Log.h

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/*
 * This file is part of the TrinityCore Project. See AUTHORS file for Copyright information
 *
 * 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; either version 2 of the License, or (at your
 * option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; 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, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef TRINITYCORE_LOG_H
#define TRINITYCORE_LOG_H
 
#include "Define.h"
#include "AsioHacksFwd.h"
#include "LogCommon.h"
#include "StringFormat.h"
 
#include <memory>
#include <unordered_map>
#include <vector>
 
class Appender;
class Logger;
struct LogMessage;
 
namespace Trinity
{
    namespace Asio
    {
        class IoContext;
    }
}
 
#define LOGGER_ROOT "root"
 
typedef Appender*(*AppenderCreatorFn)(uint8 id, std::string const& name, LogLevel level, AppenderFlags flags, std::vector<std::string_view> const& extraArgs);
 
template <class AppenderImpl>
Appender* CreateAppender(uint8 id, std::string const& name, LogLevel level, AppenderFlags flags, std::vector<std::string_view> const& extraArgs)
{
    return new AppenderImpl(id, name, level, flags, extraArgs);
}
 
class TC_COMMON_API Log
{
    typedef std::unordered_map<std::string, Logger> LoggerMap;
 
    private:
        Log();
        ~Log();
        Log(Log const&) = delete;
        Log(Log&&) = delete;
        Log& operator=(Log const&) = delete;
        Log& operator=(Log&&) = delete;
 
    public:
        static Log* instance();
 
        void Initialize(Trinity::Asio::IoContext* ioContext);
        void SetSynchronous();  // Not threadsafe - should only be called from main() after all threads are joined
        void LoadFromConfig();
        void Close();
        bool ShouldLog(std::string const& type, LogLevel level) const;
        bool SetLogLevel(std::string const& name, int32 level, bool isLogger = true);
 
        template<typename... Args>
        void OutMessage(std::string_view filter, LogLevel const level, Trinity::FormatString<Args...> fmt, Args&&... args)
        {
            this->OutMessageImpl(filter, level, fmt, Trinity::MakeFormatArgs(args...));
        }
 
        template<typename... Args>
        void OutCommand(uint32 account, Trinity::FormatString<Args...> fmt, Args&&... args)
        {
            if (!ShouldLog("commands.gm", LOG_LEVEL_INFO))
                return;
 
            this->OutCommandImpl(account, fmt, Trinity::MakeFormatArgs(args...));
        }
 
        void OutCharDump(char const* str, uint32 account_id, uint64 guid, char const* name);
 
        void SetRealmId(uint32 id);
 
        template<class AppenderImpl>
        void RegisterAppender()
        {
            this->RegisterAppender(AppenderImpl::type, &CreateAppender<AppenderImpl>);
        }
 
        std::string const& GetLogsDir() const { return m_logsDir; }
        std::string const& GetLogsTimestamp() const { return m_logsTimestamp; }
 
    private:
        static std::string GetTimestampStr();
        void write(std::unique_ptr<LogMessage> msg) const;
 
        Logger const* GetLoggerByType(std::string const& type) const;
        Appender* GetAppenderByName(std::string_view name);
        uint8 NextAppenderId();
        void CreateAppenderFromConfig(std::string const& name);
        void CreateLoggerFromConfig(std::string const& name);
        void ReadAppendersFromConfig();
        void ReadLoggersFromConfig();
        void RegisterAppender(uint8 index, AppenderCreatorFn appenderCreateFn);
        void OutMessageImpl(std::string_view filter, LogLevel level, Trinity::FormatStringView messageFormat, Trinity::FormatArgs messageFormatArgs);
        void OutCommandImpl(uint32 account, Trinity::FormatStringView messageFormat, Trinity::FormatArgs messageFormatArgs);
 
        std::unordered_map<uint8, AppenderCreatorFn> appenderFactory;
        std::unordered_map<uint8, std::unique_ptr<Appender>> appenders;
        std::unordered_map<std::string, std::unique_ptr<Logger>> loggers;
        uint8 AppenderId;
        LogLevel lowestLogLevel;
 
        std::string m_logsDir;
        std::string m_logsTimestamp;
 
        Trinity::Asio::IoContext* _ioContext;
        Trinity::Asio::Strand* _strand;
};
 
#define sLog Log::instance()
 
#ifdef PERFORMANCE_PROFILING
#define TC_LOG_MESSAGE_BODY(filterType__, level__, ...) ((void)0)
#elif TRINITY_PLATFORM != TRINITY_PLATFORM_WINDOWS
 
// This will catch format errors on build time
#define TC_LOG_MESSAGE_BODY(filterType__, level__, ...)                 \
        do {                                                            \
            if (sLog->ShouldLog(filterType__, level__))                 \
                sLog->OutMessage(filterType__, level__, __VA_ARGS__);   \
        } while (0)
#else
#define TC_LOG_MESSAGE_BODY(filterType__, level__, ...)                 \
        __pragma(warning(push))                                         \
        __pragma(warning(disable:4127))                                 \
        do {                                                            \
            if (sLog->ShouldLog(filterType__, level__))                 \
                sLog->OutMessage(filterType__, level__, __VA_ARGS__);   \
        } while (0)                                                     \
        __pragma(warning(pop))
#endif
 
#define TC_LOG_TRACE(filterType__, ...) \
    TC_LOG_MESSAGE_BODY(filterType__, LOG_LEVEL_TRACE, __VA_ARGS__)
 
#define TC_LOG_DEBUG(filterType__, ...) \
    TC_LOG_MESSAGE_BODY(filterType__, LOG_LEVEL_DEBUG, __VA_ARGS__)
 
#define TC_LOG_INFO(filterType__, ...)  \
    TC_LOG_MESSAGE_BODY(filterType__, LOG_LEVEL_INFO, __VA_ARGS__)
 
#define TC_LOG_WARN(filterType__, ...)  \
    TC_LOG_MESSAGE_BODY(filterType__, LOG_LEVEL_WARN, __VA_ARGS__)
 
#define TC_LOG_ERROR(filterType__, ...) \
    TC_LOG_MESSAGE_BODY(filterType__, LOG_LEVEL_ERROR, __VA_ARGS__)
 
#define TC_LOG_FATAL(filterType__, ...) \
    TC_LOG_MESSAGE_BODY(filterType__, LOG_LEVEL_FATAL, __VA_ARGS__)
 
#endif