/********************************************************************\
 * gnc-lot-xml-v2.c -- lot xml i/o implementation                   *
 *                                                                  *
 * Copyright (C) 2001 James LewisMoss <dres@debian.org>             *
 * Copyright (C) 2002 Linas Vepstas <linas@linas.org>               *
 *                                                                  *
 * 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, contact:                        *
 *                                                                  *
 * Free Software Foundation           Voice:  +1-617-542-5942       *
 * 51 Franklin Street, Fifth Floor    Fax:    +1-617-542-2652       *
 * Boston, MA  02110-1301,  USA       gnu@gnu.org                   *
 *                                                                  *
\********************************************************************/
#include <glib.h>

#include <config.h>
#include <stdlib.h>
#include <string.h>
#include "gnc-lot.h"
#include "gnc-lot-p.h"

#include "gnc-xml-helper.h"
#include "sixtp.h"
#include "sixtp-utils.h"
#include "sixtp-parsers.h"
#include "sixtp-utils.h"
#include "sixtp-dom-parsers.h"
#include "sixtp-dom-generators.h"

#include "gnc-xml.h"
#include "io-gncxml-gen.h"
#include "io-gncxml-v2.h"
#include "sixtp-dom-parsers.h"

static QofLogModule log_module = GNC_MOD_IO;

const gchar* lot_version_string = "2.0.0";

/* ids */
#define gnc_lot_string "gnc:lot"
#define lot_id_string "lot:id"
#define lot_slots_string "lot:slots"

xmlNodePtr
gnc_lot_dom_tree_create (GNCLot* lot)
{
    xmlNodePtr ret;

    ENTER ("(lot=%p)", lot);
    ret = xmlNewNode (NULL, BAD_CAST gnc_lot_string);
    xmlSetProp (ret, BAD_CAST "version", BAD_CAST lot_version_string);

    xmlAddChild (ret, guid_to_dom_tree (lot_id_string, gnc_lot_get_guid (lot)));
    /* xmlAddChild won't do anything with a NULL, so tests are superfluous. */
    xmlAddChild (ret, qof_instance_slots_to_dom_tree (lot_slots_string,
                                                      QOF_INSTANCE (lot)));

    LEAVE ("");
    return ret;
}

/* =================================================================== */

struct lot_pdata
{
    GNCLot*  lot;
    QofBook* book;
};

static gboolean
lot_id_handler (xmlNodePtr node, gpointer p)
{
    struct lot_pdata* pdata = static_cast<decltype (pdata)> (p);
    GncGUID* guid;

    ENTER ("(lot=%p)", pdata->lot);
    guid = dom_tree_to_guid (node);
    gnc_lot_set_guid (pdata->lot, *guid);

    guid_free (guid);

    LEAVE ("");
    return TRUE;
}

static gboolean
lot_slots_handler (xmlNodePtr node, gpointer p)
{
    struct lot_pdata* pdata = static_cast<decltype (pdata)> (p);
    gboolean success;

    ENTER ("(lot=%p)", pdata->lot);
    success = dom_tree_create_instance_slots (node, QOF_INSTANCE (pdata->lot));

    LEAVE ("");
    g_return_val_if_fail (success, FALSE);
    return TRUE;
}


static struct dom_tree_handler lot_handlers_v2[] =
{
    { lot_id_string, lot_id_handler, 1, 0 },
    { lot_slots_string, lot_slots_handler, 0, 0 },
    { NULL, 0, 0, 0 }
};

static gboolean
gnc_lot_end_handler (gpointer data_for_children,
                     GSList* data_from_children, GSList* sibling_data,
                     gpointer parent_data, gpointer global_data,
                     gpointer* result, const gchar* tag)
{
    GNCLot* lot;
    xmlNodePtr tree = (xmlNodePtr)data_for_children;
    gxpf_data* gdata = (gxpf_data*)global_data;
    QofBook* book = static_cast<decltype (book)> (gdata->bookdata);

    if (parent_data)
    {
        return TRUE;
    }

    /* OK.  For some messed up reason this is getting called again with a
       NULL tag.  So we ignore those cases */
    if (!tag)
    {
        return TRUE;
    }

    g_return_val_if_fail (tree, FALSE);

    lot = dom_tree_to_lot (tree, book);
    ENTER ("(lot=%p)", lot);
    if (lot != NULL)
    {
        gdata->cb (tag, gdata->parsedata, lot);
    }

    xmlFreeNode (tree);

    LEAVE ("");
    return lot != NULL;
}

GNCLot*
dom_tree_to_lot (xmlNodePtr node, QofBook* book)
{
    struct lot_pdata pdata;
    GNCLot* lot;
    gboolean successful;

    lot = gnc_lot_new (book);
    ENTER ("(lot=%p)", lot);

    pdata.lot = lot;
    pdata.book = book;

    successful = dom_tree_generic_parse (node, lot_handlers_v2,
                                         &pdata);
    if (!successful)
    {
        PERR ("failed to parse lot");
        gnc_lot_destroy (lot);
        lot = NULL;
    }

    LEAVE ("");
    return lot;
}

sixtp*
gnc_lot_sixtp_parser_create (void)
{
    return sixtp_dom_parser_new (gnc_lot_end_handler, NULL, NULL);
}

/* ================== END OF FILE ========================== */