coredbbackend_p.h

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/* ============================================================
 *
 * This file is a part of digiKam project
 * https://www.digikam.org
 *
 * Date        : 2009-06-07
 * Description : Core database abstract backend.
 *
 * Copyright (C) 2007-2009 by Marcel Wiesweg <marcel dot wiesweg at gmx dot de>
 * Copyright (C) 2010-2022 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_CORE_DB_BACKEND_PRIVATE_H
#define DIGIKAM_CORE_DB_BACKEND_PRIVATE_H
 
// Local includes
 
#include "dbenginebackend_p.h"
#include "coredbwatch.h"
 
namespace Digikam
{
 
class CoreDbWatch;
 
class Q_DECL_HIDDEN CoreDbBackendPrivate : public BdEngineBackendPrivate
{
public:
 
    explicit CoreDbBackendPrivate(CoreDbBackend* const backend)
        : BdEngineBackendPrivate            (backend),
          watch                             (nullptr),
          imageChangesetContainer           (this),
          imageTagChangesetContainer        (this),
          collectionImageChangesetContainer (this),
          albumChangesetContainer           (this),
          tagChangesetContainer             (this),
          albumRootChangesetContainer       (this),
          searchChangesetContainer          (this)
    {
    }
 
public:
 
    CoreDbWatch* watch;
 
public:
 
    void sendToWatch(const ImageChangeset& changeset)
    {
        watch->sendImageChange(changeset);
    }
 
    void sendToWatch(const ImageTagChangeset& changeset)
    {
        watch->sendImageTagChange(changeset);
    }
 
    void sendToWatch(const CollectionImageChangeset& changeset)
    {
        watch->sendCollectionImageChange(changeset);
    }
 
    void sendToWatch(const AlbumChangeset& changeset)
    {
        watch->sendAlbumChange(changeset);
    }
 
    void sendToWatch(const TagChangeset& changeset)
    {
        watch->sendTagChange(changeset);
    }
 
    void sendToWatch(const AlbumRootChangeset& changeset)
    {
        watch->sendAlbumRootChange(changeset);
    }
 
    void sendToWatch(const SearchChangeset& changeset)
    {
        watch->sendSearchChange(changeset);
    }
 
    template <class T>
    class Q_DECL_HIDDEN ChangesetContainer
    {
    public:
 
        explicit ChangesetContainer(CoreDbBackendPrivate* const dd)
            : d(dd)
        {
        }
 
        void recordChangeset(const T& changeset)
        {
            if (d->isInTransaction)
            {
                changesets << changeset;
            }
            else
            {
                d->sendToWatch(changeset);
            }
        }
 
        void sendOut()
        {
            foreach (const T& changeset, changesets)
            {
                d->sendToWatch(changeset);
            }
 
            changesets.clear();
        }
 
    public:
 
        QList<T>                    changesets;
        CoreDbBackendPrivate* const d;
    };
 
public:
 
    ChangesetContainer<ImageChangeset>           imageChangesetContainer;
    ChangesetContainer<ImageTagChangeset>        imageTagChangesetContainer;
    ChangesetContainer<CollectionImageChangeset> collectionImageChangesetContainer;
    ChangesetContainer<AlbumChangeset>           albumChangesetContainer;
    ChangesetContainer<TagChangeset>             tagChangesetContainer;
    ChangesetContainer<AlbumRootChangeset>       albumRootChangesetContainer;
    ChangesetContainer<SearchChangeset>          searchChangesetContainer;
 
public:
 
    void transactionFinished() override
    {
        BdEngineBackendPrivate::transactionFinished();
 
        imageChangesetContainer.sendOut();
        imageTagChangesetContainer.sendOut();
        collectionImageChangesetContainer.sendOut();
        albumChangesetContainer.sendOut();
        tagChangesetContainer.sendOut();
        albumRootChangesetContainer.sendOut();
        searchChangesetContainer.sendOut();
    }
};
 
} // namespace Digikam
 
#endif // DIGIKAM_CORE_DB_BACKEND_PRIVATE_H