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/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/* evolution-importer.c
 *
 * Copyright (C) 2000  Helix Code, Inc.
 *
 * 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.
 *
 * Author: Iain Holmes  <iain@helixcode.com>
 */

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

#include <bonobo/bonobo-object.h>
#include <gal/util/e-util.h>

#include "GNOME_Evolution_Importer.h"
#include "evolution-importer.h"


#define PARENT_TYPE BONOBO_X_OBJECT_TYPE
static BonoboObjectClass *parent_class = NULL;

struct _EvolutionImporterPrivate {
    EvolutionImporterLoadFileFn load_file_fn;
    EvolutionImporterSupportFormatFn support_format_fn;
    EvolutionImporterProcessItemFn process_item_fn;
    EvolutionImporterGetErrorFn get_error_fn;

    void *closure;
};


static inline EvolutionImporter *
evolution_importer_from_servant (PortableServer_Servant servant)
{
    return EVOLUTION_IMPORTER (bonobo_object_from_servant (servant));
}

static CORBA_boolean
impl_GNOME_Evolution_Importer_supportFormat (PortableServer_Servant servant,
                         const CORBA_char *filename,
                         CORBA_Environment *ev)
{
    EvolutionImporter *importer;
    EvolutionImporterPrivate *priv;

    importer = evolution_importer_from_servant (servant);
    priv = importer->priv;

    if (priv->support_format_fn != NULL)
        return (priv->support_format_fn) (importer, filename, 
                          priv->closure);
    else
        return FALSE;
}

static CORBA_boolean
impl_GNOME_Evolution_Importer_loadFile (PortableServer_Servant servant,
                    const CORBA_char *filename,
                    CORBA_Environment *ev)
{
    EvolutionImporter *importer;
    EvolutionImporterPrivate *priv;

    importer = evolution_importer_from_servant (servant);
    priv = importer->priv;

    if (priv->load_file_fn != NULL)
        return (priv->load_file_fn) (importer, filename, priv->closure);
    else
        return FALSE;
}

static void
impl_GNOME_Evolution_Importer_processItem (PortableServer_Servant servant,
                       GNOME_Evolution_ImporterListener listener,
                       CORBA_Environment *ev)
{
    EvolutionImporter *importer;
    EvolutionImporterPrivate *priv;

    importer = evolution_importer_from_servant (servant);
    priv = importer->priv;

    if (priv->process_item_fn != NULL)
        (priv->process_item_fn) (importer, listener, priv->closure, ev);
    else
        GNOME_Evolution_ImporterListener_notifyResult (listener,
                                   GNOME_Evolution_ImporterListener_UNSUPPORTED_OPERATION, FALSE, ev);
}

static CORBA_char *
impl_GNOME_Evolution_Importer_getError (PortableServer_Servant servant,
                    CORBA_Environment *ev)
{
    EvolutionImporter *importer;
    EvolutionImporterPrivate *priv;
    CORBA_char *out_str;

    importer = evolution_importer_from_servant (servant);
    priv = importer->priv;

    if (priv->get_error_fn != NULL) {
        out_str = (priv->get_error_fn) (importer, priv->closure);
        return CORBA_string_dup (out_str ? out_str : "");
    } else
        return CORBA_string_dup ("");
}


static void
destroy (GtkObject *object)
{
    EvolutionImporter *importer;
    EvolutionImporterPrivate *priv;

    importer = EVOLUTION_IMPORTER (object);
    priv = importer->priv;

    if (priv == NULL)
        return;

    g_free (priv);
    importer->priv = NULL;

    GTK_OBJECT_CLASS (parent_class)->destroy (object);
}

static void
evolution_importer_class_init (EvolutionImporterClass *klass)
{
    GtkObjectClass *object_class;
    POA_GNOME_Evolution_Importer__epv *epv = &klass->epv;

    object_class = GTK_OBJECT_CLASS (klass);
    object_class->destroy = destroy;

    parent_class = gtk_type_class (PARENT_TYPE);
    epv->supportFormat = impl_GNOME_Evolution_Importer_supportFormat;
    epv->loadFile = impl_GNOME_Evolution_Importer_loadFile;
    epv->processItem = impl_GNOME_Evolution_Importer_processItem;
    epv->getError = impl_GNOME_Evolution_Importer_getError;
}

static void
evolution_importer_init (EvolutionImporter *importer)
{
    EvolutionImporterPrivate *priv;

    priv = g_new0 (EvolutionImporterPrivate, 1);

    importer->priv = priv;
}



static void
evolution_importer_construct (EvolutionImporter *importer,
                  EvolutionImporterSupportFormatFn support_format_fn,
                  EvolutionImporterLoadFileFn load_file_fn,
                  EvolutionImporterProcessItemFn process_item_fn,
                  EvolutionImporterGetErrorFn get_error_fn,
                  void *closure)
{
    EvolutionImporterPrivate *priv;

    g_return_if_fail (importer != NULL);
    g_return_if_fail (EVOLUTION_IS_IMPORTER (importer));
    g_return_if_fail (support_format_fn != NULL);
    g_return_if_fail (load_file_fn != NULL);
    g_return_if_fail (process_item_fn != NULL);

    priv = importer->priv;
    priv->support_format_fn = support_format_fn;
    priv->load_file_fn = load_file_fn;
    priv->process_item_fn = process_item_fn;
    priv->get_error_fn = get_error_fn;

    priv->closure = closure;
}

/**
 * evolution_importer_new:
 * @support_format_fn: The function to be called by the supportFormat method.
 * @load_file_fn: The function to be called by the loadFile method.
 * @process_item_fn: The function to be called by the processItem method.
 * @get_error_fn: The function to be called by the getError method.
 * @closure: The data to be passed to all of the above functions.
 *
 * Creates a new EvolutionImporter object. Of the parameters only 
 * @get_error_function and @closure may be #NULL.
 *
 * Returns: A newly created EvolutionImporter object.
 */
EvolutionImporter *
evolution_importer_new (EvolutionImporterSupportFormatFn support_format_fn,
            EvolutionImporterLoadFileFn load_file_fn,
            EvolutionImporterProcessItemFn process_item_fn,
            EvolutionImporterGetErrorFn get_error_fn,
            void *closure)
{
    EvolutionImporter *importer;

    importer = gtk_type_new (evolution_importer_get_type ());
    evolution_importer_construct (importer, support_format_fn, load_file_fn,
                      process_item_fn, get_error_fn, closure);
    return importer;
}

BONOBO_X_TYPE_FUNC_FULL (EvolutionImporter,
             GNOME_Evolution_Importer,
             PARENT_TYPE,
             evolution_importer);