Complete first version of a basic logger.

.config/dotnet-tools.json

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+{
+  "version": 1,
+  "isRoot": true,
+  "tools": {}
+}

SmplLogger.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 16
+VisualStudioVersion = 16.0.30114.105
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "src", "src", "{82ED88E6-BE10-406F-92E6-EB0348817FD3}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SilentDevNull.SmplLogger", "src\SilentDevNull.SmplLogger\SilentDevNull.SmplLogger.csproj", "{B399EA71-364D-43CD-A684-297ACE024767}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SmplLoggerConsoleTest", "src\SmplLoggerConsoleTest\SmplLoggerConsoleTest.csproj", "{3C78C3E6-8D1F-4AFB-B1FB-85F937B28B42}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{B399EA71-364D-43CD-A684-297ACE024767}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{B399EA71-364D-43CD-A684-297ACE024767}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{B399EA71-364D-43CD-A684-297ACE024767}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{B399EA71-364D-43CD-A684-297ACE024767}.Release|Any CPU.Build.0 = Release|Any CPU
+		{3C78C3E6-8D1F-4AFB-B1FB-85F937B28B42}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{3C78C3E6-8D1F-4AFB-B1FB-85F937B28B42}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{3C78C3E6-8D1F-4AFB-B1FB-85F937B28B42}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{3C78C3E6-8D1F-4AFB-B1FB-85F937B28B42}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(NestedProjects) = preSolution
+		{B399EA71-364D-43CD-A684-297ACE024767} = {82ED88E6-BE10-406F-92E6-EB0348817FD3}
+		{3C78C3E6-8D1F-4AFB-B1FB-85F937B28B42} = {82ED88E6-BE10-406F-92E6-EB0348817FD3}
+	EndGlobalSection
+EndGlobal

global.json

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+{
+  "sdk": {
+    "version": "6.0.101"
+  }
+}

src/SilentDevNull.SmplLogger/GlobalUsings.cs

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+global using System;
+global using System.Collections.Concurrent;
+global using System.Collections.Generic;
+global using System.IO;
+global using System.Text;
+global using System.Text.Json;
+
+global using Microsoft.Extensions.DependencyInjection;
+global using Microsoft.Extensions.DependencyInjection.Extensions;
+global using Microsoft.Extensions.Logging;
+global using Microsoft.Extensions.Logging.Configuration;
+

src/SilentDevNull.SmplLogger/LogFileWriter.cs

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+namespace SilentDevNull.SmplLogger;
+public class LogFileWriter
+{
+    public LogFileWriter()
+    {
+    }
+
+    public void Log(String logMsg)
+    {
+        Console.WriteLine($"Log message: \n\t {logMsg}");
+        string fileName = string.Format($"log-{DateTime.Now:yyyy-MM-dd}.log");
+
+        //using (StreamWriter wr = new StreamWriter(LogName, true))
+        using StreamWriter wr = new StreamWriter(fileName, true);
+        wr.WriteLine(logMsg);
+        wr.Close();
+    }
+}

src/SilentDevNull.SmplLogger/SilentDevNull.SmplLogger.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <FileVersion>1.0.0</FileVersion>
+    <Version>1.0.0</Version>
+    <PublishSingleFile>true</PublishSingleFile>
+    <SelfContained>true</SelfContained>
+    <PublishReadyToRun>true</PublishReadyToRun>
+    <Authors>SilentDevNull</Authors>
+    <Company> </Company>
+    <Description>Basic logger to create log file. This is using ILogger</Description>
+    <RepositoryUrl>https://github.com/silentdevnull/SmplLogger</RepositoryUrl>
+    <PackageProjectUrl>https://github.com/silentdevnull/SmplLogger</PackageProjectUrl>
+    <PackageTags>Logger</PackageTags>
+    <PackageLicenseExpression>MIT</PackageLicenseExpression>
+  </PropertyGroup>
+  <ItemGroup>
+    <PackageReference Include="Microsoft.Extensions.Logging" Version="6.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Logging.Configuration" Version="6.0.0" />
+  </ItemGroup>
+</Project>

src/SilentDevNull.SmplLogger/SmplLogger.cs

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+namespace SilentDevNull.SmplLogger;
+/// <summary>
+/// 
+/// </summary>
+public class SmplLogger : ILogger
+{
+    private readonly string _name = String.Empty;
+    /// <summary>
+    /// 
+    /// </summary>
+    public SmplLogger()
+    {
+    }
+
+    /// <summary>
+    /// 
+    /// </summary>
+    /// <param name="name"></param>
+    public SmplLogger(string name)
+    {
+        _name = name;
+    }
+
+    /// <summary>
+    /// 
+    /// </summary>
+    /// <param name="state"></param>
+    /// <typeparam name="TState"></typeparam>
+    /// <returns></returns>
+    public IDisposable BeginScope<TState>(TState state) => default!;
+
+    /// <summary>
+    /// 
+    /// </summary>
+    /// <param name="logLevel"></param>
+    /// <returns></returns>
+    public bool IsEnabled(LogLevel logLevel) => true;
+
+    /// <summary>
+    /// 
+    /// </summary>
+    /// <param name="logLevel"></param>
+    /// <param name="eventId"></param>
+    /// <param name="state"></param>
+    /// <param name="exception"></param>
+    /// <param name="formatter"></param>
+    /// <typeparam name="TState"></typeparam>
+    public void Log<TState>(
+        LogLevel logLevel,
+        EventId eventId,
+        TState state,
+        Exception? exception,
+        Func<TState, Exception, string> formatter)
+    {
+        #if(DEBUG)
+        Console.WriteLine(_name);
+        Console.WriteLine($"LogLevel: {logLevel} EventId: {eventId} State: {state} exception: {exception}");
+        #endif
+        var log = string.Format($"{logLevel}\t{eventId}\t{state}\t{exception}");
+        Console.WriteLine(log);
+        LogFileWriter logFileWriter = new LogFileWriter();
+        logFileWriter.Log(log);
+        //logFileWriter.Log(logLevel,eventId,state,exception);
+    }
+}

src/SilentDevNull.SmplLogger/SmplLoggerExtensions.cs

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+namespace SilentDevNull.SmplLogger;
+
+public static class SmplLoggerExtensions
+{
+    public static ILoggingBuilder AddSmplLogger(this ILoggingBuilder builder)
+    {
+        builder.Services.TryAddEnumerable(ServiceDescriptor.Singleton<ILoggerProvider,SmplLoggerProvider>());
+        return builder;
+    }
+}

src/SilentDevNull.SmplLogger/SmplLoggerProvider.cs

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+namespace SilentDevNull.SmplLogger;
+
+public class SmplLoggerProvider : ILoggerProvider
+{
+    private readonly ConcurrentDictionary<string, SmplLogger> _loggers = new();
+
+    public SmplLoggerProvider()
+    {
+    }
+
+    public SmplLoggerProvider(EventHandler onCreateLogger)
+    {
+        OnCreateLogger = onCreateLogger;
+    }
+    public event EventHandler OnCreateLogger = delegate { };
+
+    public ILogger CreateLogger(string categoryName) =>
+        _loggers.GetOrAdd(categoryName, name => new SmplLogger(name));
+
+    public void Dispose()
+    {
+        _loggers.Clear();
+    }
+}

src/SmplLoggerConsoleTest/Program.cs

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+using SilentDevNull.SmplLogger;
+using Microsoft.Extensions.Logging;
+
+using ILoggerFactory loggerFactory =
+    LoggerFactory.Create(builder =>
+        builder.AddSmplLogger());
+ILogger<Program> logger = loggerFactory.CreateLogger<Program>();
+
+logger.LogInformation("Test");
+logger.LogDebug("test debug");
+logger.LogError("Error");
+logger.LogInformation("Test1");

src/SmplLoggerConsoleTest/SmplLoggerConsoleTest.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <ItemGroup>
+    <ProjectReference Include="..\SilentDevNull.SmplLogger\SilentDevNull.SmplLogger.csproj" />
+  </ItemGroup>
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+    <ItemGroup>
+        <PackageReference Include="Microsoft.Extensions.Logging" Version="6.0.0" />
+        <PackageReference Include="Microsoft.Extensions.Logging.Configuration" Version="6.0.0" />
+    </ItemGroup>
+</Project>