/**
* Peforms saving of `file` attachement's ID
* @since 1.1.0
* @param string $value File url
*/
public function _save_file_id($value)
{
$group = $this->field->group;
$args = $this->field->args();
$args['id'] = $args['_id'] . '_id';
unset($args['_id'], $args['_name']);
// And get new field object
$field = new cmb_Meta_Box_field($args, $group);
$id_key = $field->_id();
$id_val_old = $field->escaped_value('absint');
if ($group) {
// Check group $_POST data
$i = $group->index;
$base_id = $group->_id();
$id_val = isset($_POST[$base_id][$i][$id_key]) ? absint($_POST[$base_id][$i][$id_key]) : 0;
} else {
// Check standard $_POST data
$id_val = isset($_POST[$field->id()]) ? $_POST[$field->id()] : null;
}
// If there is no ID saved yet, try to get it from the url
if ($value && !$id_val) {
$id_val = cmb_Meta_Box::image_id_from_url($value);
}
if ($group) {
return array('attach_id' => $id_val, 'field_id' => $id_key);
}
if ($id_val && $id_val != $id_val_old) {
return $field->update_data($id_val);
} elseif (empty($id_val) && $id_val_old) {
return $field->remove_data($old);
}
}
