FileLogger.cs

using Meadow;
using Meadow.Logging;
using System;
using System.IO;
using System.Linq;

namespace Logging;

public class FileLogger : ILogProvider
{
    private string LogFilePath { get; }

    public FileLogger()
    {
        LogFilePath = Path.Combine(MeadowOS.FileSystem.DocumentsDirectory, "meadow.log");
        if (!File.Exists(LogFilePath))
        {
            File.Create(LogFilePath).Close();
        }
    }

    public void Log(LogLevel level, string message, string messageGroup)
    {
        switch (level)
        {
            case LogLevel.Warning:
            case LogLevel.Error:
                LogToFile(message);
                break;
        }
    }

    private void LogToFile(string message)
    {
        if (message.EndsWith(Environment.NewLine))
        {
            File.AppendAllText(LogFilePath, message);
        }
        else
        {
            File.AppendAllText(LogFilePath, message + Environment.NewLine);
        }
    }

    public string[] GetLogContents()
    {
        if (!File.Exists(LogFilePath))
        {
            return new string[0];
        }
        return File.ReadLines(LogFilePath).ToArray();
    }

    public void TruncateLog()
    {
        File.Create(LogFilePath).Close();
    }
}