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using System;
using System.Collections.Concurrent;
using System.IO;
using System.Linq;
namespace StardewModdingAPI
{
/// <summary>A log writer which queues messages for output, and periodically flushes them to the console and log file.</summary>
/// <remarks>Only one instance should be created.</remarks>
[Obsolete("This class is internal and should not be referenced outside SMAPI. It will no longer be exposed in a future version.")]
public class LogWriter
{
/*********
** Properties
*********/
/// <summary>The queued messages to flush.</summary>
private readonly ConcurrentQueue<LogInfo> Queue;
/// <summary>The underlying file stream.</summary>
private readonly StreamWriter FileStream;
/*********
** Public methods
*********/
/// <summary>Construct an instance.</summary>
/// <param name="path">The log path to write.</param>
public LogWriter(string path)
{
// create log directory (required for stream writer)
Directory.CreateDirectory(Path.GetDirectoryName(path));
// initialise
this.Queue = new ConcurrentQueue<LogInfo>();
this.FileStream = new StreamWriter(Constants.LogPath, false);
}
/// <summary>Queue a message for output.</summary>
/// <param name="message">The message to log.</param>
public void WriteToLog(string message)
{
lock (this.Queue)
{
var logEntry = new LogInfo(message);
this.Queue.Enqueue(logEntry);
if (this.Queue.Any())
this.FlushLog();
}
}
/// <summary>Queue a message for output.</summary>
/// <param name="message">The message to log.</param>
public void WriteToLog(LogInfo message)
{
lock (this.Queue)
{
this.Queue.Enqueue(message);
if (this.Queue.Any())
this.FlushLog();
}
}
/*********
** Private methods
*********/
/// <summary>Flush the underlying queue to the console and file.</summary>
private void FlushLog()
{
lock (this.FileStream)
{
LogInfo entry;
while (this.Queue.TryDequeue(out entry))
{
string message = $"[{entry.LogTime}] {entry.Message}";
if (entry.PrintConsole)
{
Console.ForegroundColor = entry.Colour;
Console.WriteLine(message);
Console.ForegroundColor = ConsoleColor.Gray;
}
this.FileStream.WriteLine(message);
}
this.FileStream.Flush();
}
}
}
}
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