130 lines
3.7 KiB
C#
130 lines
3.7 KiB
C#
using Newtonsoft.Json;
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.IO.Compression;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace Pilz.IO
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{
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public class EmbeddedFilesContainer
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{
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[JsonProperty("CompressedFiles")]
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private readonly Dictionary<string, byte[]> compressedFiles = new Dictionary<string, byte[]>();
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[JsonIgnore]
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public IEnumerable<string> AllFileNames
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{
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get => compressedFiles.Keys;
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}
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public Task<bool> AddFileAsync(string fileName, string filePath)
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{
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return Task.Run(() => AddFile(fileName, filePath));
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}
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public bool AddFile(string fileName, string filePath)
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{
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bool success;
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FileStream fs = null;
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MemoryStream compressed = null;
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#if !DEBUG
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try
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{
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#endif
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fs = new FileStream(filePath, FileMode.Open, FileAccess.Read);
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compressed = new MemoryStream();
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using (var compressor = new DeflateStream(compressed, CompressionLevel.Optimal, true))
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fs.CopyTo(compressor);
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success = true;
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#if !DEBUG
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}
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catch (Exception)
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{
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success = false;
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}
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#endif
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if (success)
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{
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var compressedBytes = compressed.ToArray();
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if (compressedFiles.ContainsKey(fileName))
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compressedFiles[fileName] = compressedBytes;
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else
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compressedFiles.Add(fileName, compressedBytes);
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}
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compressed?.Close();
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fs?.Close();
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return success;
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}
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public void RemoveFile(string fileName)
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{
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if (compressedFiles.ContainsKey(fileName))
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compressedFiles.Remove(fileName);
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}
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public bool HasFile(string fileName)
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{
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return compressedFiles.ContainsKey(fileName);
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}
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public Task<Stream> GetStreamAsync(string fileName)
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{
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return Task.Run(() => GetStream(fileName));
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}
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public Stream GetStream(string fileName)
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{
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Stream decompressed = null;
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if (compressedFiles.ContainsKey(fileName))
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{
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decompressed = new MemoryStream();
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DecompressToStream(decompressed, compressedFiles[fileName]);
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}
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return decompressed;
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}
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public Task<string> GetLocalFilePathAsync(string fileName)
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{
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return Task.Run(() => GetLocalFilePath(fileName));
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}
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public string GetLocalFilePath(string fileName)
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{
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string filePath = string.Empty;
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if (compressedFiles.ContainsKey(fileName))
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{
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filePath = Path.GetTempFileName();
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if (Path.HasExtension(fileName))
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filePath = Path.ChangeExtension(filePath, Path.GetExtension(fileName));
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var decompressed = new FileStream(filePath, FileMode.Create, FileAccess.ReadWrite);
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DecompressToStream(decompressed, compressedFiles[fileName]);
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decompressed.Flush();
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decompressed.Close();
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}
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return filePath;
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}
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private void DecompressToStream(Stream decompressed, byte[] compressedData)
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{
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var compressed = new MemoryStream(compressedData);
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var decompressor = new DeflateStream(compressed, CompressionMode.Decompress, true);
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decompressor.CopyTo(decompressed);
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decompressor.Close();
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compressed.Close();
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}
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}
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}
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