mcp/app/Menus/ItemValidator.php

<?php

namespace App\Menus;

use PhpSchool\CliMenu\MenuItem\StaticItem;
use Respect\Validation\Exceptions\NestedValidationException;

/**
 *
 *
 * 
 *
 */
class ItemValidator
{
    // items from menu
    private $items;

    // current message
    private $message;

    // validator
    private $validator;

    /**
     *
     *
     */
    public function __construct($validator)
    {
        $this->validator = $validator;
        $this->message = new StaticItem(''); // must create to compare in items
    }

    /**
     *  remove all items from menu and save them
     *
     *  @param  [type] $menu
     *
     */
    private function clear(&$menu)
    {
        $this->items = $menu->getItems();

        foreach($menu->getItems() as $item) {
            $menu->removeItem($item);
        }
    }

    /**
     *  add staticItem after item
     *
     *  @param [type] $menu
     *  @param [type] $after
     *  @param [type] $target
     *
     */
    private function addAfter(&$menu, $after, $target)
    {
        $this->clear($menu);

        foreach($this->items as $item) {
            $menu->addItem($item);

            if ($after === $item) {
                $menu->addItem($target, true);
            }
        }
    }

    /**
     *  remove staticItem
     *
     *
     *  @param  [type] $menu   [description]
     *  @param  [type] $target [description]
     *
     */
    private function remove(&$menu, $target)
    {
        $this->clear($menu);

        foreach($this->items as $item) {
            if ($item === $target) {
                continue;
            }

            $menu->addItem($item);
        }
    }

    /**
     *  validate,
     *  if failed show staticItem with errors,
     *  if not remove staticItem if found
     *
     *  @param  [type] $menu
     *  @param  [type] $item
     *  @param  [type] $data
     *
     */
    public function validate(&$menu, $item, $data)
    {
        try {
            $this->validator->assert($data);
        } catch(NestedValidationException $exception) {
            $errors = $exception->getMessages();
        }

        if (isset($errors)) {

            // @TODO use ColorUtil
            $this->message->setText("\033[33m"."\xE2\x9A\xA0 ".join(' ', $errors));
            $this->addAfter($menu, $item, $this->message);
        } else {
            $this->remove($menu, $this->message);
        }
    }
}