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/*
* Copyright © 2010 Codethink Limited
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the licence, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
* Author: Ryan Lortie <desrt@desrt.ca>
*/
#include "dconf-rebuilder.h"
#include <string.h>
#include "../gvdb/gvdb-reader.h"
#include "../gvdb/gvdb-builder.h"
#include "../common/dconf-paths.h"
static GvdbItem *
dconf_rebuilder_get_parent (GHashTable *table,
const gchar *key)
{
GvdbItem *grandparent, *parent;
gchar *parent_name;
gint len;
if (g_str_equal (key, "/"))
return NULL;
len = strlen (key);
if (key[len - 1] == '/')
len--;
while (key[len - 1] != '/')
len--;
parent_name = g_strndup (key, len);
parent = g_hash_table_lookup (table, parent_name);
if (parent == NULL)
{
parent = gvdb_hash_table_insert (table, parent_name);
grandparent = dconf_rebuilder_get_parent (table, parent_name);
if (grandparent != NULL)
gvdb_item_set_parent (parent, grandparent);
}
return parent;
}
gboolean
dconf_rebuilder_rebuild (const gchar *filename,
const gchar *prefix,
const gchar * const *keys,
GVariant * const *values,
int n_items,
GError **error)
{
GHashTable *table;
gboolean success;
GHashTable *new;
GvdbTable *old;
gint i;
table = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, (GDestroyNotify) g_variant_unref);
/* read in the old values */
if ((old = gvdb_table_new (filename, FALSE, NULL)))
{
gchar **names;
gint n_names;
gint i;
names = gvdb_table_get_names (old, &n_names);
for (i = 0; i < n_names; i++)
{
if (dconf_is_key (names[i], NULL))
{
GVariant *value;
value = gvdb_table_get_value (old, names[i]);
if (value != NULL)
{
g_hash_table_insert (table, names[i], value);
names[i] = NULL;
}
}
g_free (names[i]);
}
gvdb_table_unref (old);
g_free (names);
}
/* apply the requested changes */
for (i = 0; i < n_items; i++)
{
gchar *path = g_strconcat (prefix, keys[i], NULL);
/* Check if we are performing a path reset */
if (g_str_has_suffix (path, "/"))
{
GHashTableIter iter;
gpointer key;
g_assert (values[i] == NULL);
/* A path reset is really a request to delete all keys that
* has a name starting with the reset path.
*/
g_hash_table_iter_init (&iter, table);
while (g_hash_table_iter_next (&iter, &key, NULL))
if (g_str_has_prefix (key, path))
g_hash_table_iter_remove (&iter);
}
if (values[i] != NULL)
g_hash_table_insert (table, g_strdup (path), g_variant_ref (values[i]));
else
g_hash_table_remove (table, path);
g_free (path);
}
/* convert back to GVDB format */
{
GHashTableIter iter;
gpointer key, value;
new = gvdb_hash_table_new (NULL, NULL);
g_hash_table_iter_init (&iter, table);
while (g_hash_table_iter_next (&iter, &key, &value))
{
GvdbItem *item;
g_assert (g_hash_table_lookup (new, key) == NULL);
item = gvdb_hash_table_insert (new, key);
gvdb_item_set_parent (item, dconf_rebuilder_get_parent (new, key));
gvdb_item_set_value (item, value);
}
}
/* write the new file */
success = gvdb_table_write_contents (new, filename, FALSE, error);
/* clean up */
g_hash_table_unref (table);
g_hash_table_unref (new);
return success;
}
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