/*
  This file is part of KOrganizer.

  Copyright (C) 2009 KDAB (author: Frank Osterfeld <osterfeld@kde.org>)

  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.

  As a special exception, permission is given to link this program
  with any edition of Qt, and distribute the resulting executable,
  without including the source code for Qt in the source distribution.
*/
#ifndef AKONADI_KCAL_UTILS_H
#define AKONADI_KCAL_UTILS_H

#include <Akonadi/Collection>
#include <Akonadi/Item>

#include <KCal/Event>
#include <KCal/Incidence>
#include <KCal/Journal>
#include <KCal/Todo>

#include <KDateTime>
#include <QModelIndex>

namespace KCal {
  class CalFilter;
}

class KUrl;

class QAbstractItemModel;
class QDrag;
class QMimeData;
class QModelIndex;
typedef QList<QModelIndex> QModelIndexList;

namespace Akonadi
{
  /**
   * returns the incidence from an akonadi item, or a null pointer if the item has no such payload
   */
   KCal::Incidence::Ptr incidence( const Akonadi::Item &item );

  /**
   * returns the event from an akonadi item, or a null pointer if the item has no such payload
   */
   KCal::Event::Ptr event( const Akonadi::Item &item );

  /**
   * returns event pointers from an akonadi item, or a null pointer if the item has no such payload
   */
   QList<KCal::Event::Ptr> eventsFromItems( const Akonadi::Item::List &items );

  /**
  * returns the todo from an akonadi item, or a null pointer if the item has no such payload
  */
   KCal::Todo::Ptr todo( const Akonadi::Item &item );

  /**
  * returns the journal from an akonadi item, or a null pointer if the item has no such payload
  */
   KCal::Journal::Ptr journal( const Akonadi::Item &item );

  /**
   * returns whether an Akonadi item contains an incidence
   */
   bool hasIncidence( const Akonadi::Item &item );

  /**
   * returns whether an Akonadi item contains an event
   */
   bool hasEvent( const Akonadi::Item &item );

  /**
   * returns whether an Akonadi item contains a todo
   */
   bool hasTodo( const Akonadi::Item &item );

  /**
   * returns whether an Akonadi item contains a journal
   */
   bool hasJournal( const Akonadi::Item &item );

  /**
  * returns @p true if the URL represents an Akonadi item and has one of the given mimetypes.
  */
   bool isValidIncidenceItemUrl( const KUrl &url, const QStringList &supportedMimeTypes );

   bool isValidIncidenceItemUrl( const KUrl &url );

  /**
  * returns @p true if the mime data object contains any of the following:
  *
  * * An akonadi item with a supported KCal mimetype
  * * an iCalendar
  * * a VCard
  */
   bool canDecode( const QMimeData* mimeData );

   QList<KUrl> incidenceItemUrls( const QMimeData* mimeData );

   QList<KUrl> todoItemUrls( const QMimeData* mimeData );

   bool mimeDataHasTodo( const QMimeData* mimeData );

   QList<KCal::Todo::Ptr> todos( const QMimeData* mimeData, const KDateTime::Spec &timeSpec );

  /**
  * returns @p true if the URL represents an Akonadi item and has one of the given mimetypes.
  */
   bool isValidTodoItemUrl( const KUrl &url );

  /**
  * creates mime data object for dragging an akonadi item containing an incidence
  */
   QMimeData* createMimeData( const Akonadi::Item &item, const KDateTime::Spec &timeSpec );

  /**
  * creates mime data object for dragging akonadi items containing an incidence
  */
   QMimeData* createMimeData( const Akonadi::Item::List &items, const KDateTime::Spec &timeSpec );

  /**
  * creates a drag object for dragging an akonadi item containing an incidence
  */
   QDrag* createDrag( const Akonadi::Item &item, const KDateTime::Spec &timeSpec, QWidget* parent );

  /**
  * creates a drag object for dragging akonadi items containing an incidence
  */
   QDrag* createDrag( const Akonadi::Item::List &items, const KDateTime::Spec &timeSpec, QWidget* parent );

  /**
  * applies a filter to a list of items containing incidences. Items not containing incidences or not matching the filter are removed.
  * Helper method anologous to KCal::CalFilter::apply()
  * @see KCal::CalFilter::apply()
  * @param items the list of items to filter
  * @param filter the filter to apply to the list of items
  * @return the filtered list of items
  */
   Akonadi::Item::List applyCalFilter( const Akonadi::Item::List &items, const KCal::CalFilter* filter );

  /**
  * Shows a modal dialog that allows to select a collection.
  *
  * @param parent The optional parent of the modal dialog.
  * @return The select collection or an invalid collection if
  * there was no collection selected.
  */
   Akonadi::Collection selectCollection( QWidget *parent, const Akonadi::Collection& defaultCollection = Akonadi::Collection());

   Akonadi::Item itemFromIndex( const QModelIndex &index );

   Akonadi::Item::List itemsFromModel( const QAbstractItemModel *model,
                                                               const QModelIndex &parentIndex = QModelIndex(),
                                                               int start = 0,
                                                               int end = -1 );

   Collection collectionFromIndex( const QModelIndex &index );

   Collection::Id collectionIdFromIndex( const QModelIndex &index );

   Collection::List collectionsFromIndexes( const QModelIndexList &indexes );

   QString displayName( const Akonadi::Collection &coll );

}

#endif
