/**
* Update or add meta data for an image
*
* @since 1.4.0
* @param int $id The image ID
* @param array $values An array with existing or new values
* @return bool result of query
*/
static function update_image_meta($id, $new_values)
{
global $wpdb;
// XXX nggdb is used statically, cannot inherit from Ngg_Serializable
$serializer = new Ngg_Serializable();
// Query database for existing values
// Use cache object
$old_values = $wpdb->get_var($wpdb->prepare("SELECT meta_data FROM {$wpdb->nggpictures} WHERE pid = %d ", $id));
$old_values = $serializer->unserialize($old_values);
$meta = array_merge((array) $old_values, (array) $new_values);
$meta = $serializer->serialize($meta);
$result = $wpdb->query($wpdb->prepare("UPDATE {$wpdb->nggpictures} SET meta_data = %s WHERE pid = %d", $meta, $id));
wp_cache_delete($id, 'ngg_image');
return $result;
}
