service2.h

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/* This file is part of the KDE Project
   Copyright (c) 2008 Sebastian Trueg <trueg@kde.org>
   Copyright (c) 2013 Vishesh Handa <me@vhanda.in>

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public
   License version 2 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
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public License
   along with this library; see the file COPYING.LIB.  If not, write to
   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
   Boston, MA 02110-1301, USA.
*/

#ifndef _NEPOMUK2_SERVICE2_H_
#define _NEPOMUK2_SERVICE2_H_

#include "nepomuk_export.h"
#include "nepomukversion.h"

#include <QtCore/QObject>
#include <QtCore/QCoreApplication>
#include <QtCore/QTextStream>
#include <QtDBus/QDBusConnection>
#include <QtDBus/QDBusConnectionInterface>

#include <KAboutData>
#include <KComponentData>
#include <KApplication>
#include <KCmdLineArgs>

namespace Nepomuk2 {
    class NEPOMUK_EXPORT Service2 : public QObject
    {
        Q_OBJECT

    public:
        template <typename T>
        static int init( int argc, char **argv, const KAboutData& aboutData )
        {
            QCoreApplication app( argc, argv );
            KComponentData data( aboutData, KComponentData::RegisterAsMainComponent );

            const QString name = aboutData.appName();
            const QString dbusName = dbusServiceName( name );

            QTextStream s( stderr );
            QDBusConnectionInterface* busInt = QDBusConnection::sessionBus().interface();
            if( busInt->isServiceRegistered( dbusName ) ) {
                s << "Service " << name << " already running." << endl;
                return 1;
            }

            T* service = new T();
            if( !service->initCommon(name) )
                return 1;

            int rv = app.exec();
            delete service;
            return rv;
        }

        template <typename T>
        static int initUI( int argc, char **argv, const KAboutData& aboutData ) {
            KCmdLineArgs::init( argc, argv, &aboutData );

            KApplication app;
            app.disableSessionManagement();

            // We explicitly remove the MainApplication object cause it inteferes with the ability to
            // properly shut down the nepomuk services
            QDBusConnection con = QDBusConnection::sessionBus();
            con.unregisterObject( QLatin1String("/MainApplication"), QDBusConnection::UnregisterNode );

            const QString name = aboutData.appName();
            const QString dbusName = dbusServiceName( name );

            QTextStream s( stderr );
            QDBusConnectionInterface* busInt = QDBusConnection::sessionBus().interface();
            if( busInt->isServiceRegistered( dbusName ) ) {
                s << "Service " << name << " already running." << endl;
                return 1;
            }

            T* service = new T();
            if( !service->initCommon(name) )
                return 1;

            int rv = app.exec();
            delete service;
            return rv;
        }

        static QString dbusServiceName( const QString& serviceName );

        Service2( QObject* parent = 0, bool delayedInitialization = false );

        virtual ~Service2();

        QString name();

        QString description();

        QString dbusServiceName();

    protected:
        void setServiceInitialized( bool success );

        bool initCommon( const QString& name );
    private:
        class Private;
        Private* const d;
    };
}


#endif