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mpress-menu-wormhole.php
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mpress-menu-wormhole.php
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<?php
/*
* Plugin Name: mPress Menu Wormhole
* Plugin URI: https://wpscholar.com/wordpress-plugins/mpress-menu-wormhole/
* Description: Easily add an existing menu within another WordPress menu.
* Author: Micah Wood
* Author URI: https://wpscholar.com
* Version: 1.1.2
* License: GPL3
* License URI: http://www.gnu.org/licenses/gpl-3.0.html
*
* Copyright 2013-2017 by Micah Wood - All rights reserved.
*/
if ( ! defined( 'MPRESS_MENU_WORMHOLE_URL' ) ) {
define( 'MPRESS_MENU_WORMHOLE_URL', plugins_url( '', __FILE__ ) );
}
/**
* Class mPress_Menu_Wormhole
*/
class mPress_Menu_Wormhole {
protected static $action = 'add_wormhole';
/**
* Initialize plugin
*/
public static function initialize() {
if ( is_admin() ) {
add_action( 'admin_init', array( __CLASS__, 'admin_init' ) );
add_action( 'wp_update_nav_menu_item', array( __CLASS__, 'wp_update_nav_menu_item' ), 10, 3 );
add_filter( 'wp_edit_nav_menu_walker', array( __CLASS__, 'wp_edit_nav_menu_walker' ) );
} else {
add_filter( 'walker_nav_menu_start_el', array( __CLASS__, 'walker_nav_menu_start_el' ), 10, 4 );
}
if ( defined( 'DOING_AJAX' ) && DOING_AJAX ) {
add_action( 'wp_ajax_' . self::$action, array( __CLASS__, 'do_ajax' ) );
}
}
/**
* Allow a small subset of HTML for menu item links.
*
* @return array
*/
public static function get_allowed_menu_link_html() {
return array(
'b' => array(),
'br' => array(),
'em' => array(),
'i' => array(
'class' => true,
),
'span' => array(
'class' => true,
),
'strong' => array(),
'sub' => array(),
'sup' => array(),
);
}
/**
* Add meta box and scripts on admin_init.
*/
public static function admin_init() {
global $pagenow;
if ( 'nav-menus.php' === $pagenow ) {
$title = __( 'Navigation Menus', 'mpress-menu-wormhole' );
add_meta_box( 'taxonomy-nav_menu', $title, array(
__CLASS__,
'render_metabox'
), 'nav-menus', 'side', 'low' );
add_action( 'admin_enqueue_scripts', array( __CLASS__, 'admin_enqueue_scripts' ) );
}
}
/**
* Render meta box displayed on the nav menu page.
*/
public static function render_metabox() {
include( dirname( __FILE__ ) . '/views/view-metabox.php' );
}
/**
* Register admin script and localize data
*/
public static function admin_enqueue_scripts() {
$prefix = defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ? '' : '.min';
wp_enqueue_script(
'mpress-menu-wormhole',
MPRESS_MENU_WORMHOLE_URL . "/js/jquery.wormhole{$prefix}.js",
array( 'jquery' )
);
wp_localize_script(
'mpress-menu-wormhole',
'mPressMenuWormhole',
array(
'action' => self::$action,
'nonce' => wp_create_nonce( self::$action )
)
);
}
/**
* AJAX handler for adding menu items.
*/
public static function do_ajax() {
if ( check_ajax_referer( self::$action, 'nonce' ) && current_user_can( 'edit_theme_options' ) ) {
require_once( ABSPATH . 'wp-admin/includes/nav-menu.php' );
$menu_ids = filter_input( INPUT_POST, 'menus', FILTER_DEFAULT, FILTER_REQUIRE_ARRAY );
if ( ! empty( $menu_ids ) ) {
$item_ids = array();
$menu_items = array();
foreach ( $menu_ids as $menu_id ) {
$menu_id = absint( $menu_id );
if ( is_nav_menu( $menu_id ) ) {
$menu = wp_get_nav_menu_object( $menu_id );
$menu_item_data = array(
'menu-item-title' => $menu->name,
'menu-item-type' => 'taxonomy',
'menu-item-url' => '',
'menu-item-object' => 'nav_menu',
'menu-item-object-id' => $menu->term_id,
);
$menu_item = wp_update_nav_menu_item( 0, 0, $menu_item_data );
if ( ! is_wp_error( $menu_item ) ) {
$item_ids[] = $menu_item;
}
}
}
foreach ( $item_ids as $menu_item_id ) {
$menu_obj = get_post( $menu_item_id );
if ( ! empty( $menu_obj->ID ) ) {
$menu_obj = wp_setup_nav_menu_item( $menu_obj );
$menu_obj->label = $menu_obj->title; // don't show "(pending)" in ajax-added items
$menu_items[] = $menu_obj;
}
}
if ( $menu_items ) {
$class = apply_filters( 'wp_edit_nav_menu_walker', 'Walker_Nav_Menu_Edit', 0 );
$args = array( 'walker' => new $class );
echo walk_nav_menu_tree( $menu_items, 0, (object) $args );
}
}
} else {
die( '-1' );
}
exit;
}
/**
* Handle display of nav menus as menu items.
*
* @param string $item_output
* @param object $item
* @param int $depth
* @param object $args
*
* @return string
*/
public static function walker_nav_menu_start_el( $item_output, $item, $depth, $args ) {
if ( 'taxonomy' === $item->type && 'nav_menu' === $item->object ) {
if ( $menu = wp_get_nav_menu_object( $item->object_id ) ) {
global $wp_filter;
// Backup global nav menu args
$filters = isset( $wp_filter['wp_nav_menu_args'] ) ? $wp_filter['wp_nav_menu_args'] : false;
// Remove all nav menu arg filters so we can use wp_nav_menu() without rolling our own code from scratch
remove_all_filters( 'wp_nav_menu_args' );
$url = get_post_meta( $item->ID, '_menu_item_url', true );
$item_output = empty( $url ) ? '<a href="javascript:">' : '<a href="' . esc_url( $url ) . '">';
$item_output .= wp_kses( $item->title, self::get_allowed_menu_link_html() ) . '</a>';
$item_output .= wp_nav_menu(
array(
'menu' => $menu->term_id,
'container' => false,
'menu_id' => $args->menu_id,
'menu_class' => 'sub-menu',
'echo' => false,
'before' => $args->before,
'after' => $args->after,
'link_before' => $args->link_before,
'link_after' => $args->link_after,
'items_wrap' => $args->items_wrap,
'depth' => $args->depth,
'walker' => $args->walker,
)
);
// If there were filters that we backed up, restore them now
if ( $filters ) {
$wp_filter['wp_nav_menu_args'] = $filters;
}
}
}
return $item_output;
}
/**
* Overrides the admin nav menu walker
*
* @link https://core.trac.wordpress.org/ticket/18584
*
* @return string
*/
public static function wp_edit_nav_menu_walker() {
require_once __DIR__ . '/inc/walker-nav-menu-edit.php';
add_action( 'wp_nav_menu_item_custom_fields', array( __CLASS__, 'render_menu_item_edit_fields' ), 10, 2 );
return 'mPress_Menu_Wormhole_Walker_Nav_Menu_Edit';
}
/**
* Saves our menu item URL
*
* @param int $menu_id
* @param int $menu_item_id
* @param array $args
*/
public static function wp_update_nav_menu_item( $menu_id, $menu_item_id, $args ) {
if ( 'nav_menu' === $args['menu-item-object'] && 'taxonomy' === $args['menu-item-type'] ) {
if ( isset( $_POST['menu-item-url'] ) && isset( $_POST['menu-item-url'][ $menu_item_id ] ) ) {
update_post_meta( $menu_item_id, '_menu_item_url', esc_url_raw( $_POST['menu-item-url'][ $menu_item_id ] ) );
}
}
}
/**
* Render our custom menu item edit fields
*
* @param int $item_id
* @param object $item
*/
public static function render_menu_item_edit_fields( $item_id, $item ) {
if ( 'nav_menu' === $item->object && 'taxonomy' === $item->type ) {
$url = get_post_meta( $item_id, '_menu_item_url', true );
?>
<p class="field-url description description-wide">
<label>
URL<br>
<input type="text" class="widefat code edit-menu-item-url"
name="menu-item-url[<?php echo absint( $item->ID ); ?>]"
value="<?php echo esc_url( $url ); ?>">
</label>
</p>
<?php
}
}
}
mPress_Menu_Wormhole::initialize();