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auto-subpage-menu.php
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auto-subpage-menu.php
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<?php
/*
Plugin Name: Auto Subpage Menu
Plugin URI: https://wordpress.org/plugins/auto-subpage-menu/
Description: Automatically add child page (subpage) into menus, also update hierarchy / remove / restore subpage on menu for you.
Version: 1.1.5
Author: Nathachai Thongniran
Author URI: http://jojoee.com/
Text Domain: asm
License: GPLv2
*/
class Auto_Subpage_Menu {
function __construct() {
add_action( 'post_updated', array( &$this, 'when_update_page' ), 10, 4 );
add_action( 'wp_trash_post', '_wp_delete_post_menu_item' );
}
function dd( $var, $die = true ) {
echo '<pre>';
print_r( $var );
echo '</pre>';
if ( $die ) { die(); }
}
function da( $var ) {
$this->dd( $var, false );
}
function is_restore( $page_after_status, $page_before_status ) {
if ( ( $page_after_status === 'publish' ) &&
( $page_before_status === 'trash' ) ) {
return true;
}
return false;
}
function is_parent_change( $page_parent_after, $page_parent_before ) {
if ( $page_parent_after !== $page_parent_before ) {
return true;
}
return false;
}
/**
* Check the theme, support menu or not
*
* @see https://codex.wordpress.org/Function_Reference/current_theme_supports
*
* @return boolean
*/
function is_support_menus() {
if ( ! current_theme_supports( 'menus' ) ) {
return false;
}
return true;
}
/**
* Check the page, has page parent or not
*
* @param integer $page_id
* @return boolean
*/
function has_parent( $page_id ) {
$post = get_post( $page_id );
if ( ! $post->post_parent ) {
return false;
}
return true;
}
/**
* Check menus, set `Automatically add new top-level pages to this menu` (auto_add) or not
*
* @see https://codex.wordpress.org/Appearance_Menus_Screen
*
* @return boolean
*/
function has_auto_add() {
$auto_add = get_option( 'nav_menu_options' );
if ( ! is_array( $auto_add ) || empty( $auto_add ) ||
! isset( $auto_add['auto_add'] ) || ! is_array( $auto_add['auto_add'] ) || empty( $auto_add['auto_add'] ) ) {
return false;
}
return true;
}
function get_auto_add() {
$auto_add = get_option( 'nav_menu_options' );
return $auto_add['auto_add'];
}
function remove_page_from_menu( $object_id ) {
global $wpdb,
$table_prefix;
$query = sprintf( 'DELETE FROM %s_term_relationships WHERE object_id = %d',
$table_prefix,
$object_id
);
$wpdb->get_results( $query, OBJECT );
}
function remove_page_from_menus( $menu_ids, $page ) {
foreach ( $menu_ids as $menu_id ) {
$menu_items = wp_get_nav_menu_items( $menu_id, array( 'post_status' => 'publish' ) );
if ( ! is_array( $menu_items ) ) {
continue;
} else {
foreach ( $menu_items as $menu_item ) {
// if page's existed in menu, then remove it from menu
if ( $menu_item->object_id == $page->ID ) { $this->remove_page_from_menu( $menu_item->ID ); }
}
}
}
}
function add_page_into_menu( $menu_id, $page_id, $post_type, $page_parent_id = 0 ) {
wp_update_nav_menu_item( $menu_id, 0, array(
'menu-item-object-id' => $page_id,
'menu-item-object' => $post_type,
'menu-item-parent-id' => $page_parent_id,
'menu-item-type' => 'post_type',
'menu-item-status' => 'publish'
) );
}
function add_page_into_submenu( $menu_id, $page, $page_parent ) {
$this->add_page_into_menu( $menu_id, $page->ID, $page->post_type, $page_parent->ID );
}
function add_page_into_topmenu( $menu_id, $page ) {
$this->add_page_into_menu( $menu_id, $page->ID, $page->post_type, 0 );
}
function update_submenu( $menu_ids, $page ) {
// loop through each menu
foreach ( $menu_ids as $menu_id ) {
$page_parent = null;
$menu_items = wp_get_nav_menu_items( $menu_id, array( 'post_status' => 'publish' ) );
if ( ! is_array( $menu_items ) ) {
continue;
} else {
// loop through each menu item
foreach ( $menu_items as $menu_item ) {
// if page's existed in this menu, then ignore
if ( $menu_item->object_id == $page->ID ) {
continue;
}
// if page parent's existed in this menu, then get this menu item
if ( $menu_item->object_id == $page->post_parent ) {
$page_parent = $menu_item;
}
}
}
// if page has parent page, then add page into sub-menu under page parent
if ( ! is_null( $page_parent ) ) {
$this->add_page_into_submenu( $menu_id, $page, $page_parent );
}
}
}
function update_topmenu( $menu_ids, $page ) {
foreach ( $menu_ids as $menu_id ) {
$this->add_page_into_topmenu( $menu_id, $page );
}
}
function when_update_page( $page_id, $page_after, $page_before ) {
// if support menu and has auto_add
if ( $this->is_support_menus() && $this->has_auto_add() ) {
$page = $page_after;
$menu_ids = $this->get_auto_add();
$is_restore = $this->is_restore( $page_after->post_status, $page_before->post_status );
$is_parent_change = $this->is_parent_change( $page_after->post_parent, $page_before->post_parent);
// if it's restored or its page parent's changed
if ( $is_restore || $is_parent_change ) {
$this->remove_page_from_menus( $menu_ids, $page );
if ( $this->has_parent( $page_id ) ) {
$this->update_submenu( $menu_ids, $page );
} else {
$this->update_topmenu( $menu_ids, $page );
}
}
}
}
}
$auto_subpage_menu = new Auto_Subpage_Menu();