import { strFromU8, strToU8, unzlibSync, zlibSync } from 'fflate/browser';
/**
 * Encode and compress data
 *
 * 编码和压缩数据
 *
 * @param data - Data to encode / 要编码的数据
 * @param level - Compression level / 压缩级别
 *
 * @returns Base64 encoded compressed data / Base64 编码的压缩数据
 */
export const encodeData = (data, level = 6) => {
    const buffer = strToU8(data);
    // zlib headers can be found at https://stackoverflow.com/a/54915442
    const zipped = zlibSync(buffer, { level });
    const binary = strFromU8(zipped, true);
    return __VUEPRESS_SSR__
        ? Buffer.from(binary, 'binary').toString('base64')
        : btoa(binary);
};
/**
 * Decode and unzip data
 *
 * 解码和解压数据
 *
 * @param base64 - Base64 encoded data / Base64 编码的数据
 *
 * @returns Decoded string / 解码后的字符串
 */
export const decodeData = (base64) => {
    const binary = __VUEPRESS_SSR__
        ? Buffer.from(base64, 'base64').toString('binary')
        : atob(base64);
    return strFromU8(unzlibSync(strToU8(binary, true)));
};