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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* camel-folder-utils : Utility for camel folders */


/* 
 *
 * Author : 
 *  Bertrand Guiheneuf <Bertrand.Guiheneuf@aful.org>
 *
 * Copyright 1999, 2000 HelixCode (http://www.helixcode.com) .
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 * USA
 */


#include "camel-folder-utils.h"
#include "camel-mime-message.h"



/*  Active Message List utilities */

/* */
gint
camel_mime_message_number_cmp (gconstpointer a, gconstpointer b)
{
    CamelMimeMessage *m_a = CAMEL_MIME_MESSAGE (a);
    CamelMimeMessage *m_b = CAMEL_MIME_MESSAGE (b);

    return (m_a->message_number - (m_b->message_number));
}


/**
 * camel_aml_expunge_messages: Expunge the message marked as deleted in an Active Message List
 * @aml: active message list
 * @folder: folder object
 * 
 * Expunge the message flagged as "DELETED" in an active message list. 
 * The messages are not freed nor really expunged on the disk, they
 * are just removed from the active message list and marked as 
 * "EXPUNGED". The list of the message which have been expunged is
 * return in a GList which must be freed by the caller. 
 * To be really expunged the providers must provide or call
 * folder specific methods.
 * 
 * Return value: the list of expunged messages.
 **/
GList *
camel_aml_expunge_messages (GList *aml, 
                CamelFolder *folder)
{
    CamelMimeMessage *message;
    GList *message_node;
    GList *next_message_node;
    guint nb_expunged = 0;  
    GList *expunged_messages;
    
    message_node = folder->message_list;

    /* look in folder message list which messages
     * need to be expunged  */
    while ( message_node) {
        message = CAMEL_MIME_MESSAGE (message_node->data);

        /* we may free message_node so get the next node now */
        next_message_node = message_node->next;

        if (message) {          
            if (camel_mime_message_get_flag (message, "DELETED")) {
                
                /* remove the message from active message list */
                g_list_remove_link (folder->message_list, message_node);
                g_list_free_1 (message_node);
                camel_mime_message_set_flag (message, "EXPUNGED", TRUE);
                expunged_messages = g_list_prepend (expunged_messages, message);
                
            } 
        }
        else {
            CAMEL_LOG_WARNING ("CamelFolder::expunge warning message_node contains no message\n");
        }
        message_node = next_message_node;
        CAMEL_LOG_FULL_DEBUG ("CamelFolder::expunge, examined message node %p\n", message_node);
    }
    
    return expunged_messages;
}