/*
    This file is part of KAddressBook.

    Copyright (c) 2009 Tobias Koenig <tokoe@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.
*/

#include "contactsorter.h"

#include <kabc/addressee.h>

class ContactSortHelper
{
  public:
    ContactSortHelper( ContactFields::Field field, Qt::SortOrder sortOrder )
      : mSortField( field ), mSortOrder( sortOrder )
    {
    }

    inline bool operator()( const KABC::Addressee &contact, const KABC::Addressee &otherContact ) const
    {
      int result = QString::localeAwareCompare( ContactFields::value( mSortField, contact ),
                                                ContactFields::value( mSortField, otherContact ) );
      if ( result == 0 ) {
        int givenNameResult = QString::localeAwareCompare( ContactFields::value( ContactFields::GivenName, contact ),
                                                           ContactFields::value( ContactFields::GivenName, otherContact ) );
        if ( givenNameResult == 0 ) {
          int familyNameResult = QString::localeAwareCompare( ContactFields::value( ContactFields::FamilyName, contact ),
                                                              ContactFields::value( ContactFields::FamilyName, otherContact ) );
          if ( familyNameResult == 0 ) {
            result = QString::localeAwareCompare( ContactFields::value( ContactFields::FormattedName, contact ),
                                                  ContactFields::value( ContactFields::FormattedName, otherContact ) );
          } else
            result = familyNameResult;
        } else
          result = givenNameResult;
      }

      bool lesser = result < 0;

      if ( mSortOrder == Qt::DescendingOrder )
        lesser = !lesser;

      return lesser;
    }

  private:
    const ContactFields::Field mSortField;
    const Qt::SortOrder mSortOrder;
};

ContactSorter::ContactSorter( ContactFields::Field field, Qt::SortOrder sortOrder )
  : mSortField( field ), mSortOrder( sortOrder )
{
}

void ContactSorter::sort( QList<KABC::Addressee> &contacts ) const
{
  qStableSort( contacts.begin(), contacts.end(), ContactSortHelper( mSortField, mSortOrder ) );
}
