/*
  Copyright (C) 2004 SKYRIX Software AG

  This file is part of OpenGroupware.org.

  OGo is free software; you can redistribute it and/or modify it under
  the terms of the GNU Lesser General Public License as published by the
  Free Software Foundation; either version 2, or (at your option) any
  later version.

  OGo 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 Lesser General Public
  License for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with OGo; see the file COPYING.  If not, write to the
  Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  02111-1307, USA.
*/
// $Id: NSObject+AptComparison.m 620 2005-03-02 19:57:10Z znek $

#include "NSObject+AptComparison.h"
#include <NGExtensions/NGCalendarDateRange.h>
#include "common.h"

@implementation NSObject (SOGoAptComparison)

- (NSComparisonResult)compareAptsAscending:(id)_other {
  NSCalendarDate      *sd, *ed;
  NGCalendarDateRange *r1, *r2;
  NSComparisonResult  result;
  NSTimeInterval      t1, t2;
  
  sd = [self valueForKey:@"startDate"];
  ed = [self valueForKey:@"endDate"];
  r1 = [NGCalendarDateRange calendarDateRangeWithStartDate:sd
                            endDate:ed];
  
  sd = [_other valueForKey:@"startDate"];
  ed = [_other valueForKey:@"endDate"];
  r2 = [NGCalendarDateRange calendarDateRangeWithStartDate:sd
                            endDate:ed];
  
  result = [r1 compare:r2];
  if (result != NSOrderedSame)
    return result;
  
  t1 = [r1 duration];
  t2 = [r2 duration];
  if (t1 == t2)
    return NSOrderedSame;
  if (t1 > t2)
    return NSOrderedDescending;
  return NSOrderedAscending;
}

@end