folder.h

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/*
   Copyright (c) 2008-2010 Sebastian Trueg <trueg@kde.org>

   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 _NEPOMUK_VIRTUAL_FOLDER_H_
#define _NEPOMUK_VIRTUAL_FOLDER_H_

#include <QtCore/QObject>

#include "query/result.h"
#include "query/query.h"

#include <QtCore/QSet>
#include <QtCore/QTimer>
#include <QtCore/QPointer>
#include <QtCore/QMutex>
#include <Soprano/Model>

#include <KUrl>

namespace Nepomuk2 {
    namespace Query {

        uint qHash( const Result& );

        class SearchRunnable;
        class CountQueryRunnable;
        class FolderConnection;

        class Folder : public QObject
        {
            Q_OBJECT

        public:
            Folder( Soprano::Model* model, const Query& query, QObject* parent = 0 );
            Folder( Soprano::Model* model, const QString& sparqlQuery,
                    const RequestPropertyMap& requestProps, QObject* parent = 0 );
            ~Folder();

            bool isSparqlQueryFolder() const { return m_isSparqlQueryFolder; }

            QList<Result> entries() const;

            bool initialListingDone() const;

            QList<FolderConnection*> openConnections() const;

            Query query() const { return m_query; }

            QString sparqlQuery() const;

            RequestPropertyMap requestPropertyMap() const;

            int getResultCount() const { return m_resultCount; }

        private Q_SLOTS:
            void addResult( const Nepomuk2::Query::Result& result );
            void listingFinished();

            void update();

            void countQueryFinished( int count );

        Q_SIGNALS:
            void newEntries( const QList<Nepomuk2::Query::Result>& entries );
            void entriesRemoved( const QList<QUrl>& entries );
            void entriesRemoved( const QList<Nepomuk2::Query::Result>& entries );

            void resultCount( int count );

            void finishedListing();
            void aboutToBeDeleted( Nepomuk2::Query::Folder* );

        private Q_SLOTS:
            void slotStorageChanged();
            void slotUpdateTimeout();

        private:
            void init();

            void addConnection( FolderConnection* );

            void removeConnection( FolderConnection* );

            const bool m_isSparqlQueryFolder;

            Query m_query;

            QString m_sparqlQuery;

            RequestPropertyMap m_requestProperties;

            Soprano::Model* m_model;

            QList<FolderConnection*> m_connections;

            int m_resultCount;

            bool m_initialListingDone;

            QHash<QUrl, Result> m_results;

            QHash<QUrl, Result> m_newResults;

            SearchRunnable* m_currentSearchRunnable;
            CountQueryRunnable* m_currentCountQueryRunnable;

            bool m_storageChanged;

            QTimer m_updateTimer;

            // for addConnection and removeConnection
            friend class FolderConnection;
        };
    }
}

#endif