666 lines
20 KiB
PHP
666 lines
20 KiB
PHP
<?php
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/**
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* Navigation Menu functions
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*
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* @package WordPress
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* @subpackage Nav_Menus
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* @since 3.0.0
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*/
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/**
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* Returns a navigation menu object.
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*
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* @since 3.0.0
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*
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* @param string $menu Menu id
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* @return mixed $menu|false Or WP_Error
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*/
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function wp_get_nav_menu_object( $menu ) {
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if ( ! $menu )
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return false;
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$menu_obj = get_term( $menu, 'nav_menu' );
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if ( ! $menu_obj )
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$menu_obj = get_term_by( 'slug', $menu, 'nav_menu' );
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if ( ! $menu_obj )
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$menu_obj = get_term_by( 'name', $menu, 'nav_menu' );
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if ( ! $menu_obj ) {
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$menu_obj = false;
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}
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return $menu_obj;
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}
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/**
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* Check if the given ID is a nav menu.
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*
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* Returns true if it is; false otherwise.
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*
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* @since 3.0.0
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*
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* @param int|string $menu The menu to check
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* @return bool Whether the menu exists.
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*/
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function is_nav_menu( $menu ) {
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if ( ! $menu )
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return false;
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$menu_obj = wp_get_nav_menu_object( $menu );
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if (
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$menu_obj &&
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! is_wp_error( $menu_obj ) &&
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! empty( $menu_obj->taxonomy ) &&
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'nav_menu' == $menu_obj->taxonomy
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)
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return true;
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return false;
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}
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/**
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* Determine whether the given ID is a nav menu item.
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*
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* @since 3.0.0
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*
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* @param int $menu_item_id The ID of the potential nav menu item.
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* @return bool Whether the given ID is that of a nav menu item.
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*/
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function is_nav_menu_item( $menu_item_id = 0 ) {
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return ( ! is_wp_error( $menu_item_id ) && ( 'nav_menu_item' == get_post_type( $menu_item_id ) ) );
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}
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/**
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* Create a Navigation Menu.
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*
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* Optional args:
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* slug - the url friendly version of the nav menu.
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*
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* @since 3.0.0
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*
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* @param string $menu_name Menu Name
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* @param string $args Optional.
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* @return mixed Menu object on sucess|WP_Error on failure
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*/
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function wp_create_nav_menu( $menu_name, $args = array() ) {
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$menu_exists = get_term_by( 'name', $menu_name, 'nav_menu' );
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if ( $menu_exists )
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return new WP_Error( 'menu_exists', sprintf( __('The menu name <strong>%s</strong> conflicts with another menu name. Please try another.'), esc_html( $menu_name ) ) );
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if ( isset($args['slug']) )
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$slug = $args['slug'];
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else
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$slug = $menu_name;
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$menu = wp_insert_term( $menu_name, 'nav_menu', array('slug' => $slug) );
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if ( is_wp_error($menu) )
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return $menu;
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$result = get_term( $menu['term_id'], 'nav_menu' );
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if ( $result && !is_wp_error($result) ) {
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do_action( 'wp_create_nav_menu', $menu['term_id'] );
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return $result;
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} else {
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return $result;
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}
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}
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/**
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* Delete a Navigation Menu.
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*
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* @since 3.0.0
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*
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* @param string $menu name|id|slug
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* @return mixed Menu object on sucess|WP_Error on failure
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*/
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function wp_delete_nav_menu( $menu ) {
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$menu = wp_get_nav_menu_object( $menu );
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if ( ! $menu )
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return false;
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$menu_objects = get_objects_in_term( $menu->term_id, 'nav_menu' );
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if ( !empty( $menu_objects ) ) {
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foreach ( $menu_objects as $item ) {
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wp_delete_post( $item );
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}
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}
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$result = wp_delete_term( $menu->term_id, 'nav_menu' );
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if ( $result && !is_wp_error($result) ) {
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do_action( 'wp_delete_nav_menu', $menu->term_id );
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return $result;
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} else {
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return $result;
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}
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}
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/**
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* Save the properties of a menu or create a new menu with those properties.
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*
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* @since 3.0.0
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*
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* @param int $menu_id The ID of the menu
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* @param array $menu_data The array of menu data.
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* @return int|error object The menu's ID or WP_Error object.
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*/
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function wp_update_nav_menu_object( $menu_id = 0, $menu_data = array() ) {
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$menu_id = (int) $menu_id;
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$_menu = wp_get_nav_menu_object( $menu_id );
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// menu doesn't already exist
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if ( ! $_menu || is_wp_error( $_menu ) )
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$_menu = wp_create_nav_menu( $menu_data['menu-name'] );
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if ( is_wp_error( $_menu ) )
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return $_menu;
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if ( $_menu && isset( $_menu->term_id ) ) {
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$args = array(
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'description' => ( isset( $menu_data['description'] ) ? $menu_data['description'] : '' ),
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'name' => ( isset( $menu_data['menu-name'] ) ? $menu_data['menu-name'] : '' ),
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'parent' => ( isset( $menu_data['parent'] ) ? (int) $menu_data['parent'] : 0 ),
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'slug' => null,
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);
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$menu_id = (int) $_menu->term_id;
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// double-check that we're not changing a menu to the name of another
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$_possible_existing = get_term_by( 'name', $menu_data['menu-name'], 'nav_menu' );
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if (
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$_possible_existing &&
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! is_wp_error( $_possible_existing ) &&
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isset( $_possible_existing->term_id ) &&
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$_possible_existing->term_id != $menu_id
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) {
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return new WP_Error( 'menu_exists', sprintf( __('The menu name <strong>%s</strong> conflicts with another menu name. Please try another.'), esc_html( $menu_data['menu-name'] ) ) );
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}
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$update_response = wp_update_term( $menu_id, 'nav_menu', $args );
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if ( ! is_wp_error( $update_response ) )
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return $menu_id;
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else
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return $update_response;
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} else {
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return 0;
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}
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}
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/**
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* Save the properties of a menu item or create a new one.
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*
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* @since 3.0.0
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*
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* @param int $menu_id The ID of the menu. Required.
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* @param int $menu_item_db_id The ID of the menu item. If "0", creates a new menu item.
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* @param array $menu_item_data The menu item's data.
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* @return int The menu item's database ID or WP_Error object on failure.
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*/
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function wp_update_nav_menu_item( $menu_id = 0, $menu_item_db_id = 0, $menu_item_data = array() ) {
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$menu_id = (int) $menu_id;
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$menu_item_db_id = (int) $menu_item_db_id;
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// make sure that we don't convert non-nav_menu_item objects into nav_menu_item objects
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if ( ! empty( $menu_item_db_id ) && ! is_nav_menu_item( $menu_item_db_id ) ) {
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return new WP_Error('update_nav_menu_item_failed', __('The given object ID is not that of a menu item.'));
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}
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$menu = wp_get_nav_menu_object( $menu_id );
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if ( ! $menu || is_wp_error( $menu ) ) {
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return $menu;
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}
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$menu_items = (array) wp_get_nav_menu_items( $menu_id );
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$count = count( $menu_items );
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$defaults = array(
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'menu-item-db-id' => $menu_item_db_id,
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'menu-item-object-id' => 0,
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'menu-item-object' => '',
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'menu-item-parent-id' => 0,
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'menu-item-position' => 0,
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'menu-item-type' => 'custom',
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'menu-item-append' => 'custom',
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'menu-item-title' => '',
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'menu-item-url' => '',
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'menu-item-description' => '',
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'menu-item-attr-title' => '',
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'menu-item-target' => '',
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'menu-item-classes' => '',
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'menu-item-xfn' => '',
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);
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$args = wp_parse_args( $menu_item_data, $defaults );
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if ( 0 == (int) $args['menu-item-position'] ) {
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$last_item = array_pop( $menu_items );
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if ( $last_item && isset( $last_item->ID ) ) {
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$last_data = get_post( $last_item->ID );
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if ( ! is_wp_error( $last_data ) && isset( $last_data->menu_order ) ) {
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$args['menu-item-position'] = 1 + (int) $last_data->menu_order;
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}
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} else {
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$args['menu-item-position'] = $count;
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}
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}
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$original_parent = 0 < $menu_item_db_id ? get_post_field( 'post_parent', $menu_item_db_id ) : 0;
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if ( 'custom' != $args['menu-item-type'] ) {
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/* if non-custom menu item, then:
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* use original object's URL
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* blank default title to sync with original object's
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*/
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$args['menu-item-url'] = '';
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$original_title = '';
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if ( 'taxonomy' == $args['menu-item-type'] ) {
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$original_parent = get_term_field( 'parent', $args['menu-item-object-id'], $args['menu-item-object'], 'raw' );
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$original_title = get_term_field( 'name', $args['menu-item-object-id'], $args['menu-item-object'], 'raw' );
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} elseif ( 'post_type' == $args['menu-item-type'] ) {
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$original_object = get_post( $args['menu-item-object-id'] );
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$original_parent = (int) $original_object->post_parent;
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$original_title = $original_object->post_title;
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if ( 'trash' == get_post_status( $args['menu-item-object-id'] ) ) {
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$post_type_object = get_post_type_object( $args['menu-item-object'] );
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if ( isset( $post_type_object->singular_label ) )
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return new WP_Error('update_nav_menu_item_failed', sprintf(__('The menu item "%1$s" belongs to a %2$s that is in the trash, so it cannot be updated.'), $args['menu-item-title'], $post_type_object->singular_label ) );
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else
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return new WP_Error('update_nav_menu_item_failed', sprintf(__('The menu item "%1$s" belongs to something that is in the trash, so it cannot be updated.'), $args['menu-item-title'] ) );
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}
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}
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if ( empty( $args['menu-item-title'] ) || $args['menu-item-title'] == $original_title ) {
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$args['menu-item-title'] = '';
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// hack to get wp to create a post object when too many properties are empty
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if ( empty( $args['menu-item-description'] ) ) {
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$args['menu-item-description'] = ' ';
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}
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}
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}
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// Populate the menu item object
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$post = array(
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'menu_order' => $args['menu-item-position'],
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'ping_status' => 0,
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'post_content' => $args['menu-item-description'],
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'post_excerpt' => $args['menu-item-attr-title'],
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'post_parent' => $original_parent,
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'post_title' => $args['menu-item-title'],
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'post_type' => 'nav_menu_item',
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'tax_input' => array( 'nav_menu' => $menu->name ),
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);
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// New menu item
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if ( 0 == $menu_item_db_id ) {
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$post['ID'] = 0;
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$post['post_status'] = 'draft';
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$menu_item_db_id = wp_insert_post( $post );
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// Update existing menu item
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} else {
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$post['ID'] = $menu_item_db_id;
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$post['post_status'] = 'publish';
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wp_update_post( $post );
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}
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if ( 'custom' == $args['menu-item-type'] ) {
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$args['menu-item-object-id'] = $menu_item_db_id;
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$args['menu-item-object'] = 'custom';
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}
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if ( $menu_item_db_id && ! is_wp_error( $menu_item_db_id ) ) {
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$menu_item_db_id = (int) $menu_item_db_id;
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update_post_meta( $menu_item_db_id, '_menu_item_type', sanitize_key($args['menu-item-type']) );
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update_post_meta( $menu_item_db_id, '_menu_item_menu_item_parent', (int) $args['menu-item-parent-id'] );
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update_post_meta( $menu_item_db_id, '_menu_item_object_id', (int) $args['menu-item-object-id'] );
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update_post_meta( $menu_item_db_id, '_menu_item_object', sanitize_key($args['menu-item-object']) );
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update_post_meta( $menu_item_db_id, '_menu_item_target', sanitize_key($args['menu-item-target']) );
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// @todo handle sanitizing multiple classes separated by whitespace.
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update_post_meta( $menu_item_db_id, '_menu_item_classes', sanitize_html_class($args['menu-item-classes']) );
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update_post_meta( $menu_item_db_id, '_menu_item_xfn', sanitize_html_class($args['menu-item-xfn']) );
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// @todo: only save custom link urls.
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update_post_meta( $menu_item_db_id, '_menu_item_url', esc_url_raw($args['menu-item-url']) );
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do_action('wp_update_nav_menu_item', $menu_id, $menu_item_db_id, $args );
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}
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return $menu_item_db_id;
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}
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/**
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* Returns all navigation menu objects.
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*
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* @since 3.0.0
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*
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* @return array menu objects
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*/
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function wp_get_nav_menus() {
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return get_terms( 'nav_menu', array( 'hide_empty' => false, 'orderby' => 'id' ) );
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}
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/**
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* Sort menu items by the desired key.
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*
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* @since 3.0.0
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* @access private
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*
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* @param object $a The first object to compare
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* @param object $b The second object to compare
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* @return int -1, 0, or 1 if $a is considered to be respectively less than, equal to, or greater than $b.
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*/
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function _sort_nav_menu_items($a, $b) {
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global $_menu_item_sort_prop;
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if ( empty( $_menu_item_sort_prop ) ) {
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return 0;
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}
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if ( isset( $a->$_menu_item_sort_prop ) && isset( $b->$_menu_item_sort_prop ) ) {
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$_a = (int) $a->$_menu_item_sort_prop;
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$_b = (int) $b->$_menu_item_sort_prop;
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if ( $a->$_menu_item_sort_prop == $b->$_menu_item_sort_prop ) {
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return 0;
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} elseif (
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( $_a == $a->$_menu_item_sort_prop ) &&
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( $_b == $b->$_menu_item_sort_prop )
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) {
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return $_a < $_b ? -1 : 1;
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} else {
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return strcmp( $a->$_menu_item_sort_prop, $b->$_menu_item_sort_prop );
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}
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} else {
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return 0;
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}
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}
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/**
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* Returns all menu items of a navigation menu.
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*
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* @since 3.0.0
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*
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* @param string $menu menu name, id, or slug
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* @param string $args
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* @return mixed $items array of menu items, else false.
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*/
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function wp_get_nav_menu_items( $menu, $args = array() ) {
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$menu = wp_get_nav_menu_object( $menu );
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if ( ! $menu )
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return false;
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$items = get_objects_in_term( $menu->term_id, 'nav_menu' );
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if ( ! empty( $items ) ) {
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$defaults = array( 'order' => 'ASC', 'orderby' => 'menu_order', 'post_type' => 'nav_menu_item', 'post_status' => 'publish', 'output' => ARRAY_A, 'output_key' => 'menu_order', 'nopaging' => true );
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$args = wp_parse_args( $args, $defaults );
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if ( count( $items ) > 1 )
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$args['include'] = implode( ',', $items );
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else
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$args['include'] = $items[0];
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$items = get_posts( $args );
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if ( is_wp_error( $items ) || ! is_array( $items ) ) {
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return false;
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}
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$items = array_map( 'wp_setup_nav_menu_item', $items );
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if ( ARRAY_A == $args['output'] ) {
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$GLOBALS['_menu_item_sort_prop'] = $args['output_key'];
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usort($items, '_sort_nav_menu_items');
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$i = 1;
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foreach( $items as $k => $item ) {
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$items[$k]->$args['output_key'] = $i++;
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}
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}
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}
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return $items;
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}
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/**
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* Decorates a menu item object with the shared navigation menu item properties.
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*
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* Properties:
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* - db_id: The DB ID of this item as a nav_menu_item object, if it exists (0 if it doesn't exist).
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* - object_id: The DB ID of the original object this menu item represents, e.g. ID for posts and term_id for categories.
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* - type: The family of objects originally represented, such as "post_type" or "taxonomy."
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* - object: The type of object originally represented, such as "category," "post", or "attachment."
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* - append: The singular label used to describe this type of menu item.
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* - post_parent: The DB ID of the original object's parent object, if any (0 otherwise).
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* - menu_item_parent: The DB ID of the nav_menu_item that is this item's menu parent, if any. 0 otherwise.
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* - url: The URL to which this menu item points.
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* - title: The title of this menu item.
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* - target: The target attribute of the link element for this menu item.
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* - attr_title: The title attribute of the link element for this menu item.
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* - classes: The class attribute value for the link element of this menu item.
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* - xfn: The XFN relationship expressed in the link of this menu item.
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* - description: The description of this menu item.
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*
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* @since 3.0.0
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*
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* @param object $menu_item The menu item to modify.
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* @return object $menu_item The menu item with standard menu item properties.
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*/
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function wp_setup_nav_menu_item( $menu_item ) {
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if ( isset( $menu_item->post_type ) ) {
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if ( 'nav_menu_item' == $menu_item->post_type ) {
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$menu_item->db_id = (int) $menu_item->ID;
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$menu_item->menu_item_parent = get_post_meta( $menu_item->ID, '_menu_item_menu_item_parent', true );
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$menu_item->object_id = get_post_meta( $menu_item->ID, '_menu_item_object_id', true );
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$menu_item->object = get_post_meta( $menu_item->ID, '_menu_item_object', true );
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$menu_item->type = get_post_meta( $menu_item->ID, '_menu_item_type', true );
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if ( 'post_type' == $menu_item->type ) {
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$object = get_post_type_object( $menu_item->object );
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$menu_item->append = $object->singular_label;
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$menu_item->url = get_permalink( $menu_item->object_id );
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$original_object = get_post( $menu_item->object_id );
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$original_title = $original_object->post_title;
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$menu_item->title = '' == $menu_item->post_title ? $original_title : $menu_item->post_title;
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} elseif ( 'taxonomy' == $menu_item->type ) {
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$object = get_taxonomy( $menu_item->object );
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$menu_item->append = $object->singular_label;
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$menu_item->url = get_term_link( (int) $menu_item->object_id, $menu_item->object );
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$original_title = get_term_field( 'name', $menu_item->object_id, $menu_item->object, 'raw' );
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$menu_item->title = '' == $menu_item->post_title ? $original_title : $menu_item->post_title;
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} else {
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$menu_item->append = __('Custom');
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$menu_item->title = $menu_item->post_title;
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$menu_item->url = get_post_meta( $menu_item->ID, '_menu_item_url', true );
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}
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$menu_item->target = get_post_meta( $menu_item->ID, '_menu_item_target', true );
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$menu_item->attr_title = strip_tags( $menu_item->post_excerpt );
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$menu_item->description = strip_tags( $menu_item->post_content );
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$menu_item->classes = get_post_meta( $menu_item->ID, '_menu_item_classes', true );
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$menu_item->xfn = get_post_meta( $menu_item->ID, '_menu_item_xfn', true );
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} else {
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$menu_item->db_id = 0;
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$menu_item->menu_item_parent = 0;
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$menu_item->object_id = (int) $menu_item->ID;
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$menu_item->type = 'post_type';
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$object = get_post_type_object( $menu_item->post_type );
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$menu_item->object = $object->name;
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$menu_item->append = strtolower( $object->singular_label );
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$menu_item->title = $menu_item->post_title;
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$menu_item->url = get_permalink( $menu_item->ID );
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$menu_item->target = '';
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$menu_item->attr_title = strip_tags( $menu_item->post_excerpt );
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$menu_item->description = strip_tags( $menu_item->post_content );
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$menu_item->classes = '';
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$menu_item->xfn = '';
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}
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} elseif ( isset( $menu_item->taxonomy ) ) {
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$menu_item->ID = $menu_item->term_id;
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$menu_item->db_id = 0;
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$menu_item->menu_item_parent = 0;
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$menu_item->object_id = (int) $menu_item->term_id;
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$menu_item->post_parent = (int) $menu_item->parent;
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$menu_item->type = 'taxonomy';
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$object = get_taxonomy( $menu_item->taxonomy );
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$menu_item->object = $object->name;
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$menu_item->append = strtolower( $object->singular_label );
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$menu_item->title = $menu_item->name;
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$menu_item->url = get_term_link( $menu_item, $menu_item->taxonomy );
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$menu_item->target = '';
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$menu_item->attr_title = '';
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$menu_item->description = strip_tags( get_term_field( 'description', $menu_item->term_id, $menu_item->taxonomy ) );
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$menu_item->classes = '';
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$menu_item->xfn = '';
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}
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return apply_filters( 'wp_setup_nav_menu_item', $menu_item );
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}
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/**
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* Get the menu items associated with a particular object.
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*
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* @since 3.0.0
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*
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* @param int $object_id The ID of the original object.
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* @param string $object_type The type of object, such as "taxonomy" or "post_type."
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* @return array The array of menu item IDs; empty array if none;
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*/
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function wp_get_associated_nav_menu_items( $object_id = 0, $object_type = 'post_type' ) {
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$object_id = (int) $object_id;
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$menu_item_ids = array();
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$query = new WP_Query;
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$menu_items = $query->query(
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array(
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'meta_key' => '_menu_item_object_id',
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'meta_value' => $object_id,
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'post_status' => 'any',
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'post_type' => 'nav_menu_item',
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'showposts' => -1,
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)
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);
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foreach( (array) $menu_items as $menu_item ) {
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if ( isset( $menu_item->ID ) && is_nav_menu_item( $menu_item->ID ) ) {
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if ( get_post_meta($menu_item->ID, '_menu_item_type', true) != $object_type )
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continue;
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$menu_item_ids[] = (int) $menu_item->ID;
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}
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}
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return array_unique( $menu_item_ids );
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}
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/**
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* Callback for handling a menu item when its original object is trashed.
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*
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* @since 3.0.0
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* @access private
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*
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* @param int $object_id The ID of the original object being trashed.
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*
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*/
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function _wp_trash_menu_item( $object_id = 0 ) {
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$object_id = (int) $object_id;
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$menu_item_ids = wp_get_associated_nav_menu_items( $object_id );
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foreach( (array) $menu_item_ids as $menu_item_id ) {
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$menu_item = get_post( $menu_item_id, ARRAY_A );
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$menu_item['post_status'] = 'draft';
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wp_insert_post($menu_item);
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}
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}
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/**
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* Callback for handling a menu item when its original object is un-trashed.
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*
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* @since 3.0.0
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* @access private
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*
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* @param int $object_id The ID of the original object being untrashed.
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*
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*/
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function _wp_untrash_menu_item( $object_id = 0 ) {
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$object_id = (int) $object_id;
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$menu_item_ids = wp_get_associated_nav_menu_items( $object_id );
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foreach( (array) $menu_item_ids as $menu_item_id ) {
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$menu_item = get_post( $menu_item_id, ARRAY_A );
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$menu_item['post_status'] = 'publish';
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wp_insert_post($menu_item);
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}
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}
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/**
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* Callback for handling a menu item when its original object is deleted.
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*
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* @since 3.0.0
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* @access private
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*
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* @param int $object_id The ID of the original object being trashed.
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*
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*/
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function _wp_delete_post_menu_item( $object_id = 0 ) {
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$object_id = (int) $object_id;
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$menu_item_ids = wp_get_associated_nav_menu_items( $object_id, 'post_type' );
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foreach( (array) $menu_item_ids as $menu_item_id ) {
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wp_delete_post( $menu_item_id, true );
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}
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}
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/**
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* Callback for handling a menu item when its original object is deleted.
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*
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* @since 3.0.0
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* @access private
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*
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* @param int $object_id The ID of the original object being trashed.
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*
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*/
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function _wp_delete_tax_menu_item( $object_id = 0 ) {
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$object_id = (int) $object_id;
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$menu_item_ids = wp_get_associated_nav_menu_items( $object_id, 'taxonomy' );
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foreach( (array) $menu_item_ids as $menu_item_id ) {
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wp_delete_post( $menu_item_id, true );
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}
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}
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?>
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