//
// Copyright (C) 2001-2004 Red Hat Inc. All Rights Reserved.
//
// This library 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 2.1 of
// the License, or (at your option) any later version.
//
// This library 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 this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
// $Id: ThreadedMessage.pdl 287 2005-02-22 00:29:02Z sskracic $
// $DateTime: 2004/08/16 18:10:38 $
model com.arsdigita.messaging;

object type ThreadedMessage extends Message {

    BigDecimal[0..1] root = messages.root_id INTEGER;
    String[0..1] sortKey = messages.sort_key VARCHAR(300);

    insert {

        do {
            update messages
                set   root_id    = :root,
                      sort_key   = :sortKey
                where message_id = :id
        }
    }

}

// Used for sort key generation when we need to lookup the current
// maximum.  The only way to use this right now is to execute the
// query and select the first element.  This should always be used in
// conjunction with a filter that limits the number of sort_keys
// selected, and therefore should execute reasonably fast.

query maxSortKey {
    BigDecimal root;
    BigDecimal inReplyTo;
    String sortKey;
    BigDecimal sortSize;
    do {
         select   root_id,
                  sort_key,
		  in_reply_to,
                  length(sort_key) as sort_size
         from     messages 
         order by sort_key desc
    } map {
         root      = root_id;
	 inReplyTo = in_reply_to;
         sortKey   = sort_key;
         sortSize  = sort_size;
    }
}