messengermenu.php

<?php
 
namespace Bitrix\Seo\BusinessSuite\Configuration\Facebook\Fields\Config;
 
final class MessengerMenu extends AbstractConfigField
{
 
    const BUTTON_TEXT_RESERVE = 'Reserve';
    const BUTTON_TEXT_BOOK = 'Book Now';
    const BUTTON_TEXT_BUY = 'Buy Now';
 
    private static function checkButtonText($value) : bool
    {
        return array_key_exists('cta_button_text',$value) && in_array($value['cta_button_text'],[
                static::BUTTON_TEXT_BOOK,
                static::BUTTON_TEXT_RESERVE,
                static::BUTTON_TEXT_BUY
            ]);
 
    }
    private static function checkUrl($value) : bool
    {
        return array_key_exists('cta_button_url',$value) &&
            is_string($value['cta_button_url']) &&
            preg_match(self::URL_PATTERN,$value['cta_button_url']);
    }
 
    protected static function checkValueFields($value): bool
    {
        return static::checkButtonText($value) && static::checkUrl($value);
    }
 
    static function available(): bool
    {
        return true;
    }
 
    static function required(): bool
    {
        return false;
    }
    protected static function getFields() : array
    {
        return array_merge(parent::getFields(),['cta_button_url','cta_button_text']);
    }
}