'
',
);
static function setup() {
if ( !is_admin() )
return;
$new_fields = apply_filters( 'borax_nav_menu_item_additional_fields', array() );
if ( empty($new_fields) )
return;
self::$options['fields'] = self::get_fields_schema( $new_fields );
add_filter( 'wp_edit_nav_menu_walker', function () {
return 'Borax_Walker_Nav_Menu_Edit';
});
add_action( 'save_post', array( __CLASS__, '_save_post' ), 10, 2 );
}
static function get_fields_schema( $new_fields ) {
$schema = array();
foreach( $new_fields as $name => $field) {
if (empty($field['name'])) {
$field['name'] = $name;
}
$schema[] = $field;
}
return $schema;
}
static function get_menu_item_postmeta_key($name) {
return '_menu_item_' . $name;
}
/**
* Inject the
* @hook {action} save_post
*/
static function get_field( $item, $depth, $args ) {
$new_fields = '';
foreach( self::$options['fields'] as $field ) {
$field['value'] = get_post_meta($item->ID, self::get_menu_item_postmeta_key($field['name']), true);
$field['id'] = $item->ID;
$new_fields .= str_replace(
array_map(function($key){ return '{' . $key . '}'; }, array_keys($field)),
array_values(array_map('esc_attr', $field)),
self::$options['item_tpl']
);
}
return $new_fields;
}
/**
* Save the newly submitted fields
* @hook {action} save_post
*/
static function _save_post($post_id, $post) {
if ( $post->post_type !== 'nav_menu_item' ) {
return $post_id; // prevent weird things from happening
}
foreach( self::$options['fields'] as $field_schema ) {
$form_field_name = 'menu-item-' . $field_schema['name'];
// @todo FALSE should always be used as the default $value, otherwise we wouldn't be able to clear checkboxes
if (isset($_POST[$form_field_name][$post_id])) {
$key = self::get_menu_item_postmeta_key($field_schema['name']);
$value = stripslashes($_POST[$form_field_name][$post_id]);
update_post_meta($post_id, $key, $value);
}
}
}
}
// @todo This class needs to be in it's own file so we can include id J.I.T.
// requiring the nav-menu.php file on every page load is not so wise
require_once ABSPATH . 'wp-admin/includes/nav-menu.php';
class Borax_Walker_Nav_Menu_Edit extends Walker_Nav_Menu_Edit {
function start_el(&$output, $item, $depth=0, $args=array(), $id=0) {
$item_output = '';
parent::start_el($item_output, $item, $depth, $args, $id);
// Inject $new_fields before: