283 lines
7.7 KiB
PHP
283 lines
7.7 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 Navigation 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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return is_nav_menu( $menu );
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}
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/**
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* Check if navigation menu exists.
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*
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* Returns the menu object, or false if the term doesn't exist.
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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 mixed Menu Object, if it exists. Else, false or WP_Error
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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 = 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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* 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( __('A menu named <strong>%s</strong> already exists; please try another name.'), esc_html( $menu_exists->name ) ) );
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if ( isset($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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* 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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* 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( 'orderby' => 'menu_order', 'post_type' => 'nav_menu_item', 'post_status' => 'publish', 'output' => ARRAY_A, 'output_key' => 'menu_order' );
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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 ( ARRAY_A == $args['output'] ) {
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$output = array();
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foreach ( $items as $item ) {
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$output[$item->$args['output_key']] = $item;
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}
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unset( $items );
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ksort( $output );
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return $output;
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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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* Retrieve the HTML list content for nav menu items.
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*
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* @uses Walker_Nav_Menu to create HTML list content.
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* @since 2.1.0
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* @see Walker::walk() for parameters and return description.
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*/
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function walk_nav_menu_tree( $items, $depth, $r ) {
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$walker = ( empty($r->walker) ) ? new Walker_Nav_Menu : $r->walker;
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$args = array( $items, $depth, $r );
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return call_user_func_array(array(&$walker, 'walk'), $args);
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}
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/**
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* Adds all the navigation menu properties to the menu item.
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*
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* @since 3.0.0
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*
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* @param string $menu_item The menu item to modify
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* @param string $menu_item_type The menu item type (frontend, custom, post_type, taxonomy).
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* @param string $menu_item_object Optional. The menu item object type (post type or taxonomy).
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* @return object $menu_item The modified menu item.
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*/
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function wp_setup_nav_menu_item( $menu_item, $menu_item_type = null, $menu_item_object = '' ) {
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switch ( $menu_item_type ) {
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case 'frontend':
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$menu_item->db_id = (int) $menu_item->ID;
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$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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} elseif ( 'taxonomy' == $menu_item->type ) {
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$object = get_taxonomy( $menu_item->object );
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$menu_item->append = $object->singular_label;
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} else {
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$menu_item->append = __('Custom');
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}
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$menu_item->title = $menu_item->post_title;
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$menu_item->url = get_post_meta( $menu_item->ID, '_menu_item_url', true );
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$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( $menu_item->ID, '_menu_item_xfn', true );
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break;
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case 'custom':
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$menu_item->db_id = 0;
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$menu_item->object_id = (int) $menu_item->ID;
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$menu_item->object = 'custom';
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$menu_item->type = 'custom';
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$menu_item->append = __('custom');
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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->title = $menu_item->post_title;
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$menu_item->url = get_post_meta( $menu_item->ID, '_menu_item_url', true );
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$menu_item->target = get_post_meta( $menu_item->ID, '_menu_item_target', true );
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$menu_item->classes = '';
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$menu_item->xfn = '';
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break;
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case 'post_type':
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$menu_item->db_id = 0;
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$menu_item->object_id = (int) $menu_item->ID;
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$menu_item->type = $menu_item_type;
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$object = get_post_type_object( $menu_item_object );
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$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 = '_self';
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$menu_item->attr_title = '';
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$menu_item->description = strip_tags( $menu_item->post_content );
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$menu_item->classes = '';
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$menu_item->xfn = '';
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break;
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case 'taxonomy':
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$menu_item->ID = $menu_item->term_id;
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$menu_item->db_id = 0;
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$menu_item->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 = $menu_item_type;
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$object = get_taxonomy( $menu_item_object );
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$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, $menu_item_object );
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$menu_item->target = '_self';
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$menu_item->attr_title = '';
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$menu_item->description = strip_tags( $menu_item->description );
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$menu_item->classes = '';
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$menu_item->xfn = '';
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break;
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}
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return $menu_item;
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}
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?>
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