squad-rain-ops-mini/Helpers/SquadGameLog/RealtimeFileReader.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System;
using System.IO;
using System.Timers;

namespace RainOpsMini.Helpers
{

    public class RealtimeFileReader
    {
        private readonly string _filePath;
        private long _lastPosition = 0;
        private readonly System.Timers.Timer _timer;

        public event Action<string> OnNewLine;

        public RealtimeFileReader(string filePath, double intervalMs = 100)
        {
            _filePath = filePath;

            _timer = new System.Timers.Timer(intervalMs);
            _timer.Elapsed += Timer_Elapsed;
            _timer.AutoReset = true;
        }

        public void Start() => _timer.Start();
        public void Stop() => _timer.Stop();

        private void Timer_Elapsed(object? sender, ElapsedEventArgs e)
        {
            try
            {
                using (var fs = new FileStream(_filePath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
                {
                    if (_lastPosition > fs.Length)
                        _lastPosition = 0; // 文件被截断或重写了

                    fs.Seek(_lastPosition, SeekOrigin.Begin);
                    using (var reader = new StreamReader(fs))
                    {
                        string? line;
                        while ((line = reader.ReadLine()) != null)
                        {
                            OnNewLine?.Invoke(line); // 触发回调
                        }

                        _lastPosition = fs.Position;
                    }
                }
            }
            catch (IOException)
            {
                // 可选：忽略文件正被写入的异常
            }
        }
    }
}