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/*
* The Mana Server
* Copyright (C) 2004-2010 The Mana World Development Team
* Copyright (C) 2010 The Mana Development Team
*
* This file is part of The Mana Server.
*
* The Mana Server 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
* any later version.
*
* The Mana Server 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 The Mana Server. If not, see <http://www.gnu.org/licenses/>.
*/
#include "logger.h"
#include "common/configuration.h"
#include "common/resourcemanager.h"
#include "utils/string.h"
#include "utils/time.h"
#include <fstream>
#include <iostream>
#ifdef WIN32
#include <windows.h>
#endif
namespace utils
{
/** Log file. */
static std::ofstream mLogFile;
/** current log filename */
std::string Logger::mFilename;
/** Timestamp flag. */
bool Logger::mHasTimestamp = true;
/** Tee mode flag. */
bool Logger::mTeeMode = false;
/** Verbosity level. */
Logger::Level Logger::mVerbosity = Logger::Info;
/** Enables logrotation by size of the logfile. */
bool Logger::mLogRotation = false;
/** Maximum size of current logfile. */
long Logger::mMaxFileSize = 1024; // 1 Mb
/** Switch log file each day. */
bool Logger::mSwitchLogEachDay = false;
/** Last call date */
static std::string mLastCallDate;
/**
* Old date
* For code simplificatiion, the old Date is kept separate
* from the last call date.
*/
static std::string mOldDate;
/**
* Check whether the day has changed since the last call.
*
* @return whether the day has changed.
*/
static bool getDayChanged()
{
std::string dayDate = getCurrentDate();
if (mLastCallDate != dayDate)
{
// Keep track of the old date.
mOldDate = mLastCallDate;
// Reset the current date for next call.
mLastCallDate = dayDate;
return true;
}
return false;
}
void Logger::initialize(const std::string &logFile)
{
setLogFile(logFile, true);
// Write the messages to both the screen and the log file.
setTeeMode(Configuration::getBoolValue("log_toStandardOutput", true));
LOG_INFO("Using log file: " << logFile);
// Set up the options related to log rotation.
setLogRotation(Configuration::getBoolValue("log_enableRotation", false));
setMaxLogfileSize(Configuration::getValue("log_maxFileSize", 1024));
setSwitchLogEachDay(Configuration::getBoolValue("log_perDay", false));
}
void Logger::output(std::ostream &os, const std::string &msg, const char *prefix)
{
if (mHasTimestamp)
{
os << "[" << getCurrentTime() << "]" << ' ';
}
if (prefix)
{
os << prefix << ' ';
}
os << msg << std::endl;
}
void Logger::setLogFile(const std::string &logFile, bool append)
{
// Close the current log file.
if (mLogFile.is_open())
{
mLogFile.close();
}
// Open the file for output
// and remove the former file contents depending on the append flag.
mLogFile.open(logFile.c_str(),
append ? std::ios::app : std::ios::trunc);
mFilename = logFile;
mLastCallDate = mOldDate = getCurrentDate();
if (!mLogFile.is_open())
{
throw std::ios::failure("unable to open " + logFile + "for writing");
}
else
{
// By default the streams do not throw any exception
// let std::ios::failbit and std::ios::badbit throw exceptions.
mLogFile.exceptions(std::ios::failbit | std::ios::badbit);
}
}
void Logger::output(const std::string &msg, Level atVerbosity)
{
if (mVerbosity >= atVerbosity)
{
static const char *prefixes[] =
{
#ifdef T_COL_LOG
"[\033[45mFTL\033[0m]",
"[\033[41mERR\033[0m]",
"[\033[43mWRN\033[0m]",
#else
"[FTL]",
"[ERR]",
"[WRN]",
#endif
"[INF]",
"[DBG]"
};
bool open = mLogFile.is_open();
if (open)
{
output(mLogFile, msg, prefixes[atVerbosity]);
switchLogs();
}
if (!open || mTeeMode)
{
output(atVerbosity <= Warn ? std::cerr : std::cout,
msg, prefixes[atVerbosity]);
}
}
}
void Logger::switchLogs()
{
// Handles logswitch if enabled
// and if at least one switch condition permits it.
if (!mLogRotation || (mMaxFileSize <= 0 && !mSwitchLogEachDay))
return;
// Update current filesize
long fileSize = mLogFile.tellp();
bool dayJustChanged = getDayChanged();
if ((fileSize >= (mMaxFileSize * 1024))
|| (mSwitchLogEachDay && dayJustChanged))
{
// Close logfile, rename it and open a new one
mLogFile.flush();
mLogFile.close();
// Stringify the time, the format is: path/yyyy-mm-dd-n_logFilename.
using namespace std;
ostringstream os;
os << (dayJustChanged ? mOldDate : getCurrentDate());
int fileNum = 1;
ResourceManager::splittedPath filePath =
ResourceManager::splitFileNameAndPath(mFilename);
std::string newFileName;
// Keeping a hard limit of 100 files per day.
do
{
newFileName = filePath.path + os.str()
+ "-" + toString<int>(fileNum)
+ "_" + filePath.file;
}
while (ResourceManager::exists(newFileName, false) && ++fileNum < 100);
if (rename(mFilename.c_str(), newFileName.c_str()) != 0)
{
// Continue appending on the original file.
setLogFile(mFilename, true);
mLogFile << "Error renaming file: " << mFilename << " to: "
<< newFileName << std::endl << "Keep logging on the same log file."
<< std::endl;
}
else
{
// Keep the logging after emptying the original log file.
setLogFile(mFilename);
mLogFile << "---- Continue logging from former file " << newFileName
<< " ----" << std::endl;
}
}
}
} // namespace utils
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