Add initial version with documentation comments.

Author: CodingFlow

SimpleChain.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.9.34902.65
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SimpleChain", "SimpleChain\SimpleChain.csproj", "{0F65EDD3-359B-41D0-B412-5BC4B130AA2A}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{0F65EDD3-359B-41D0-B412-5BC4B130AA2A}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{0F65EDD3-359B-41D0-B412-5BC4B130AA2A}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{0F65EDD3-359B-41D0-B412-5BC4B130AA2A}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{0F65EDD3-359B-41D0-B412-5BC4B130AA2A}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {7BFEA764-EEFF-431E-AC16-18A782EDEC9E}
+	EndGlobalSection
+EndGlobal

SimpleChain/Controller.cs

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+namespace SimpleChain;
+
+/// <inheritdoc cref="IController{TInput, TOutput}" />
+/// <typeparam name="TProcessor">Interface for processors to be used. Recommended to be derived from <see cref="IProcessor{T}"/>.</typeparam>
+public class Controller<TProcessor, TInput, TOutput> : IController<TInput, TOutput> where TProcessor : IProcessor<TInput, TOutput>
+{
+    private readonly IEnumerable<TProcessor> processors;
+
+    public Controller(IEnumerable<TProcessor> processors) {
+        this.processors = processors;
+    }
+
+    public TOutput Run(TInput input) {
+        return processors
+            .First(p => p.Condition(input))
+            .Process(input);
+    }
+}

SimpleChain/IController.cs

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+namespace SimpleChain;
+
+/// <summary>
+/// Orchestrator of the chain of responsibility.
+/// </summary>
+/// <typeparam name="TInput">Object containing inputs to processors.</typeparam>
+public interface IController<TInput, TOutput>
+{
+    /// <summary>
+    /// Execute the chain of processors with given input. The input is passed to each processor's 
+    /// <see cref="IProcessor{TInput, TOutput}.Condition(TInput)">Condition</see> and
+    /// <see cref="IProcessor{TInput, TOutput}.Process(TInput)">Process</see> methods.
+    /// </summary>
+    /// <param name="input">Input passed to processors.</param>
+    /// <returns>Output of processor able to handle input.</returns>
+    TOutput Run(TInput input);
+}

SimpleChain/IProcessor.cs

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+namespace SimpleChain;
+
+/// <summary>
+/// Base processor interface used by the library. All processors must implement this interface.
+/// It is recommended to create your own interfaces derived from this interface instead of using
+/// this interface directly.
+/// </summary>
+/// <typeparam name="TInput">Input passed to both <see cref="Condition(TInput)">Condition</see> and <see cref="Process(TInput)">Process</see>.</typeparam>
+/// <typeparam name="TOutput">Processor output.</typeparam>
+public interface IProcessor<TInput, TOutput>
+{
+    /// <summary>
+    /// Condition that determines whether processor should execute.
+    /// </summary>
+    /// <param name="input">Input used by the condition to determine if processor should execute.</param>
+    /// <returns>Boolean indicating if condition should execute.</returns>
+    public bool Condition(TInput input);
+
+    /// <summary>
+    /// Executes the processor.
+    /// </summary>
+    /// <param name="input">Input used by the processor to create its output.</param>
+    /// <returns>Processor output.</returns>
+    public TOutput Process(TInput input);
+}

SimpleChain/SimpleChain.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>