package com.reactlibrary.bundle;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Enumeration;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;

/**
 * 解压React的Bundle的zip包
 * Created by MJX on 2017/3/30.
 */
public class DecompressionUtil {

    /**
     * 解压文件
     *
     * @param zipFile
     * @param descDir
     */
    public static void unZipFile(File zipFile, String descDir) {
        File pathFile = new File(descDir);
        if (!pathFile.exists()) {
            pathFile.mkdirs();
        }
        ZipFile zip = null;
        try {
            zip = new ZipFile(zipFile);
            for (Enumeration entries = zip.entries(); entries.hasMoreElements(); ) {
                ZipEntry entry = (ZipEntry) entries.nextElement();
                String zipEntryName = entry.getName();
                InputStream in = zip.getInputStream(entry);
                String outPath = (descDir + zipEntryName).replaceAll("\\*", "/");
                ;
                //判断路径是否存在,不存在则创建文件路径
                File file = new File(outPath.substring(0, outPath.lastIndexOf('/')));
                if (!file.exists()) {
                    file.mkdirs();
                }
                //判断文件全路径是否为文件夹,如果是上面已经上传,不需要解压
                if (new File(outPath).isDirectory()) {
                    continue;
                }
                //输出文件路径信息
                OutputStream out = new FileOutputStream(outPath);
                byte[] buf1 = new byte[1024];
                int len;
                while ((len = in.read(buf1)) > 0) {
                    out.write(buf1, 0, len);
                }
                in.close();
                out.close();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}