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/***************************************************************************
Logger.cpp - Kwave log file handling
-------------------
begin : Sat May 17 2014
copyright : (C) 2014 by Thomas Eschenbacher
email : Thomas.Eschenbacher@gmx.de
***************************************************************************/
/***************************************************************************
* *
* 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. *
* *
***************************************************************************/
#include "config.h"
#include <new>
#include <QApplication>
#include <QDateTime>
#include <QFile>
#include <QString>
#include <QTextStream>
#include <QtGlobal>
#include <KAboutData>
#include <KLocalizedString>
#include "libkwave/Logger.h"
#include "libkwave/MessageBox.h"
#include "libkwave/String.h"
// static initializers
QFile *Kwave::Logger::m_logfile = nullptr;
static Kwave::Logger g_logger;
/** helper macro: returns the number of elements in an array */
#define ELEMENTS_OF(__array__) (sizeof(__array__) / sizeof(__array__[0]))
//***************************************************************************
Kwave::Logger::Logger()
{
}
//***************************************************************************
Kwave::Logger::~Logger()
{
if (m_logfile) {
log(nullptr, Kwave::Logger::Info,
_("--- CLOSED / APPLICATION SHUTDOWN ---"));
m_logfile->flush();
delete m_logfile;
m_logfile = nullptr;
}
}
//***************************************************************************
bool Kwave::Logger::open(const QString& filename)
{
if (m_logfile) {
qWarning("reopening log file");
log(nullptr, Kwave::Logger::Info, _("--- CLOSED / REOPEN ---"));
m_logfile->flush();
delete m_logfile;
}
qDebug("logging to file: '%s'", DBG(filename));
QString name(filename);
m_logfile = new(std::nothrow) QFile(name);
Q_ASSERT(m_logfile);
if (m_logfile) m_logfile->open(
QIODevice::WriteOnly | QIODevice::Append | QIODevice::Text);
if (!m_logfile || (!m_logfile->isWritable())) {
if (Kwave::MessageBox::warningContinueCancel(nullptr,
i18n("Failed opening the log file '%1' for writing",
filename)) != KMessageBox::Continue)
{
return false;
}
}
/*
* provide the "header" of an extended log file
* see http://www.w3.org/TR/WD-logfile.html
*/
QTextStream out(m_logfile);
const KAboutData about_data = KAboutData::applicationData();
out << "#Version: 1.0" << Qt::endl;
out << "#Fields: x-status date time x-pid x-message" << Qt::endl;
out << "#Software: " << about_data.displayName() << " "
<< about_data.version() << Qt::endl;
QDateTime now = QDateTime::currentDateTime();
out << "#Start-Date: "
<< now.toString(_("yyyy-MM-dd hh:mm:ss"))
<< Qt::endl;
return true;
}
//***************************************************************************
void Kwave::Logger::log(const QObject *sender,
Kwave::Logger::LogLevel level,
const QString &msg)
{
static const char *str_level[] = {
"DBG", "INF", "WAR", "ERR", "FAT"
};
if (!m_logfile) return;
// NOTE: it would be fine to have a way to find out the instance
// which this message belongs to (TopLevelWidget + MainWidget)
Q_UNUSED(sender)
// translate the log level into a text (syslog format)
const char *x_status = str_level[qBound(
Q_UINT64_C(0),
static_cast<quint64>(level),
static_cast<quint64>(ELEMENTS_OF(str_level)))
];
// get the time stamp
QDateTime now = QDateTime::currentDateTime();
// get the PID of the application
long int x_pid = qApp ? static_cast<long int>(qApp->applicationPid()) : -1;
// format the log log message
// x-status date time x-pid x-message
{
QTextStream out(m_logfile);
out << "<" << x_status << "> " <<
now.toString(_("yyyy-MM-dd hh:mm:ss.zzz")) << " " <<
x_pid << " " << msg << Qt::endl;
}
m_logfile->flush();
}
//***************************************************************************
//***************************************************************************
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