messageitem_p.h

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/******************************************************************************
 *
 *  Copyright 2008 Szymon Tomasz Stefanek <pragma@kvirc.net>
 *
 *  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 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 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 MESSAGELIST_MESSAGEITEM_P_H
#define MESSAGELIST_MESSAGEITEM_P_H

#include "messageitem.h"
#include "item_p.h"
#include "messagecore/widgets/annotationdialog.h"
#include <Akonadi/Item>
#include <Akonadi/Monitor>
#include <Akonadi/Tag>
#include <KJob>
#include <QWeakPointer>
#include <QCache>

namespace MessageList {
namespace Core {

class MessageItemPrivate : public ItemPrivate
{
public:

  explicit MessageItemPrivate( MessageItem *qq );
  ~MessageItemPrivate();

  const MessageItem::Tag *findTagInternal( const QString &szTagId ) const;

  QList<MessageItem::Tag*> getTagList() const;

  bool tagListInitialized() const;

  const MessageItem::Tag* bestTag() const;

  void invalidateTagCache();

  void invalidateAnnotationCache();

  // This creates mTagList and fills it with useful data
  void fillTagList( const Akonadi::Tag::List &taglist );

  QByteArray mMessageIdMD5;            
  QByteArray mInReplyToIdMD5;          
  QByteArray mReferencesIdMD5;         
  QByteArray mStrippedSubjectMD5;      
  Akonadi::Item mAkonadiItem;
  QWeakPointer<MessageCore::AnnotationEditDialog> mAnnotationDialog;
  MessageItem::ThreadingStatus mThreadingStatus : 4;
  MessageItem::EncryptionState mEncryptionState : 4;
  MessageItem::SignatureState mSignatureState : 4;

  bool mAboutToBeRemoved : 1;       
  bool mSubjectIsPrefixed : 1;      

private:

  // List of all tags. If this is 0, it means we have not yet calculated this list. It is calculated
  // on demand when needed.
  mutable QList< MessageItem::Tag * > * mTagList;
};

class FakeItemPrivate : public MessageItemPrivate
{
  public:
    explicit FakeItemPrivate( FakeItem *qq );
    QList<MessageItem::Tag*> mFakeTags;
};

class TagCache : public QObject
{
  Q_OBJECT
public:
  TagCache();
  void retrieveTags(const Akonadi::Tag::List &tags, MessageItemPrivate *m);
  void cancelRequest(MessageItemPrivate *m);

private Q_SLOTS:
  void onTagAdded(const Akonadi::Tag &);
  void onTagChanged(const Akonadi::Tag &);
  void onTagRemoved(const Akonadi::Tag &);
  void onTagsFetched(KJob*);

private:
  QHash<KJob*, MessageItemPrivate*> mRequests;
  QCache<Akonadi::Tag::Id, Akonadi::Tag> mCache;
  Akonadi::Monitor *mMonitor;
};

}

}

#endif