itemquerybuilder.h

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/* ============================================================
 *
 * This file is a part of digiKam project
 * https://www.digikam.org
 *
 * Date        : 2007-03-22
 * Description : Building complex database SQL queries from search descriptions
 *
 * Copyright (C) 2005      by Renchi Raju <renchi dot raju at gmail dot com>
 * Copyright (C) 2007-2012 by Marcel Wiesweg <marcel dot wiesweg at gmx dot de>
 * Copyright (C) 2012-2022 by Gilles Caulier <caulier dot gilles at gmail dot com>
 *
 * 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, or (at your option)
 * any later version.
 *
 * This program 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.
 *
 * ============================================================ */
 
#ifndef DIGIKAM_ITEM_QUERY_BUILDER_H
#define DIGIKAM_ITEM_QUERY_BUILDER_H
 
// Qt includes
 
#include <QVariant>
#include <QString>
 
// Local includes
 
#include "coredbsearchxml.h"
#include "itemqueryposthooks.h"
#include "digikam_export.h"
 
class QUrl;
 
namespace Digikam
{
 
class DIGIKAM_DATABASE_EXPORT ItemQueryBuilder
{
public:
 
    explicit ItemQueryBuilder();
 
    QString buildQuery(const QString& q, QList<QVariant>* boundValues, ItemQueryPostHooks* const hooks) const;
    QString buildQueryFromUrl(const QUrl& url, QList<QVariant>* boundValues) const;
    QString buildQueryFromXml(const QString& xml, QList<QVariant>* boundValues, ItemQueryPostHooks* const hooks) const;
    QString convertFromUrlToXml(const QUrl& url) const;
 
    void setImageTagPropertiesJoined(bool isJoined);
 
public:
 
    static void addSqlOperator(QString& sql, SearchXml::Operator op, bool isFirst);
    static void addSqlRelation(QString& sql, SearchXml::Relation rel);
    static void addNoEffectContent(QString& sql, SearchXml::Operator op);
 
protected:
 
    void buildGroup(QString& sql, SearchXmlCachingReader& reader,
                    QList<QVariant>* boundValues, ItemQueryPostHooks* const hooks) const;
    bool buildField(QString& sql, SearchXmlCachingReader& reader, const QString& name,
                    QList<QVariant>* boundValues, ItemQueryPostHooks* const hooks) const;
 
    QString possibleDate(const QString& str, bool& exact) const;
 
protected:
 
    QString m_longMonths[12];
    QString m_shortMonths[12];
    bool    m_imageTagPropertiesJoined;
};
 
} // namespace Digikam
 
#endif // DIGIKAM_ITEM_QUERY_BUILDER_H