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using System;
using System.Collections.Generic;
using System.Linq;
namespace StardewModdingAPI.Framework
{
/// <summary>Encapsulates monitoring and logic for a given module.</summary>
internal class Monitor : IMonitor
{
/*********
** Properties
*********/
/// <summary>The name of the module which logs messages using this instance.</summary>
private readonly string Source;
/// <summary>The log file to which to write messages.</summary>
private readonly LogFileManager LogFile;
/// <summary>The maximum length of the <see cref="LogLevel"/> values.</summary>
private static readonly int MaxLevelLength = (from level in Enumerable.Cast<LogLevel>(Enum.GetValues(typeof(LogLevel))) select level.ToString().Length).Max();
/// <summary>The console text color for each log level.</summary>
private static readonly Dictionary<LogLevel, ConsoleColor> Colors = new Dictionary<LogLevel, ConsoleColor>
{
[LogLevel.Trace] = ConsoleColor.DarkGray,
[LogLevel.Debug] = ConsoleColor.DarkGray,
[LogLevel.Info] = ConsoleColor.White,
[LogLevel.Warn] = ConsoleColor.Yellow,
[LogLevel.Error] = ConsoleColor.Red,
[LogLevel.Alert] = ConsoleColor.Magenta
};
/*********
** Accessors
*********/
/// <summary>Whether the current console supports color codes.</summary>
internal static readonly bool ConsoleSupportsColor = Monitor.GetConsoleSupportsColor();
/// <summary>Whether to show trace messages in the console.</summary>
internal bool ShowTraceInConsole { get; set; }
/// <summary>Whether to write anything to the console. This should be disabled if no console is available.</summary>
internal bool WriteToConsole { get; set; } = true;
/*********
** Public methods
*********/
/// <summary>Construct an instance.</summary>
/// <param name="source">The name of the module which logs messages using this instance.</param>
/// <param name="logFile">The log file to which to write messages.</param>
public Monitor(string source, LogFileManager logFile)
{
// validate
if (string.IsNullOrWhiteSpace(source))
throw new ArgumentException("The log source cannot be empty.");
if (logFile == null)
throw new ArgumentNullException(nameof(logFile), "The log file manager cannot be null.");
// initialise
this.Source = source;
this.LogFile = logFile;
}
/// <summary>Log a message for the player or developer.</summary>
/// <param name="message">The message to log.</param>
/// <param name="level">The log severity level.</param>
public void Log(string message, LogLevel level = LogLevel.Debug)
{
this.LogImpl(this.Source, message, Monitor.Colors[level], level);
}
/// <summary>Immediately exit the game without saving. This should only be invoked when an irrecoverable fatal error happens that risks save corruption or game-breaking bugs.</summary>
/// <param name="reason">The reason for the shutdown.</param>
public void ExitGameImmediately(string reason)
{
Program.ExitGameImmediately(this.Source, reason);
Program.gamePtr.Exit();
}
/// <summary>Log a fatal error message.</summary>
/// <param name="message">The message to log.</param>
internal void LogFatal(string message)
{
Console.BackgroundColor = ConsoleColor.Red;
this.LogImpl(this.Source, message, ConsoleColor.White, LogLevel.Error);
}
/// <summary>Log a message for the player or developer, using the specified console color.</summary>
/// <param name="source">The name of the mod logging the message.</param>
/// <param name="message">The message to log.</param>
/// <param name="color">The console color.</param>
/// <param name="level">The log level.</param>
[Obsolete("This method is provided for backwards compatibility and otherwise should not be used. Use " + nameof(Monitor) + "." + nameof(Monitor.Log) + " instead.")]
internal void LegacyLog(string source, string message, ConsoleColor color, LogLevel level = LogLevel.Debug)
{
this.LogImpl(source, message, color, level);
}
/*********
** Private methods
*********/
/// <summary>Write a message line to the log.</summary>
/// <param name="source">The name of the mod logging the message.</param>
/// <param name="message">The message to log.</param>
/// <param name="color">The console color.</param>
/// <param name="level">The log level.</param>
private void LogImpl(string source, string message, ConsoleColor color, LogLevel level)
{
// generate message
string levelStr = level.ToString().ToUpper().PadRight(Monitor.MaxLevelLength);
message = $"[{DateTime.Now:HH:mm:ss} {levelStr} {source}] {message}";
// log
if (this.WriteToConsole && (this.ShowTraceInConsole || level != LogLevel.Trace))
{
if (Monitor.ConsoleSupportsColor)
{
Console.ForegroundColor = color;
Console.WriteLine(message);
Console.ResetColor();
}
else
Console.WriteLine(message);
}
this.LogFile.WriteLine(message);
}
/// <summary>Test whether the current console supports color formatting.</summary>
private static bool GetConsoleSupportsColor()
{
try
{
Console.ResetColor();
return true;
}
catch (Exception)
{
return false;
}
}
}
}
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