const iconv = require('iconv-lite');
const fs = require('fs');
const Path = require('path');

const INPUT_ROOT = './wwwroot'; // 等待转换的文件夹
const OUTPUT_ROOT = './dist/'; // 输出到哪个文件夹

if (!fs.existsSync(OUTPUT_ROOT)) {
    fs.mkdirSync(OUTPUT_ROOT);
}

// 以下的格式将会转换编码
const FORMATS = ['.htm', '.php', '.js', '.txt', '.html', '.css', '.xml', '.json'];

tree(INPUT_ROOT);

function tree(dir) {
    fs.mkdirSync(OUTPUT_ROOT + dir);
    fs.readdirSync(dir).forEach(v => {
        const path = dir + '/' + v;
        const stat = fs.statSync(path);
        if (stat.isDirectory()) {
            tree(path);
        } else {
            const format = Path.extname(v);
            if (FORMATS.indexOf(format) === -1) {
                fs.copyFileSync(path, OUTPUT_ROOT + path);
                return;
            }

            fs.createReadStream(path)
                .pipe(iconv.decodeStream('gbk'))
                .pipe(iconv.encodeStream('utf8'))
                .pipe(fs.createWriteStream(OUTPUT_ROOT + path));

            console.log(path);
        }
    });
}