/
assist.js
142 lines (125 loc) · 4.37 KB
/
assist.js
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var fs = require('fs');
var fse = require('fs-extra');
var path = require('path');
var os = require('os');
const imagemin = require('imagemin');
const imageminPngquant = require('imagemin-pngquant');
const imageminJpegRecompress = require('imagemin-jpeg-recompress');
var errorLog = (err)=>{
fse.outputFile(getCompressConfig().savePath + '/image-compress-build/error.log', err)
}
exports.errorLog = errorLog;
var getImgList = (paths) => {
var imgList = [];
var getImgs = (dropPaths) => {
dropPaths.forEach(pathStr => {
var pathNormalize = normalizePath(pathStr);
var pathInfo = fs.lstatSync(pathNormalize);
if (pathInfo.isDirectory()) {
var dirPathList = fs.readdirSync(pathNormalize);
if (dirPathList.length > 0) {
dirPathList = dirPathList.map((item) => {
return path.join(pathNormalize, item)
})
getImgs(dirPathList)
}
} else {
var fileExtname = path.extname(pathNormalize).toLowerCase();
if (['.jpg', '.png'].indexOf(fileExtname) > -1) {
imgList.push({
path: pathNormalize,
size: pathInfo.size
})
}
}
})
}
getImgs(paths)
return imgList;
}
exports.getImgList = getImgList;
function getDeaktopDir() {
return normalizePath(os.homedir() + '/Desktop')
}
exports.getDeaktopDir = getDeaktopDir;
function normalizePath(pathSrc) {
return pathSrc.replace(/\\/g, "/")
}
exports.normalizePath = normalizePath;
var configFilePath = './compress-config.json'
function saveCompressConfig(setting) {
fse.ensureFile(configFilePath).then(() => {
if (setting.quality1 > setting.quality2) {
var qualityMin = setting.quality2;
var qualityMax = setting.quality1;
} else {
var qualityMin = setting.quality1;
var qualityMax = setting.quality2;
}
var jsonStr = {
"savePath": setting.savePath,
"plugins": {
"imageminJpegRecompress": {
"jpgQuality": setting.jpgQuality
},
"imageminPngquant": {
"qualityMin": qualityMin,
"qualityMax": qualityMax,
"speed": setting.speed
}
}
}
fse.writeJSON(configFilePath, jsonStr)
});
}
exports.saveCompressConfig = saveCompressConfig;
function getCompressConfig() {
if (fs.existsSync(configFilePath)) {
return fse.readJSONSync(configFilePath)
} else {
var defaultConfig = {
"savePath": getDeaktopDir(),
"plugins": {
"imageminJpegRecompress": {
"jpgQuality": 'high'
},
"imageminPngquant": {
"qualityMin": 65,
"qualityMax": 80,
"speed": 3
}
}
}
fse.writeJsonSync(configFilePath, defaultConfig);
return defaultConfig;
}
}
exports.getCompressConfig = getCompressConfig;
var pluginsConfig = null;
function imageCompressHandle(imgPathList, callback) {
if(!pluginsConfig){
pluginsConfig = getCompressConfig();
}
imagemin(imgPathList, path.join(pluginsConfig.savePath,'image-compress-build') , {
plugins: [
imageminPngquant({
quality: pluginsConfig.plugins.imageminPngquant.qualityMin + '-' + pluginsConfig.plugins.imageminPngquant.qualityMax,
speed: pluginsConfig.plugins.imageminPngquant.speed
}),
imageminJpegRecompress({
accurate: true,//高精度模式
quality: pluginsConfig.plugins.imageminJpegRecompress.jpgQuality,//图像质量:low, medium, high and veryhigh;
method: "smallfry",//网格优化:mpe, ssim, ms-ssim and smallfry;
min: 60,//最低质量
loops: 0,//循环尝试次数, 默认为6;
progressive: false,//基线优化
subsample: "default"//子采样:default, disable;
})
]
}).then(files => {
callback()
}).catch(err => {
errorLog(err)
});
}
exports.imageCompressHandle = imageCompressHandle;