IW4M-Admin/Application/IO/GameLogReader.cs

86 lines
2.7 KiB
C#
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using SharedLibraryCore;
using SharedLibraryCore.Interfaces;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Microsoft.Extensions.Logging;
using ILogger = Microsoft.Extensions.Logging.ILogger;
namespace IW4MAdmin.Application.IO
{
class GameLogReader : IGameLogReader
{
private readonly IEventParser _parser;
private readonly string _logFile;
private readonly ILogger _logger;
public long Length => new FileInfo(_logFile).Length;
public int UpdateInterval => 300;
public GameLogReader(string logFile, IEventParser parser, ILogger<GameLogReader> logger)
{
_logFile = logFile;
_parser = parser;
_logger = logger;
}
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public async Task<IEnumerable<GameEvent>> ReadEventsFromLog(long fileSizeDiff, long startPosition, Server server = null)
{
// allocate the bytes for the new log lines
List<string> logLines = new List<string>();
// open the file as a stream
using (FileStream fs = new FileStream(_logFile, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
{
byte[] buff = new byte[fileSizeDiff];
fs.Seek(startPosition, SeekOrigin.Begin);
await fs.ReadAsync(buff, 0, (int)fileSizeDiff);
var stringBuilder = new StringBuilder();
char[] charBuff = Utilities.EncodingType.GetChars(buff);
foreach (char c in charBuff)
{
if (c == '\n')
{
logLines.Add(stringBuilder.ToString());
stringBuilder = new StringBuilder();
}
else if (c != '\r')
{
stringBuilder.Append(c);
}
}
if (stringBuilder.Length > 0)
{
logLines.Add(stringBuilder.ToString());
}
}
List<GameEvent> events = new List<GameEvent>();
// parse each line
foreach (string eventLine in logLines.Where(_line => _line.Length > 0))
{
try
{
var gameEvent = _parser.GenerateGameEvent(eventLine);
events.Add(gameEvent);
}
catch (Exception e)
{
_logger.LogError(e, "Could not properly parse event line {@eventLine}", eventLine);
}
}
return events;
}
}
}