Admin Bar // Añadir elementos al menú de cada sitio • Chez Brasofilo

Esta clase modifica la barra de administración de WordPress para añadir accesos directos para todos los sitios de la red.

Características Principales

🔹 Accesos Directos para Plugins en Toda la Red

Añade acceso rápido a plugins importantes de la red como:
- Snippets (Plugin Code Snippets)
- Wordfence (Seguridad)
- BackWPup (Copias de seguridad)

🔹 Personalización por Sitio

Elimina elementos por defecto (Nueva Entrada, Comentarios)
Añade un menú Plugins a la barra de administración de cada sitio
Muestra enlaces contextuales basados en:
- Permisos del usuario (requiere manage_options)
- Plugins activos en cada sitio

🔹 Herramientas Especiales para Sitios Específicos

Añade un menú ACF para el sitio ID 2 (personalizable)
Añade Ajustes de Admin a todos los sitios
Añade Snippets a todos los sitios

Cómo Funciona

La clase se engancha a la acción admin_bar_menu de WordPress (con prioridad tardía 100) para:

Añadir enlaces en la sección «Administración de la Red»
Personalizar el menú de cada sitio
Mostrar enlaces solo si el plugin está activo

// Ejemplo de los elementos personalizados en la barra de administración
Administración de Red > [Snippets] [Wordfence] [BackWPup]
Mis Sitios > 
  - Sitio 1 > [Plugins] [Ajustes de Admin] [Snippets]
  - Sitio 2 > [Plugins] [Ajustes de Admin] [Snippets] [ACF]

Solución originalmente publicada en mi respuesta en WordPress Stack Exchange.

<?php
/**
 * Plugin Name: Admin Bar - Add items to each site menu
 * Plugin URI:  https://brasofilo.com
 * Description: Based on the WordPress Stackexchange answer: https://wordpress.stackexchange.com/a/56246/12615
 * Version:     1.2.1
 * Author:      Rodolfo Buaiz
 * Author URI:  https://brasofilo.com
 * Last Updated: 2025-04-12
 *
 */

WPSE_55724_My_Sites_Extra_Items::init();

/**
 * The links to create on the single sites and the network menus
 */
class WPSE_55724_Config {
    public static function singlesite() {
        return [
            'plg' => [
                'title' => __('Plugins'),
                'basename' => false,
                'url'      => 'plugins.php',
            ],
            'mtt' => [
                'title' => __('Admin Tweaks'),
                'basename' => 'many-tips-together/many-tips-together.php',
                'url'      => 'options-general.php?page=options-general.php_admin_tweaks',
            ],
            'snp' => [
                'title' => __('Snippets'),
                'basename' => 'code-snippets/code-snippets.php',
                'url'      => 'admin.php?page=snippets&orderby=name&order=asc',
            ],
            'acf' => [
                'title' => __('ACF'),
                'basename' => 'advanced-custom-fields/acf.php',
                'url'      => 'edit.php?post_type=acf-field-group&ga=true',
                'blogs' => ['2'] /* Site IDs that gets special ACF menu */
            ],
            'igsc' => [
                'title' => __('IG Scanner'),
                'basename' => 'ig-scanner/ig-scanner.php',
                'url'      => 'tools.php?page=ig-scanner-page',
            ],
        ];
    }
    public static function network() {
        return [
            'snippets'  => [
                'title' => __('Snippets'),
                'basename' => 'code-snippets/code-snippets.php',
                'url' => 'admin.php?page=snippets&orderby=name&order=asc'
            ],
            'wordfence' => [
                'title' => __('Wordfence'),
                'basename' => 'wordfence/wordfence.php',
                'url' => 'admin.php?page=Wordfence'
            ],
            'backwpup'  => [
                'title' => __('BackWPup'),
                'basename' => 'backwpup/backwpup.php',
                'url' => 'admin.php?page=backwpup'
            ],
        ];
    }
}

/**
 * Class WPSE_55724_My_Sites_Extra_Items
 *
 * Adds custom items to the WordPress admin bar for multisite installations,
 * providing quick access to plugins and tools across the network.
 */
class WPSE_55724_My_Sites_Extra_Items
{
    /** @var null|WPSE_55724_My_Sites_Extra_Items Singleton instance */
    private static $instance = null;

    /** @var array Plugin basenames for active checks */
    private $singlesite_plugins;

    /** @var array Network plugins to add to admin bar */
    private $network_plugins;

    /**
     * Gets the singleton instance
     *
     * @return WPSE_55724_My_Sites_Extra_Items
     */
    public static function instance()
    {
        if (is_null(self::$instance)) {
            self::$instance = new self();
        }
        return self::$instance;
    }

    /**
     * Constructor - sets up plugin configurations
     */
    private function __construct()
    {
        $this->singlesite_plugins = WPSE_55724_Config::singlesite();
        $this->network_plugins = WPSE_55724_Config::network();
    }

    /**
     * Initializes the plugin
     */
    public static function init()
    {
        if (is_multisite()) {
            add_action('plugins_loaded', [self::instance(), 'setup']);
        }
    }

    /**
     * Sets up admin bar modifications if admin bar is showing
     */
    public function setup()
    {
        if (is_admin_bar_showing()) {
            add_action('admin_bar_menu', [$this, 'admin_bar_menu'], 9999);
        }
    }

    /**
     * Adds all custom items to the admin bar
     *
     * @param WP_Admin_Bar $adminbar The admin bar object
     */
    public function admin_bar_menu($adminbar)
    {
        $this->add_network_admin_items($adminbar);
        $this->add_singlesite_admin_items($adminbar);
    }

    /**
     * Adds network admin items to the admin bar
     *
     * @param WP_Admin_Bar $adminbar The admin bar object
     */
    private function add_network_admin_items($adminbar)
    {
        foreach ($this->network_plugins as $slug => $plugin) {
            if ($this->is_plugin_active($plugin['basename'])) {
                $adminbar->add_menu([
                    'parent' => 'network-admin',
                    'id'     => "network-admin-$slug",
                    'title'  => $plugin['title'],
                    'href'   => network_admin_url($plugin['url']),
                ]);
            }
        }
    }

    /**
     * Processes items for each site in the network
     *
     * @param WP_Admin_Bar $adminbar The admin bar object
     */
    private function add_singlesite_admin_items($adminbar)
    {
        foreach ((array) $adminbar->user->blogs as $blog) {
            switch_to_blog($blog->userblog_id);
            $this->modify_singlesite_menu($adminbar, $blog);
            restore_current_blog();
        }
    }

    /**
     * Modifies the admin bar menu for a specific blog
     *
     * @param WP_Admin_Bar $adminbar The admin bar object
     * @param object $blog The blog object
     */
    private function modify_singlesite_menu($adminbar, $blog)
    {
        $menu_id = 'blog-' . $blog->userblog_id;
        $this->remove_default_items($adminbar, $menu_id);
        $this->add_custom_menu_items($adminbar, $menu_id, $blog);
    }

    /**
     * Removes default items from the blog menu
     *
     * @param WP_Admin_Bar $adminbar The admin bar object
     * @param string $menu_id The parent menu ID
     */
    private function remove_default_items($adminbar, $menu_id)
    {
        $adminbar->remove_menu($menu_id . '-n'); // New Post
        $adminbar->remove_menu($menu_id . '-c'); // Comments
    }

    /**
     * Adds custom menu items for a blog if user has permissions
     *
     * @param WP_Admin_Bar $adminbar The admin bar object
     * @param string $menu_id The parent menu ID
     * @param object $blog The blog object
     */
    private function add_custom_menu_items($adminbar, $menu_id, $blog)
    {
        if (!current_user_can('manage_options')) {
            return;
        }
        foreach ($this->singlesite_plugins as $slug => $plugin) {
            if (!$plugin['basename'] || $this->is_plugin_active($plugin['basename'])) {
                $doit = true;
                if (isset($plugin['blogs']) && !in_array($blog->userblog_id, $plugin['blogs'])) {
                    $doit = false;
                }
                if ($doit) {
                    $adminbar->add_menu([
                        'parent' => $menu_id,
                        'id'     => "$menu_id-$slug",
                        'title'  => $plugin['title'],
                        'href'   => admin_url($plugin['url']),
                    ]);
                }
            }
        }
    }
    
    /**
     * Checks if a plugin is active either site-wide or network-wide
     *
     * @param string $plugin Plugin basename
     * @return bool True if plugin is active
     */
    private function is_plugin_active($plugin)
    {
        $sites = get_option('active_plugins', []);
        $network = get_site_option('active_sitewide_plugins', []);
        return in_array($plugin, $sites) || isset($network[$plugin]);
    }
}