felixarntz/oop-admin-pages

<?php
/**
 * WordPress_Admin_Menu_Page class
 *
 * @package Leaves_And_Love\OOP_Admin_Pages\Admin_Page
 * @since 1.0.0
 */

namespace Leaves_And_Love\OOP_Admin_Pages\Admin_Page;

/**
 * Class representing a WordPress admin page that also has a top-level menu entry.
 *
 * @since 1.0.0
 */
class WordPress_Admin_Menu_Page extends WordPress_Admin_Page {

    const MENU_TITLE  = 'menu_title';
    const ICON_URL    = 'icon_url';
    const POSITION    = 'position';

    /**
     * Gets the callback to use to register the admin page within WordPress.
     *
     * @since 1.0.0
     *
     * @return callable Callback to hook into the respective menu action.
     */
    protected function get_register_hook_callback() {
        return function() {
            $slug       = $this->getConfigKey( self::SLUG );
            $title      = $this->getConfigKey( self::TITLE );
            $capability = $this->getConfigKey( self::CAPABILITY );
            $menu_title = $this->hasConfigKey( self::MENU_TITLE ) ? $this->getConfigKey( self::MENU_TITLE ) : $title;
            $icon_url   = $this->hasConfigKey( self::ICON_URL ) ? $this->getConfigKey( self::ICON_URL ) : '';
            $position   = $this->hasConfigKey( self::POSITION ) ? $this->getConfigKey( self::POSITION ) : null;

            $hook_suffix = add_menu_page( $title, $menu_title, $capability, $slug, array( $this, 'render' ), $icon_url, $position );

            add_action( "load-{$hook_suffix}", array( $this, 'initialize' ) );
        };
    }
}