signontrace.h

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/*
 * This file is part of signon
 *
 * Copyright (C) 2009-2010 Nokia Corporation.
 *
 * Contact: Aurel Popirtac <ext-aurel.popirtac@nokia.com>
 * Contact: Alberto Mardegan <alberto.mardegan@canonical.com>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License
 * version 2.1 as published by the Free Software Foundation.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 */
#ifndef SIGNONTRACE_H
#define SIGNONTRACE_H

#include <syslog.h>

#include <QCoreApplication>
#include <QFile>
#include <QDebug>
#include <QDateTime>

#include "signond-common.h"

namespace SignOn {

template <typename T = void>
class SignonTrace
{
    SignonTrace() {}

public:
    ~SignonTrace()
    {
        m_pInstance = NULL;
        closelog();
    }

    static void initialize()
    {
        if (m_pInstance)
            return;

        m_pInstance = new SignonTrace<T>();
        openlog(NULL, LOG_PID, LOG_DAEMON);
        qInstallMsgHandler(output);
    }

    static void output(QtMsgType type, const char *msg)
    {
        if (!m_pInstance)
            return;

        if (!criticalsEnabled()) {
            if (type <= QtCriticalMsg) return;
        } else if (!debugEnabled()) {
            if (type <= QtDebugMsg) return;
        }

        int priority;
        switch (type) {
            case QtWarningMsg: priority = LOG_WARNING; break;
            case QtCriticalMsg: priority = LOG_CRIT; break;
            case QtFatalMsg: priority = LOG_EMERG; break;
            case QtDebugMsg:
                /* fall through */
            default: priority = LOG_INFO; break;
        }

        syslog(priority, "%s", msg);
     }

private:
    static SignonTrace<T> *m_pInstance;
};

static void initializeTrace() {
    SignonTrace<>::initialize();
}

template <typename T>
SignonTrace<T> *SignonTrace<T>::m_pInstance = 0;

} //namespace SignOn

#endif // SIGNONTRACE_H