hexo-yam/lib/filter.js

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/* global hexo */
'use strict'
const CleanCSS = require('clean-css')
const Terser = require('terser')
const Htmlminifier = require('html-minifier').minify
const Promise = require('bluebird')
const minimatch = require('minimatch')
const zlib = require('zlib')
const br = require('iltorb')
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function logicHtml (str, data) {
const hexo = this
const options = hexo.config.neat_html
// Return if disabled.
if (options.enable === false) return
let path = data.path
let exclude = options.exclude
if (exclude && !Array.isArray(exclude)) exclude = [exclude]
if (path && exclude && exclude.length) {
for (let i = 0, len = exclude.length; i < len; i++) {
if (minimatch(path, exclude[i], { matchBase: true })) return str
}
}
let result = Htmlminifier(str, options)
let saved = ((str.length - result.length) / str.length * 100).toFixed(2)
if (options.logger) {
let log = hexo.log || console.log
log.log('Minify the html: %s [%s saved]', path, saved + '%')
}
return result
}
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function logicCss (str, data) {
const hexo = this
const options = hexo.config.neat_css
// Return if disabled.
if (options.enable === false) return
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let path = data.path
let exclude = options.exclude
if (exclude && !Array.isArray(exclude)) exclude = [exclude]
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if (path && exclude && exclude.length) {
for (let i = 0, len = exclude.length; i < len; i++) {
if (minimatch(path, exclude[i], { matchBase: true })) return str
}
}
return new Promise(function (resolve, reject) {
new CleanCSS({ level: 2 }).minify(str, function (err, result) {
if (err) return reject(err)
let saved = ((str.length - result.styles.length) / str.length * 100).toFixed(2)
resolve(result.styles)
if (options.logger) {
let log = hexo.log || console.log
log.log('Minify the css: %s [%s saved]', path, saved + '%')
}
})
})
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}
function logicJs (str, data) {
const hexo = this
const options = hexo.config.neat_js
// Return if disabled.
if (options.enable === false) return
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let path = data.path
let exclude = options.exclude
if (exclude && !Array.isArray(exclude)) exclude = [exclude]
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if (path && exclude && exclude.length) {
for (let i = 0, len = exclude.length; i < len; i++) {
if (minimatch(path, exclude[i], { matchBase: true })) return str
}
}
// Terser doesn't like unsupported options
delete options.enable
delete options.exclude
let jsLogger = options.logger
delete options.logger
let result = Terser.minify(str, options)
let saved = ((str.length - result.code.length) / str.length * 100).toFixed(2)
if (jsLogger) {
let log = hexo.log || console.log
log.log('Minify the js: %s [%s saved]', path, saved + '%')
}
return result.code
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}
function logicGzip () {
const hexo = this
const options = hexo.config.neat_gzip
// Return if disabled.
if (options.enable === false) return
let route = hexo.route
let routeList = route.list()
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return Promise.all(routeList.filter(path => (path.endsWith('.html') || path.endsWith('.js') || path.endsWith('.css') || path.endsWith('.xml') || path.endsWith('.json'))).map(path => {
return new Promise((resolve, reject) => {
// Grab all assets using hexo router
let assetPath = route.get(path)
let assetTxt = ''
// Extract the content
assetPath.on('data', (chunk) => (assetTxt += chunk))
assetPath.on('end', () => {
if (assetTxt.length) {
// gzip compress using highest level
zlib.gzip(assetTxt, { level: zlib.Z_BEST_COMPRESSION }, (err, Input) => {
if (!err) {
// Save the compressed file to .gz
route.set(path + '.gz', Input)
// Logging
let saved = ((assetTxt.length - Input.toString().length) / assetTxt.length * 100).toFixed(2)
if (options.logger) {
let log = hexo.log || console.log
log.log('Gzip-compressed %s [%s saved]', path, saved + '%')
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}
resolve(assetTxt)
} else {
reject(err)
}
})
}
})
})
}))
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}
function logicBrotli () {
const hexo = this
const options = hexo.config.neat_brotli
// Return if disabled.
if (options.enable === false) return
let route = hexo.route
let routeList = route.list()
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return Promise.all(routeList.filter(path => (path.endsWith('.html') || path.endsWith('.js') || path.endsWith('.css') || path.endsWith('.xml') || path.endsWith('.json'))).map(path => {
return new Promise((resolve, reject) => {
// Grab all assets using hexo router
let assetPath = route.get(path)
let assetTxt = ''
// Extract the content
assetPath.on('data', (chunk) => (assetTxt += chunk))
assetPath.on('end', () => {
if (assetTxt.length) {
// Input has to be buffer for brotli
let input = new Buffer.from(assetTxt, 'utf-8')
// brotli compress using highest level
br.compress(input, { quality: br.BROTLI_MAX_QUALITY }, (err, output) => {
if (!err) {
// Save the compressed file to .br
route.set(path + '.br', output)
// Logging
let saved = ((input.length - output.toString().length) / input.length * 100).toFixed(2)
if (options.logger) {
let log = hexo.log || console.log
log.log('Brotli-compressed %s [%s saved]', path, saved + '%')
}
resolve(assetTxt)
} else {
reject(err)
}
})
}
})
})
}))
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}
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module.exports = {
logicHtml: logicHtml,
logicCss: logicCss,
logicJs: logicJs,
logicGzip: logicGzip,
logicBrotli: logicBrotli
}