undefined') {
per_page = 10;
} else {
per_page = hexo.config.per_page;
}
hexo.config.photo_generator = assign({
per_page: per_page,
yearly: true,
monthly: true,
daily: false
}, hexo.config.photo_generator);
hexo.extend.generator.register('photo', require('./lib/generator'));
2.package.json：
{
"name": "hexo-generator-photo",
"version": "0.0.1",
"description": "photo generator for Hexo.",
"main": "index",
"scripts": {
"eslint": "eslint .",
"jscs": "jscs .",
"test": "mocha test/index.js",
"test-cov": "istanbul cover --print both _mocha -- test/index.js"
},
"directories": {
"lib": "./lib"
},
"repository": "hexojs/hexo-generator-photo",
"homepage": "http://hexo.io/",
"keywords": [
"hexo",
"generator",
"photo"
],
"author": "",
"license": "",
"devDependencies": {
"chai": "^1.9.1",
"eslint": "^1.10.3",
"eslint-config-hexo": "^1.0.2",
"hexo": "^3.1.1",
"istanbul": "^0.4.1",
"jscs": "^2.7.0",
"jscs-preset-hexo": "^1.0.1",
"mocha": "^2.0.1"
},
"dependencies": {
"hexo-pagination": "0.0.2",
"object-assign": "^2.0.0"
}
}
3.generator.js：
'use strict';
var pagination = require('hexo-pagination');
var fmtNum = function(num) {
return num < 10 ? '0' + num : num;
};
module.exports = function(locals) {
var config = this.config;
var photoDir = config.photo_dir;
var paginationDir = config.pagination_dir || 'page';
var allPosts = locals.posts.sort('-date');
var perPage = config.photo_generator.per_page;
var result = [];
if (!allPosts.length) return;
function screenPhoto(posts){
var tmp = [];
posts.forEach(function(post) {
var isPhoto = post.isPhoto; //相册
if(isPhoto){
tmp.push(post);
}
});
posts.data = tmp;
posts.length = tmp.length;
}
screenPhoto(allPosts);
if (photoDir[photoDir.length - 1] !== '/') photoDir += '/';
function generate(path, posts, options) {
options = options || {};
options.photo = true;
options.postLength = allPosts.length;
result = result.concat(pagination(path, posts, {
perPage: perPage,
layout: ['photo', 'index'],
format: paginationDir + '/%d/',
data: options
}));
}
generate(photoDir, allPosts);
if (!config.photo_generator.yearly) return result;
var posts = {};
// Organize posts by date
allPosts.forEach(function(post) {
var date = post.date;
var year = date.year();
var month = date.month() + 1; // month is started from 0
if (!posts.hasOwnProperty(year)) {
// 13 arrays. The first array is for posts in this year
// and the other arrays is for posts in this month
posts[year] = [
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[]
];
}
posts[year][0].push(post);
posts[year][month].push(post);
// Daily
if (config.photo_generator.daily) {
var day = date.date();
if (!posts[year][month].hasOwnProperty(day)) {
posts[year][month].day = {};
}
(posts[year][month].day[day] || (posts[year][month].day[day] = [])).push(post);
}
});
var Query = this.model('Post').Query;
var years = Object.keys(posts);
var year, data, month, monthData, url;
// Yearly
for (var i = 0, len = years.length; i < len; i++) {
year = +years[i];
data = posts[year];
url = photoDir + year + '/';
if (!data[0].length) continue;
generate(url, new Query(data[0]), {year: year});
if (!config.photo_generator.monthly && !config.photo_generator.daily) continue;
// Monthly
for (month = 1; month <= 12; month++) {
monthData = data[month];
if (!monthData.length) continue;
if (config.photo_generator.monthly) {
generate(url + fmtNum(month) + '/', new Query(monthData), {
year: year,
month: month
});
}
if (!config.photo_generator.daily) continue;
// Daily
for (var day = 1; day <= 31; day++) {
var dayData = monthData.day[day];
if (!dayData || !dayData.length) continue;
generate(url + fmtNum(month) + '/' + fmtNum(day) + '/', new Query(dayData), {
year: year,
month: month,
day: day
});
}
}
}
return result;
};
hexo执行调用Hexo-generator-photo插件：
网站根目录的package.json文件中添加如下一行：
"hexo-server": "^0.2.0", //下面添加,不要遗漏","
"hexo-generator-photo":"^0.0.1"
相册样式调整
新增相册的swig文件（themes
extlayoutphoto.swig）：
{% extends '_layout.swig' %}
{% import '_macro/post-collapse-photo.swig' as post_template %}
{% import '_macro/sidebar.swig' as sidebar_template %}
{% block title %}{{ __('title.photo') }} | {{ config.title }}{% endblock %}
{% block page_class %} page-archive {% endblock %}
{% block content %}
<section id="posts" class="posts-collapse">
{% for post in page.posts %}
{# Show year #}
{% set year %}
{% set post.year = date(post.date, 'YYYY') %}
{% if post.year !== year %}
{% set year = post.year %}
<div class="collection-title">
<h2 class="archive-year motion-element" id="archive-year-{{ year }}">{{ year }}</h2>
</div>
{% endif %}
{# endshow #}
{{ post_template.render(post) }}
{% endfor %}
</section>
{% include '_partials/pagination.swig' %}
{% endblock %}
{% block sidebar %}
{{ sidebar_template.render(false) }}
{% endblock %}
{% block script_extra %}
{% if theme.use_motion %}
<script type="text/javascript" id="motion.page.archive">
$('.archive-year').velocity('transition.slideLeftIn');
</script>
{% endif %}
{% endblock %}
添加相册子标题模板（themes
extlayout\_macropost-collapse-photo.swig）：
{% macro render(post) %}
<article class="post post-type-{{ post.type | default('normal') }}" itemscope itemtype="http://schema.org/Article">
<header class="post-header2">
<{% if theme.seo %}h3{% else %}h2{% endif %} class="post-title">
{% if post.link %}{# Link posts #}
<a class="post-title-link post-title-link-external" target="_blank" href="{{ url_for(post.link) }}" itemprop="url">
{{ post.title or post.link }}
<i class="fa fa-external-link"></i>
</a>
{% else %}
<a class="post-title-link" href="{{ url_for(post.path) }}" itemprop="url">
{% if post.type === 'picture' %}
{{ post.content }}
{% else %}
<span itemprop="name">{{ post.title | default(__('post.untitled')) }}</span>
{% endif %}
</a>
{% endif %}
</{% if theme.seo %}h3{% else %}h2{% endif %}>
<div>
<ul class="box">
{% for photo in post.photos %}
<figure class="thumb"><img src="{{photo}}" alt=""></figure>
{% endfor %}
</ul>
</div>
<div class="post-meta">
<time class="post-time" itemprop="dateCreated"
datetime="{{ moment(post.date).format() }}"
content="{{ date(post.date, config.date_format) }}" >
{{ date(post.date, 'MM-DD') }}
</time>
</div>
</header>
</article>
{% endmacro %}
新增样式（themes
extsourcecss\_customcustom.styl）：
box{ 100%;}
.box li{ float:left; 100px; height:80px; margin-right:10px; padding:0; margin:5px; overflow:hidden;list-style:none;}
.posts-collapse .post-header2 {
position: relative;
transition-duration: 0.2s;
transition-timing-function: ease-in-out;
transition-delay: 0s;
transition-property: border;
}
.thumb{
25%;
height: 0;
padding-bottom: 25%;
position: relative;
display: inline-block;
text-align: center;
margin:0px;
}
.thumb img{
display: inline;
margin: auto;
max- 100%;
height: auto;
}
相册配置
站点文件配置（_config.yml）新增如下配置：
# Directory节点添加如下配置
photo_dir: photos //添加Photo生成目录
//Photo生成配置
photo_generator:
per_page: 3 //默认展示的条数
yearly: true
monthly: true
主题文件配置（_config.yml）新增如下配置
menu: //menu节点添加如下一行
photos: /photos/
menu_icons: //menu节点下添加如下一行
photos: book
中文显示（themes extlanguageszh-Hans.yml）：
title: //节点下添加如下一行
photo: 相册
menu： //节点下添加如下一行
photos: 相册
测试
source\_posts目录下添加相册的MD文件，内容如下：
---
title: 王二狗是个大帅哥
date: 2017-06-17 10:26:32
comments: false
photos: ["http://img5.duitang.com/uploads/item/201508/10/20150810153526_2ifjW.jpeg","http://img5.duitang.com/uploads/item/201508/10/20150810153526_2ifjW.jpeg","http://img5.duitang.com/uploads/item/201508/10/20150810153526_2ifjW.jpeg","http://img5.duitang.com/uploads/item/201508/10/20150810153526_2ifjW.jpeg","http://img5.duitang.com/uploads/item/201508/10/20150810153526_2ifjW.jpeg","http://img5.duitang.com/uploads/item/201508/10/20150810153526_2ifjW.jpeg","http://img5.duitang.com/uploads/item/201508/10/20150810153526_2ifjW.jpeg","http://img5.duitang.com/uploads/item/201508/10/20150810153526_2ifjW.jpeg"]
isPhoto: true
---
通过`Hexo server`启动服务，访问`http://localhost:4000/photos/`即可看到生成的相册界面。
心得 总结
安装Hexo之后，插件默认存放在blog
ode_modules目录下。
插件开发的核心文件:index.js,package.json,generator.js
关于插件开发的Demo：Plugin Demo