OF-DL/Cajetan.OF-DL/Services/CajetanLoggingService.cs

using Serilog.Core;
using Serilog.Events;

namespace OF_DL.Services;

public class CajetanLoggingService : ILoggingService
{
    public CajetanLoggingService()
    {
        LevelSwitch = new LoggingLevelSwitch();
        InitializeLoggerWithSeq();
    }

    /// <summary>
    /// Gets the level switch that controls runtime logging verbosity.
    /// </summary>
    public LoggingLevelSwitch LevelSwitch { get; }

    /// <summary>
    /// Updates the minimum logging level at runtime.
    /// </summary>
    /// <param name="newLevel">The new minimum log level.</param>
    public void UpdateLoggingLevel(LoggingLevel newLevel)
    {
        LevelSwitch.MinimumLevel = (LogEventLevel)newLevel;
        Log.Debug("Logging level updated to: {LoggingLevel}", newLevel);
    }

    /// <summary>
    /// Returns the current minimum logging level.
    /// </summary>
    public LoggingLevel GetCurrentLoggingLevel() => (LoggingLevel)LevelSwitch.MinimumLevel;

    private void InitializeLoggerWithSeq()
    {
        LevelSwitch.MinimumLevel = LogEventLevel.Warning;

        LoggerConfiguration loggerConfig = new LoggerConfiguration()
            .Enrich.FromLogContext()
            .Enrich.WithProperty("Application", "OF_DL")
            .Enrich.WithProperty("StartTime", $"{DateTime.Now:yyyy-MM-dd HH:mm:ss} ")
            .Enrich.WithProperty("MachineName", Environment.MachineName)
            .MinimumLevel.Verbose()
            .WriteTo.File("logs/OFDL.txt", rollingInterval: RollingInterval.Day, restrictedToMinimumLevel: LogEventLevel.Error, levelSwitch: LevelSwitch)
            .WriteTo.Seq("https://seq.cajetan.dk", controlLevelSwitch: LevelSwitch);

        if (System.Diagnostics.Debugger.IsAttached)
            loggerConfig.WriteTo.Debug(restrictedToMinimumLevel: LogEventLevel.Debug);

        Log.Logger = loggerConfig.CreateLogger();

        Log.Debug("Logging service initialized");
    }
}