C.B.R.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using SevenZip;

namespace CBR.Core.Helpers
{
    public class ZipHelper
    {
        #region ----------------SINGLETON----------------
        public static readonly ZipHelper Instance = new ZipHelper();

		/// <summary>
		/// Private constructor for singleton pattern
		/// </summary>
        private ZipHelper()
		{
            //be sure 7zip is initialized
            SevenZipExtractor.SetLibraryPath(Path.Combine(DirectoryHelper.DependenciesPath, "7z.dll"));
		}

		#endregion

        public SevenZipExtractor GetExtractor( string filePath )
        {
            SevenZipExtractor temp = null;
            try
            {
                temp = new SevenZipExtractor(filePath);
            }
            catch (Exception err)
            {
                ExceptionHelper.Manage("ZipHelper:GetExtractor", err);
                ReleaseExtractor(temp);
            }

            return temp;
        }

        public void ReleaseExtractor(SevenZipExtractor extractor)
        {
            if (extractor != null)
            {
                extractor.Dispose();
                extractor = null;
            }
        }
        
        #region ----------------FOLDERS----------------

        public bool CompressFolder(string outputFileName, string inputFolder, out int resultCount)
        {
            SevenZip.SevenZipCompressor cp = null;
            try
            {
                cp = new SevenZip.SevenZipCompressor();
                cp.ArchiveFormat = SevenZip.OutArchiveFormat.Zip;

                string[] outputFiles = new DirectoryInfo(inputFolder).GetFiles("*.*").Select(p => p.FullName).ToArray();

                using (FileStream fs = new FileStream(outputFileName, FileMode.Create))
                {
                    cp.CompressFiles(fs, outputFiles);
                }

                resultCount = outputFiles.Count();
                return true;
            }
            catch (Exception err)
            {
                ExceptionHelper.Manage("ZipHelper:CompressFolder", err);
                resultCount = 0;
                return false;
            }
            finally
            {
                cp = null;
            }
        }

        public bool UncompressToFolder(string inputFile, string outputFolder, out int resultCount)
        {
            SevenZipExtractor temp = null;
            try
            {
                temp = GetExtractor(inputFile);

                DirectoryHelper.Check(outputFolder);

                temp.PreserveDirectoryStructure = false;
                temp.ExtractArchive(outputFolder);
 
                resultCount = temp.ArchiveFileData.Count;

                return true;
            }
            catch (Exception err)
            {
                ExceptionHelper.Manage("ZipHelper:UncompressToFolder", err);
                resultCount = 0;
                return false;
            }
            finally
            {
                ReleaseExtractor(temp);
            }
        }
        #endregion
    }
}