CredentialProvider.Microsoft/Logging/ConsoleLoggers.cs

// Copyright (c) Microsoft. All rights reserved.
//
// Licensed under the MIT license.

using System;
using System.IO;
using NuGet.Common;

namespace NuGetCredentialProvider.Logging
{
    /// <summary>
    /// Logs messages to standard output, with log level included
    /// </summary>
    public class StandardOutputLogger : HumanFriendlyTextWriterLogger
    {
        public StandardOutputLogger() : base(Console.Out, writesToConsole: true) { }
    }

    /// <summary>
    /// Logs messages to standard error, with log level included
    /// </summary>
    public class StandardErrorLogger : HumanFriendlyTextWriterLogger
    {
        public StandardErrorLogger() : base(Console.Error, writesToConsole: true) { }
    }

    /// <summary>
    /// Emits a log message in a human-readable format to a TextWriter, including the log level
    /// </summary>
    public class HumanFriendlyTextWriterLogger : LoggerBase
    {
        private readonly TextWriter writer;

        public HumanFriendlyTextWriterLogger(TextWriter writer, bool writesToConsole)
            : base(writesToConsole)
        {
            this.writer = writer;
        }

        protected override void WriteLog(LogLevel logLevel, string message)
        {
            writer.WriteLine($"[{logLevel}] {message}");
        }
    }
}