eqemu-server/common/eqemu_logsys.h

/*	EQEMu: Everquest Server Emulator
	Copyright (C) 2001-2015 EQEMu Development Team (http://eqemulator.net)

	This program is free software; you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation; version 2 of the License.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY except by those people which sell it, which
	are required to give you total support for your newly bought product;
	without even the implied warranty of MERCHANTABILITY or FITNESS FOR
	A PARTICULAR PURPOSE. See the GNU General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with this program; if not, write to the Free Software
	Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/

#ifndef EQEMU_LOGSYS_H
#define EQEMU_LOGSYS_H

#include <fmt/format.h>
#include <iostream>
#include <fstream>
#include <stdio.h>
#include <functional>
#include "types.h"

namespace Logs {
	enum DebugLevel {
		General = 1,	/* 1 - Low-Level general debugging, useful info on single line */
		Moderate,		/* 2 - Informational based, used in functions, when particular things load */
		Detail			/* 3 - Use this for extreme detail in logging, usually in extreme debugging in the stack or interprocess communication */
	};

	/*
		If you add to this, make sure you update LogCategoryName
		NOTE: Only add to the bottom of the enum because that is the type ID assignment
	*/

enum LogCategory {
	None = 0,
	AA,
	AI,
	Aggro,
	Attack,
	Client_Server_Packet,
	Combat,
	Commands,
	Crash,
	Debug,
	Doors,
	Error,
	Guilds,
	Inventory,
	Launcher,
	Netcode,
	Normal,
	Object,
	Pathing,
	QS_Server,
	Quests,
	Rules,
	Skills,
	Spawns,
	Spells,
	Status,
	TCP_Connection,
	Tasks,
	Tradeskills,
	Trading,
	Tribute,
	UCS_Server,
	WebInterface_Server,
	World_Server,
	Zone_Server,
	MySQLError,
	MySQLQuery,
	Mercenaries,
	QuestDebug,
	Server_Client_Packet,
	Client_Server_Packet_Unhandled,
	Server_Client_Packet_With_Dump,
	Client_Server_Packet_With_Dump,
	Login_Server,
	Client_Login,
	Headless_Client,
	HP_Update,
	FixZ,
	Food,
	Traps,
	MaxCategoryID	/* Don't Remove this*/
};

/* If you add to this, make sure you update LogCategory */
static const char* LogCategoryName[LogCategory::MaxCategoryID] = {
	"",
	"AA",
	"AI",
	"Aggro",
	"Attack",
	"Packet :: Client -> Server",
	"Combat",
	"Commands",
	"Crash",
	"Debug",
	"Doors",
	"Error",
	"Guilds",
	"Inventory",
	"Launcher",
	"Netcode",
	"Normal",
	"Object",
	"Pathing",
	"QS Server",
	"Quests",
	"Rules",
	"Skills",
	"Spawns",
	"Spells",
	"Status",
	"TCP Connection",
	"Tasks",
	"Tradeskills",
	"Trading",
	"Tribute",
	"UCS Server",
	"WebInterface Server",
	"World Server",
	"Zone Server",
	"MySQL Error",
	"MySQL Query",
	"Mercenaries",
	"Quest Debug",
	"Packet :: Server -> Client",
	"Packet :: Client -> Server Unhandled",
	"Packet :: Server -> Client (Dump)",
	"Packet :: Client -> Server (Dump)",
	"Login Server",
	"Client Login",
	"Headless Client",
	"HP Update",
	"FixZ",
	"Food",
	"Traps"
};
}

#define Log(debug_level, log_category, message, ...) do {\
	if (LogSys.log_settings[log_category].is_category_enabled == 1)\
		LogSys.Out(debug_level, log_category, message, ##__VA_ARGS__);\
} while (0)

#define LogF(debug_level, log_category, message, ...) do {\
	if (LogSys.log_settings[log_category].is_category_enabled == 1)\
		LogSys.OutF(debug_level, log_category, message, ##__VA_ARGS__);\
} while (0)

class EQEmuLogSys {
public:
	EQEmuLogSys();
	~EQEmuLogSys();

	void CloseFileLogs(); /* Close File Logs wherever necessary, either at zone shutdown or entire process shutdown for everything else. This should be handled on deconstructor but to be safe we use it anyways. */
	void LoadLogSettingsDefaults(); /* Initializes log_settings and sets some defaults if DB is not present */
	void MakeDirectory(const std::string &directory_name); /* Platform independent way of performing a MakeDirectory based on name */
	/*
		The one and only Logging function that uses a debug level as a parameter, as well as a log_category
		log_category - defined in Logs::LogCategory::[]
		log_category name resolution works by passing the enum int ID to Logs::LogCategoryName[category_id]

		Example: EQEmuLogSys::Out(Logs::General, Logs::Guilds, "This guild has no leader present");
			- This would pipe the same category and debug level to all output formats, but the internal memory reference of log_settings would
				be checked against to see if that piped output is set to actually process it for the category and debug level
	*/
	void Out(Logs::DebugLevel debug_level, uint16 log_category, std::string message, ...);
	void SetCurrentTimeStamp(char* time_stamp); /* Used in file logs to prepend a timestamp entry for logs */ 
	void StartFileLogs(const std::string &log_name = ""); /* Used to declare the processes file log and to keep it open for later use */

	template <typename... Args>
	void OutF(Logs::DebugLevel debug_level, uint16 log_category, const char *fmt, const Args&... args)
	{
		std::string log_str = fmt::format(fmt, args...);
		Out(debug_level, log_category, log_str);
	}

	/*
		LogSettings Struct

		This struct is the master reference for all settings for each category, and for each output

		log_to_file[category_id] = [1-3] - Sets debug level for category to output to file
		log_to_console[category_id] = [1-3] - Sets debug level for category to output to console
		log_to_gmsay[category_id] = [1-3] - Sets debug level for category to output to gmsay
	*/

	struct LogSettings {
		uint8 log_to_file;
		uint8 log_to_console;
		uint8 log_to_gmsay;
		uint8 is_category_enabled; /* When any log output in a category > 0, set this to 1 as (Enabled) */
	};

	/* Internally used memory reference for all log settings per category.
		These are loaded via DB and have defaults loaded in LoadLogSettingsDefaults.
		Database loaded via Database::LoadLogSettings(log_settings)
	*/
	LogSettings log_settings[Logs::LogCategory::MaxCategoryID];

	bool file_logs_enabled; /* Set when log settings are loaded to determine if keeping a file open is necessary */

	int log_platform; /* Sets Executable platform (Zone/World/UCS) etc. */

	std::string platform_file_name; /* File name used in writing logs */

	uint16 GetGMSayColorFromCategory(uint16 log_category); /* GMSay Client Message colors mapped by category */

	void OnLogHookCallBackZone(std::function<void(uint16 log_type, const std::string&)> f) { on_log_gmsay_hook = f; }

private:
	std::function<void(uint16 log_category, const std::string&)> on_log_gmsay_hook; /* Callback pointer to zone process for hooking logs to zone using GMSay */
	std::string FormatOutMessageString(uint16 log_category, const std::string &in_message); /* Formats log messages like '[Category] This is a log message' */
	std::string GetLinuxConsoleColorFromCategory(uint16 log_category); /* Linux console color messages mapped by category */

	uint16 GetWindowsConsoleColorFromCategory(uint16 log_category); /* Windows console color messages mapped by category */

	void ProcessConsoleMessage(uint16 debug_level, uint16 log_category, const std::string &message); /* ProcessConsoleMessage called via Log */
	void ProcessGMSay(uint16 debug_level, uint16 log_category, const std::string &message); /* ProcessGMSay called via Log */
	void ProcessLogWrite(uint16 debug_level, uint16 log_category, const std::string &message); /* ProcessLogWrite called via Log */
};

extern EQEmuLogSys LogSys;

#endif