/***************************************************************************
 *   Copyright (C) 2006 by Tobias Koenig <tokoe@kde.org>                   *
 *   Copyright (C) 2009 by Volker Krause <vkrause@kde.org>                 *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU Library General Public License as       *
 *   published by the Free Software Foundation; either version 2 of the    *
 *   License, 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.                          *
 *                                                                         *
 *   You should have received a copy of the GNU Library General Public     *
 *   License along with this program; if not, write to the                 *
 *   Free Software Foundation, Inc.,                                       *
 *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.         *
 ***************************************************************************/

#ifndef AKONADI_ITEMMODIFYHANDLER_H_
#define AKONADI_ITEMMODIFYHANDLER_H_

#include "handler.h"
#include "entities.h"

namespace Akonadi
{
namespace Server
{

/**
  @ingroup akonadi_server_handler

  Handler for the item modification command.

  <h4>Semantics</h4>
  Modifies the selected items. Item selection can happen within the usual three scopes:
  - based on a uid set relative to the currently selected collection
  - based on a uid set (UID)
  - based on a list of remote identifiers within the currently selected collection (RID)

  The following item properties can be modified:
  - the remote identifier (@c REMOTEID)
  - the remote revision (@c REMOTEREVISION)
  - the global identifier (@c GID)
  - resetting the dirty flag indication local changes not yet replicated to the backend (@c DIRTY)
  - adding/deleting/setting item flags (@c FLAGS)
  - setting the item size hint (@c SIZE)
  - changing item attributes
  - changing item payload parts

  If multiple items are selected only the following operations are valid:
  - adding flags
  - removing flags
  - settings flags

  The following operations are only allowed by resources:
  - resetting the dirty flag
  - invalidating the cache
  - modifying the remote identifier
  - modifying the remote revision

  Conflict detection:
  - only available when modifying a single item
  - requires the previous item revision to be provided (@c REV)
*/

class ItemModifyHandler: public Handler
{
public:
    ~ItemModifyHandler() override = default;

    bool parseStream() override;

private:
    bool replaceFlags(const PimItem::List &items, const QSet<QByteArray> &flags, bool &flagsChanged);
    bool addFlags(const PimItem::List &items, const QSet<QByteArray> &flags, bool &flagsChanged);
    bool deleteFlags(const PimItem::List &items, const QSet<QByteArray> &flags, bool &flagsChanged);
    bool replaceTags(const PimItem::List &items, const Scope &tags, bool &tagsChanged);
    bool addTags(const PimItem::List &items, const Scope &tags, bool &tagsChanged);
    bool deleteTags(const PimItem::List &items, const Scope &tags, bool &tagsChanged);
};

} // namespace Server
} // namespace Akonadi

#endif
