using System.IO.Compression;

namespace MesETL.Shared.Compression;

/// <summary>
/// Deflate压缩工具类
/// </summary>
public static class DeflateArchive
{
    /// <summary>
    /// 解压Deflate
    /// </summary>
    /// <param name="input"></param>
    /// <returns></returns>
    public static byte[] Decompress(byte[] input)
    {
        using var msi = new MemoryStream(input);
        using var mso = new MemoryStream();
        using var ds = new DeflateStream(msi, CompressionMode.Decompress);
        ds.CopyTo(mso);
        ds.Flush();
        return mso.ToArray();
    }

    /// <summary>
    /// 压缩Deflate
    /// </summary>
    /// <param name="input"></param>
    /// <returns></returns>
    public static byte[] Compress(byte[] input)
    {
        using var msi = new MemoryStream(input);
        using var mso = new MemoryStream();
        using var ds = new DeflateStream(mso, CompressionMode.Compress);
        msi.CopyTo(ds);
        ds.Flush();
        return mso.ToArray();
    }
}