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/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/* 
 * Copyright (C) 2005  Novell, Inc.
 *
 * Authors: Michael Zucchi <notzed@novell.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 *
 * 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.
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <errno.h>
#include <string.h>
#include <bonobo/bonobo-i18n.h>
#include <bonobo/bonobo-exception.h>
#include <bonobo/bonobo-arg.h>
#include "evolution-mail-messageiterator.h"

#include <camel/camel-folder.h>

#include "e-corba-utils.h"

#define d(x)

#define PARENT_TYPE bonobo_object_get_type ()

static BonoboObjectClass *parent_class = NULL;

#define _PRIVATE(o) (g_type_instance_get_private ((GTypeInstance *)o, evolution_mail_messageiterator_get_type()))

struct _EvolutionMailMessageIteratorPrivate {
    int index;
    CamelFolder *folder;
    char *expr;
    GPtrArray *search;
};

/* GObject methods */

static void
impl_dispose (GObject *object)
{
    (* G_OBJECT_CLASS (parent_class)->dispose) (object);
}

static void
impl_finalize (GObject *object)
{
    struct _EvolutionMailMessageIteratorPrivate *p = _PRIVATE(object);

    d(printf("EvolutionMailMessageIterator: finalise\n"));

    if (*p->expr)
        camel_folder_search_free(p->folder, p->search);
    else
        camel_folder_free_uids(p->folder, p->search);

    g_free(p->expr);
    camel_object_unref(p->folder);

    (* G_OBJECT_CLASS (parent_class)->finalize) (object);
}

/* Evolution.Mail.MessageIterator */
static Evolution_Mail_MessageInfos *
impl_next(PortableServer_Servant _servant, const CORBA_long limit, CORBA_Environment * ev)
{
    EvolutionMailMessageIterator *emf = (EvolutionMailMessageIterator *)bonobo_object_from_servant(_servant);
    int i, j;
    Evolution_Mail_MessageInfos *msgs;
    struct _EvolutionMailMessageIteratorPrivate *p = _PRIVATE(emf);
    CamelException ex = { 0 };

    if (p->search == NULL) {
        if (*p->expr)
            p->search = camel_folder_search_by_expression(p->folder, p->expr, &ex);
        else
            p->search = camel_folder_get_uids(p->folder);

        if (camel_exception_is_set(&ex)) {
            camel_exception_clear(&ex);
            return NULL;
        }

        p->index = 0;
    }

    msgs = Evolution_Mail_MessageInfos__alloc();
    msgs->_maximum = MIN(limit, p->search->len - p->index);
    msgs->_buffer = Evolution_Mail_MessageInfos_allocbuf(msgs->_maximum);
    CORBA_sequence_set_release(msgs, CORBA_TRUE);

    j=0;
    for (i=p->index;i<p->search->len && j<msgs->_maximum;i++) {
        CamelMessageInfo *info = camel_folder_get_message_info(p->folder, p->search->pdata[i]);

        if (info) {
            e_mail_messageinfo_set_message(&msgs->_buffer[j], info);
            j++;
            camel_message_info_free(info);
        }
    }

    p->index = i;
    msgs->_length = j;

    return msgs;
}

static void
impl_mi_dispose(PortableServer_Servant _servant, CORBA_Environment *ev)
{
    EvolutionMailMessageIterator *emmi = (EvolutionMailMessageIterator *)bonobo_object_from_servant(_servant);

    bonobo_object_set_immortal((BonoboObject *)emmi, FALSE);
    bonobo_object_unref((BonoboObject *)emmi);
}

/* Initialization */

static void
evolution_mail_messageiterator_class_init (EvolutionMailMessageIteratorClass *klass)
{
    POA_Evolution_Mail_MessageIterator__epv *epv = &klass->epv;
    GObjectClass *object_class = G_OBJECT_CLASS (klass);

    parent_class = g_type_class_peek_parent (klass);

    epv->next = impl_next;
    epv->dispose = impl_mi_dispose;

    object_class->dispose = impl_dispose;
    object_class->finalize = impl_finalize;

    g_type_class_add_private(klass, sizeof(struct _EvolutionMailMessageIteratorPrivate));
}

static void
evolution_mail_messageiterator_init(EvolutionMailMessageIterator *emi, EvolutionMailMessageIteratorClass *klass)
{
    bonobo_object_set_immortal((BonoboObject *)emi, TRUE);
}

BONOBO_TYPE_FUNC_FULL (EvolutionMailMessageIterator, Evolution_Mail_MessageIterator, PARENT_TYPE, evolution_mail_messageiterator)

EvolutionMailMessageIterator *
evolution_mail_messageiterator_new(CamelFolder *folder, const char *expr)
{
    EvolutionMailMessageIterator *emf = g_object_new(evolution_mail_messageiterator_get_type(), NULL);
    struct _EvolutionMailMessageIteratorPrivate *p = _PRIVATE(emf);

    p->folder = folder;
    camel_object_ref(folder);
    p->expr = g_strdup(expr);

    return emf;
}