path: root/src/bookmarks/ephy-bookmarks-export.c

/*
 *  Copyright (C) 2003 Marco Pesenti Gritti
 *  Copyright (C) 2003 Christian Persch
 *
 *  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, 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.
 *
 *  $Id$
 */

#include "config.h"

#include "ephy-bookmarks-export.h"
#include "ephy-node-common.h"
#include "ephy-file-helpers.h"
#include "ephy-debug.h"

#include <libxml/tree.h>
#include <libxml/xmlwriter.h>
#include <libgnomevfs/gnome-vfs-uri.h>
#include <libgnomevfs/gnome-vfs-utils.h>

static int
write_topics_list (EphyNode *topics,
           EphyNode *bmk,
           xmlTextWriterPtr writer)
{
    GPtrArray *children;
    GList *keywords = NULL, *l;
    int i;
    int ret = 0;

    children = ephy_node_get_children (topics);
    for (i = 0; i < children->len; i++)
    {
        EphyNode *kid;
        EphyNodePriority priority;

        kid = g_ptr_array_index (children, i);

        priority = ephy_node_get_property_int (kid, EPHY_NODE_KEYWORD_PROP_PRIORITY);
        if (priority == -1) priority = EPHY_NODE_NORMAL_PRIORITY;

        if (priority == EPHY_NODE_NORMAL_PRIORITY &&
            ephy_node_has_child (kid, bmk))
        {
            keywords = g_list_prepend (keywords, kid);
        }
    }

    for (l = keywords; l != NULL; l = l->next)
    {
        EphyNode *node = l->data;
        const char *name;

        name = ephy_node_get_property_string
            (node, EPHY_NODE_KEYWORD_PROP_NAME);

        ret = xmlTextWriterWriteElementNS
            (writer, 
             (xmlChar *) "dc",
             (xmlChar *) "subject",
             NULL,
             (xmlChar *) name);
        if (ret < 0) break;
    }

    g_list_free (keywords);

    return ret >= 0 ? 0 : -1;
}

void
ephy_bookmarks_export_rdf (EphyBookmarks *bookmarks,
               const char *filename)
{
    EphyNode *bmks, *topics, *smart_bmks;
    xmlTextWriterPtr writer;
    char *tmp_file;
    GPtrArray *children;
    char *file_uri;
    int i, ret;

    LOG ("Exporting as RDF to %s", filename)

    START_PROFILER ("Exporting as RDF")

    tmp_file = g_strconcat (filename, ".tmp", NULL);

    /* FIXME: do we want to turn on compression here? */
    writer = xmlNewTextWriterFilename (tmp_file, 0);
    if (writer == NULL)
    {
        g_free (tmp_file);
        return;
    }

    ret = xmlTextWriterSetIndent (writer, 1);
    if (ret < 0) goto out;

    ret = xmlTextWriterSetIndentString (writer, (xmlChar *) "  ");
    if (ret < 0) goto out;
    
    ret = xmlTextWriterStartDocument (writer, "1.0", NULL, NULL);
    if (ret < 0) goto out;

    ret = xmlTextWriterStartElementNS
        (writer,
         (xmlChar *) "rdf",
         (xmlChar *) "RDF",
         (xmlChar *) "http://www.w3.org/1999/02/22-rdf-syntax-ns#");
    if (ret < 0) goto out;

    ret = xmlTextWriterWriteAttribute
        (writer,
         (xmlChar *) "xmlns",
         (xmlChar *) "http://purl.org/rss/1.0/");
    if (ret < 0) goto out;

    ret = xmlTextWriterWriteAttributeNS
        (writer, 
         (xmlChar *) "xmlns",
         (xmlChar *) "dc",
         NULL,
         (xmlChar *) "http://purl.org/dc/elements/1.1/");
    if (ret < 0) goto out;

    ret = xmlTextWriterWriteAttributeNS
        (writer,
         (xmlChar *) "xmlns",
         (xmlChar *) "ephy",
         NULL,
         (xmlChar *) "http://gnome.org/ns/epiphany#");
    if (ret < 0) goto out;

    ret = xmlTextWriterStartElement (writer, (xmlChar *) "channel");
    if (ret < 0) goto out;

    /* FIXME is this UTF-8 ? */
    file_uri = gnome_vfs_get_uri_from_local_path (filename);
    ret = xmlTextWriterWriteAttributeNS
        (writer,
         (xmlChar *) "rdf",
         (xmlChar *) "about",
         NULL,
         (xmlChar *) file_uri);
    g_free (file_uri);
    if (ret < 0) goto out;

    ret = xmlTextWriterWriteElement 
        (writer,
         (xmlChar *) "title",
         (xmlChar *) "Epiphany bookmarks");
    if (ret < 0) goto out;

    ret = xmlTextWriterWriteElement
        (writer,
         (xmlChar *) "link",
         (xmlChar *) "http://www.gnome.org/projects/epiphany/");
    if (ret < 0) goto out;

    ret = xmlTextWriterStartElement (writer, (xmlChar *) "items");
    if (ret < 0) goto out;

    ret = xmlTextWriterStartElementNS
        (writer,
         (xmlChar *) "rdf", 
         (xmlChar *) "Seq",
         NULL);
    if (ret < 0) goto out;

    bmks = ephy_bookmarks_get_bookmarks (bookmarks);
    topics = ephy_bookmarks_get_keywords (bookmarks);
    smart_bmks = ephy_bookmarks_get_smart_bookmarks (bookmarks);

    children = ephy_node_get_children (bmks);
    for (i=0; i < children->len; i++)
    {
        EphyNode *kid;
        const char *url;
        char *link = NULL;
        gboolean smart_url;

        kid = g_ptr_array_index (children, i);

        ret = xmlTextWriterStartElementNS
            (writer,
             (xmlChar *) "rdf",
             (xmlChar *) "li",
             NULL);
        if (ret < 0) break;

        smart_url = ephy_node_has_child (smart_bmks, kid);
        url = ephy_node_get_property_string
            (kid, EPHY_NODE_BMK_PROP_LOCATION);
        if (smart_url)
        {
            GnomeVFSURI *uri;

            uri = gnome_vfs_uri_new (url);

            if (uri)
            {
                link = g_strconcat (gnome_vfs_uri_get_scheme (uri),
                            "://",
                            gnome_vfs_uri_get_host_name (uri),
                            NULL);

                gnome_vfs_uri_unref (uri);
            }
        }

        ret = xmlTextWriterWriteAttributeNS
            (writer,
             (xmlChar *) "rdf",
             (xmlChar *) "resource",
             NULL,
             (xmlChar *) (link ? link : url));
        g_free (link);
        if (ret < 0) break;

        ret = xmlTextWriterEndElement (writer); /* rdf:li */
        if (ret < 0) break;
    }
    if (ret < 0) goto out;

    ret = xmlTextWriterEndElement (writer); /* rdf:Seq */
    if (ret < 0) goto out;

    ret = xmlTextWriterEndElement (writer); /* items */
    if (ret < 0) goto out;

    ret = xmlTextWriterEndElement (writer); /* channel */
    if (ret < 0) goto out;
    
    children = ephy_node_get_children (bmks);
    for (i=0; i < children->len; i++)
    {
        EphyNode *kid;
        const char *url, *title;
        char *link = NULL;
        gboolean smart_url;

        kid = g_ptr_array_index (children, i);

        smart_url = ephy_node_has_child (smart_bmks, kid);
        url = ephy_node_get_property_string
            (kid, EPHY_NODE_BMK_PROP_LOCATION);
        title = ephy_node_get_property_string
            (kid, EPHY_NODE_BMK_PROP_TITLE);

        if (smart_url)
        {
            GnomeVFSURI *uri;

            uri = gnome_vfs_uri_new (url);

            if (uri)
            {
                link = g_strconcat (gnome_vfs_uri_get_scheme (uri),
                            "://",
                            gnome_vfs_uri_get_host_name (uri),
                            NULL);

                gnome_vfs_uri_unref (uri);
            }
        }

        if (link == NULL)
        {
            link = g_strdup (url);
        }

        ret = xmlTextWriterStartElement (writer, (xmlChar *) "item");
        if (ret < 0) break;

        ret = xmlTextWriterWriteAttributeNS
            (writer,
             (xmlChar *) "rdf",
             (xmlChar *) "about",
             NULL,
             (xmlChar *) link);
        if (ret < 0) break;

        ret = xmlTextWriterWriteElement
            (writer,
             (xmlChar *) "title",
             (xmlChar *) title);
        if (ret < 0) break;

        ret = xmlTextWriterWriteElement
            (writer,
             (xmlChar *) "link",
             (xmlChar *) link);
        if (ret < 0) break;

        if (smart_url)
        {
            ret = xmlTextWriterWriteElementNS
                (writer,
                 (xmlChar *) "ephy",
                 (xmlChar *) "smartlink",
                 NULL,
                 (xmlChar *) url);
            if (ret < 0) break;
        }

        ret = write_topics_list (topics, kid, writer);
        if (ret < 0) break;

        ret = xmlTextWriterEndElement (writer); /* item */

        g_free (link);
    }
    if (ret < 0) goto out;

    ret = xmlTextWriterEndElement (writer); /* rdf:RDF */
    if (ret < 0) goto out;

    ret = xmlTextWriterEndDocument (writer);

out:
    xmlFreeTextWriter (writer);

    if (ret >= 0)
    {
        if (ephy_file_switch_temp_file (filename, tmp_file) == FALSE)
        {
            ret = -1;
        }
    }

    g_free (tmp_file);

    STOP_PROFILER ("Exporting as RDF")

    LOG ("Exporting as RDF %s.", ret >= 0 ? "succeeded" : "FAILED")
}