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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* camelMedium.c : Abstract class for a medium */


/* 
 *
 * Author : 
 *  Bertrand Guiheneuf <bertrand@helixcode.com>
 *
 * Copyright 1999, 2000 Helix Code, Inc. (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 <config.h>
#include "camel-medium.h"
#include <stdio.h>
#include "gmime-content-field.h"
#include "string-utils.h"
#include "camel-log.h"
#include "gmime-utils.h"
#include "camel-simple-data-wrapper.h"





static CamelDataWrapperClass *parent_class=NULL;

/* Returns the class for a CamelMedium */
#define CM_CLASS(so) CAMEL_MEDIUM_CLASS (GTK_OBJECT(so)->klass)

static void _add_header (CamelMedium *medium, gchar *header_name, gchar *header_value);
static void _remove_header (CamelMedium *medium, const gchar *header_name);
static const gchar *_get_header (CamelMedium *medium, const gchar *header_name);

static CamelDataWrapper *_get_content_object(CamelMedium *medium);
static void _set_content_object(CamelMedium *medium, CamelDataWrapper *content);

static void _finalize (GtkObject *object);

static void
camel_medium_class_init (CamelMediumClass *camel_medium_class)
{
    CamelDataWrapperClass *camel_data_wrapper_class = CAMEL_DATA_WRAPPER_CLASS (camel_medium_class);
    GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (camel_data_wrapper_class);

    parent_class = gtk_type_class (camel_data_wrapper_get_type ());
    
    /* virtual method definition */
    camel_medium_class->add_header = _add_header;
    camel_medium_class->remove_header = _remove_header;
    camel_medium_class->get_header = _get_header;
    
    camel_medium_class->set_content_object = _set_content_object;
    camel_medium_class->get_content_object = _get_content_object;
    
    /* virtual method overload */
    /* camel_data_wrapper_class->write_to_stream = _write_to_stream; */
    /* camel_data_wrapper_class->construct_from_stream = _construct_from_stream; */

    gtk_object_class->finalize = _finalize;
}

static void
camel_medium_init (gpointer   object,  gpointer   klass)
{
    CamelMedium *camel_medium = CAMEL_MEDIUM (object);
    
    camel_medium->headers =  g_hash_table_new (g_str_hash, g_str_equal);
    camel_medium->content =  NULL;
}




GtkType
camel_medium_get_type (void)
{
    static GtkType camel_medium_type = 0;
    
    if (!camel_medium_type) {
        GtkTypeInfo camel_medium_info = 
        {
            "CamelMedium",
            sizeof (CamelMedium),
            sizeof (CamelMediumClass),
            (GtkClassInitFunc) camel_medium_class_init,
            (GtkObjectInitFunc) camel_medium_init,
                /* reserved_1 */ NULL,
                /* reserved_2 */ NULL,
            (GtkClassInitFunc) NULL,
        };
        
        camel_medium_type = gtk_type_unique (camel_data_wrapper_get_type (), &camel_medium_info);
    }
    
    return camel_medium_type;
}


static void
_free_header (gpointer key, gpointer value, gpointer data)
{
    g_free (key);
    g_free (value);
}

static void           
_finalize (GtkObject *object)
{
    CamelMedium *medium = CAMEL_MEDIUM (object);


    CAMEL_LOG_FULL_DEBUG ("Entering CamelMedium::finalize\n");

    if (medium->headers) {
        g_hash_table_foreach (medium->headers, _free_header, NULL);
        g_hash_table_destroy (medium->headers);
    }

    GTK_OBJECT_CLASS (parent_class)->finalize (object);
    CAMEL_LOG_FULL_DEBUG ("Leaving CamelMedium::finalize\n");
}



/* **** */

static void
_add_header (CamelMedium *medium, gchar *header_name, gchar *header_value)
{
    gboolean header_exists;
    gchar *old_header_name;
    gchar *old_header_value;
    

    header_exists = g_hash_table_lookup_extended (medium->headers, header_name, 
                              (gpointer *) &old_header_name,
                              (gpointer *) &old_header_value);
    /* ghashtables actually dont duplicate key pointers on existing fields,
       just remove the old one first always (avoiding this assumption) */
    if (header_exists) {
        g_hash_table_remove (medium->headers, old_header_name);
#if 1
        g_free (old_header_name);
        g_free (old_header_value);
#endif
    }
    g_hash_table_insert (medium->headers, g_strdup (header_name),
                 g_strdup (header_value));
}


void
camel_medium_add_header (CamelMedium *medium, gchar *header_name, gchar *header_value)
{
    CM_CLASS(medium)->add_header(medium, header_name, header_value);
}


/* **** */


static void
_remove_header (CamelMedium *medium, const gchar *header_name)
{
    
    gboolean header_exists;
    gchar *old_header_name;
    gchar *old_header_value;
    
    header_exists = g_hash_table_lookup_extended (medium->headers, header_name, 
                              (gpointer *) &old_header_name,
                              (gpointer *) &old_header_value);
    if (header_exists) {
        g_hash_table_remove (medium->headers, header_name);

        g_free (old_header_name);
        g_free (old_header_value);
    }
}

void
camel_medium_remove_header (CamelMedium *medium, const gchar *header_name)
{
    CM_CLASS(medium)->remove_header(medium, header_name);
}


/* **** */


static const gchar *
_get_header (CamelMedium *medium, const gchar *header_name)
{
    
    gchar *header_value;
    
    header_value = (gchar *)g_hash_table_lookup (medium->headers, header_name);
    return header_value;
}

const gchar *
camel_medium_get_header (CamelMedium *medium, const gchar *header_name)
{
    return CM_CLASS(medium)->get_header (medium, header_name);
}


/* **** */


static CamelDataWrapper *
_get_content_object (CamelMedium *medium)
{
    return medium->content;
    
}


CamelDataWrapper *
camel_medium_get_content_object (CamelMedium *medium)
{
    return CM_CLASS(medium)->get_content_object (medium);
}


/* **** */


static void
_set_content_object (CamelMedium *medium, CamelDataWrapper *content)
{

    CAMEL_LOG_FULL_DEBUG ("Entering CamelMedium::set_content_object\n");
    if (medium->content) {
        CAMEL_LOG_FULL_DEBUG ("CamelMedium::set_content_object unreferencing old content object\n");
        gtk_object_unref (GTK_OBJECT (medium->content));
    }
    gtk_object_ref (GTK_OBJECT (content));
    medium->content = content;
    
}

void 
camel_medium_set_content_object (CamelMedium *medium, CamelDataWrapper *content)
{
    CM_CLASS(medium)->set_content_object (medium, content);
}


/* **** */