TransformStream

.gitignore

@@ -18,6 +18,7 @@ nuget/
 .idea/
 .editorconfig
 *.user
+*.DotSettings
 
 #backups
 .old*/

DTLib.Logging.Microsoft/DTLib.Logging.Microsoft.csproj

@@ -2,7 +2,7 @@
     <PropertyGroup>
         <!--package info-->
         <PackageId>DTLib.Logging.Microsoft</PackageId>
-        <Version>1.1.0</Version>
+        <Version>1.1.1</Version>
         <Authors>Timerix</Authors>
         <Description>DTLib logger wrapper with dependency injection</Description>
         <RepositoryType>GIT</RepositoryType>
@@ -28,6 +28,6 @@
         <ProjectReference Include="..\DTLib\DTLib.csproj" />
     </ItemGroup>
     <ItemGroup Condition=" '$(Configuration)' != 'Debug' ">
-        <PackageReference Include="DTLib" Version="1.4.*" />
+        <PackageReference Include="DTLib" Version="1.6.*" />
     </ItemGroup>
 </Project>

DTLib/DTLib.csproj

@@ -2,7 +2,7 @@
 	<PropertyGroup>
 		<!--package info-->
 		<PackageId>DTLib</PackageId>
-		<Version>1.6.0</Version>
+		<Version>1.6.1</Version>
 		<Authors>Timerix</Authors>
 		<Description>Library for all my C# projects</Description>
 		<RepositoryType>GIT</RepositoryType>

DTLib/DTLib.csproj.DotSettings

@@ -1,3 +0,0 @@
-<wpf:ResourceDictionary xml:space="preserve" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:s="clr-namespace:System;assembly=mscorlib" xmlns:ss="urn:shemas-jetbrains-com:settings-storage-xaml" xmlns:wpf="http://schemas.microsoft.com/winfx/2006/xaml/presentation">
-	<s:Boolean x:Key="/Default/CodeInspection/NamespaceProvider/NamespaceFoldersToSkip/=console/@EntryIndexedValue">False</s:Boolean>
-	<s:Boolean x:Key="/Default/CodeInspection/NamespaceProvider/NamespaceFoldersToSkip/=logging_005Cloggers/@EntryIndexedValue">True</s:Boolean></wpf:ResourceDictionary>

DTLib/TransformStream.cs

@@ -0,0 +1,69 @@
+using System.IO;
+using File = System.IO.File;
+
+namespace DTLib;
+
+/// <summary>
+/// Stream wrapper for some operations over data chunks.
+/// You can add multiple transform operations.
+/// <example><code>
+/// using var pipe = new TransformStream(File.OpenRead("encrypted"))
+///     .AddTransform(ReportProgress)
+///     .AddTransform(Decrypt);
+/// using var o = File.OpenWrite("decrypted");
+/// pipe.CopyTo(o);
+/// </code></example>
+/// </summary>
+public class TransformStream : Stream
+{
+    private readonly Stream _inputStream;
+    
+    public delegate void TransformFuncDelegate(byte[] buffer, int offset, int count);
+    private List<TransformFuncDelegate> _transformFunctions = new();
+
+    public TransformStream(Stream inputStream)
+    {
+        _inputStream = inputStream;
+    }
+
+    public TransformStream AddTransform(TransformFuncDelegate f)
+    {
+        _transformFunctions.Add(f);
+        return this;
+    }
+    
+    public TransformStream AddTransforms(IEnumerable<TransformFuncDelegate> f)
+    {
+        _transformFunctions.AddRange(f);
+        return this;
+    }
+    
+    public override bool CanRead => _inputStream.CanRead;
+    public override bool CanSeek => _inputStream.CanSeek;
+    public override bool CanWrite => false;
+    public override long Length => _inputStream.Length;
+    public override long Position { get => _inputStream.Position; set => _inputStream.Position = value; }
+    
+    public override int Read(byte[] buffer, int offset, int count)
+    {
+        int read = _inputStream.Read(buffer, offset, count);
+        if(read > 0)
+        {
+            for (int i = 0; i < _transformFunctions.Count; i++)
+            {
+                _transformFunctions[i].Invoke(buffer, offset, read);
+            }
+        }
+        return read;
+    }
+    
+    public override void Flush() {}
+
+    public override long Seek(long offset, SeekOrigin origin) => _inputStream.Seek(offset, origin);
+
+    public override void SetLength(long value) => throw new NotImplementedException();
+
+    public override void Write(byte[] buffer, int offset, int count) => throw new NotImplementedException();
+
+    public override void Close() => _inputStream.Close();
+}