/// <summary>
/// 文件压缩类
/// </summary>
public class ZipHelper
{
    /// <summary>
    /// 单文件压缩成ZIP
    /// </summary>
    /// <param name="fileSource">源文件路径</param>
    /// <param name="fileOut">ZIP文件路径</param>
    /// <param name="fileName">ZIP文件名：相对路径</param>
    /// <returns></returns>
    public static void SimpleFileZip(string fileSource, string fileOut, string fileName)
    {
        using (FileStream zipFileToOpen = new FileStream(fileOut, FileMode.OpenOrCreate))
        {
            using (ZipArchive archive = new ZipArchive(zipFileToOpen, ZipArchiveMode.Update))
            {
                fileName = fileName.Trim(Path.DirectorySeparatorChar);
                ZipFile(fileSource, fileName, archive);
            }
        }
    }

    /// <summary>
    /// 多文件压缩成ZIP
    /// </summary>
    /// <param name="fileSource">源文件路径</param>
    /// <param name="fileOut">ZIP文件路径</param>
    /// <param name="fileName">ZIP文件名</param>
    /// <returns></returns>
    public static void FilesZip(List<string> fileSources, string fileOut)
    {
        using (FileStream zipFileToOpen = new FileStream(fileOut, FileMode.OpenOrCreate))
        {
            using (ZipArchive archive = new ZipArchive(zipFileToOpen, ZipArchiveMode.Update))
            {
                foreach (var file in fileSources)
                {
                    string fileName = file.Replace(AppConsts.ServerUpdateFile + Path.DirectorySeparatorChar, "");
                    ZipFile(file, fileName, archive);
                }
            }
        }
    }

    /// <summary>
    /// 压缩指定文件夹
    /// </summary>
    /// <param name="sourceDirectory"></param>
    /// <param name="fileOut"></param>
    public static void DirectoryZip(string sourceDirectory, string fileOut)
    {
        string[] allFiles = Directory.GetFiles(sourceDirectory, "", SearchOption.AllDirectories);
        using (FileStream zipFileToOpen = new FileStream(fileOut, FileMode.OpenOrCreate))
        {
            using (ZipArchive archive = new ZipArchive(zipFileToOpen, ZipArchiveMode.Update))
            {
                foreach (var file in allFiles)
                {
                    //获取压缩文件相对目录
                    string fileName = file.Replace(sourceDirectory + Path.DirectorySeparatorChar, "");
                    ZipFile(file, fileName, archive);
                }
            }
        }
    }

    /// <summary>
    /// 解压文件到指定目录
    /// </summary>
    /// <param name="upZipDirPath"></param>
    /// <param name="zipPath"></param>
    public static void UnZip(string upZipDirPath, string zipPath)
    {
        if (!Directory.Exists(upZipDirPath))
            Directory.CreateDirectory(upZipDirPath);
        using (FileStream zipFileToOpen = new FileStream(zipPath, FileMode.Open))
        {
            using (ZipArchive archive = new ZipArchive(zipFileToOpen, ZipArchiveMode.Read))
            {
                archive.ExtractToDirectory(upZipDirPath);
            }
        }
    }

    /// <summary>
    /// 生成压缩文件
    /// </summary>
    /// <param name="fileSource">源文件</param>
    /// <param name="fileName">压缩文件相对目录</param>
    /// <param name="archive">压缩文件包</param>
    private static void ZipFile(string fileSource, string fileName, ZipArchive archive)
    {
        ZipArchiveEntry readMeEntry = archive.CreateEntry(fileName);
        readMeEntry.LastWriteTime = File.GetLastWriteTime(fileSource);
        using (Stream stream = readMeEntry.Open())
        {
            byte[] bytes = File.ReadAllBytes(fileSource);
            stream.Write(bytes, 0, bytes.Length);
        }
    }
}