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using System;
using System.Text;
using StardewModdingAPI.Web.Framework.LogParsing.Models;
namespace StardewModdingAPI.Web.Framework.LogParsing
{
/// <summary>Handles constructing log message instances with minimal memory allocation.</summary>
internal class LogMessageBuilder
{
/*********
** Fields
*********/
/// <summary>The local time when the next log was posted.</summary>
public string Time { get; set; }
/// <summary>The log level for the next log message.</summary>
public LogLevel Level { get; set; }
/// <summary>The screen ID in split-screen mode.</summary>
public int ScreenId { get; set; }
/// <summary>The mod name for the next log message.</summary>
public string Mod { get; set; }
/// <summary>The text for the next log message.</summary>
private readonly StringBuilder Text = new();
/*********
** Accessors
*********/
/// <summary>Whether the next log message has been started.</summary>
public bool Started { get; private set; }
/*********
** Public methods
*********/
/// <summary>Start accumulating values for a new log message.</summary>
/// <param name="time">The local time when the log was posted.</param>
/// <param name="level">The log level.</param>
/// <param name="screenId">The screen ID in split-screen mode.</param>
/// <param name="mod">The mod name.</param>
/// <param name="text">The initial log text.</param>
/// <exception cref="InvalidOperationException">A log message is already started; call <see cref="Clear"/> before starting a new message.</exception>
public void Start(string time, LogLevel level, int screenId, string mod, string text)
{
if (this.Started)
throw new InvalidOperationException("Can't start new message, previous log message isn't done yet.");
this.Started = true;
this.Time = time;
this.Level = level;
this.ScreenId = screenId;
this.Mod = mod;
this.Text.Append(text);
}
/// <summary>Add a new line to the next log message being built.</summary>
/// <param name="text">The line to add.</param>
/// <exception cref="InvalidOperationException">A log message hasn't been started yet.</exception>
public void AddLine(string text)
{
if (!this.Started)
throw new InvalidOperationException("Can't add text, no log message started yet.");
this.Text.Append("\n");
this.Text.Append(text);
}
/// <summary>Get a log message for the accumulated values.</summary>
public LogMessage Build()
{
if (!this.Started)
return null;
return new LogMessage
{
Time = this.Time,
Level = this.Level,
ScreenId = this.ScreenId,
Mod = this.Mod,
Text = this.Text.ToString()
};
}
/// <summary>Reset to start a new log message.</summary>
public void Clear()
{
this.Started = false;
this.Text.Clear();
}
}
}
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