consent.php

<?php
 
namespace Bitrix\Sender\Consent;
 
use Bitrix\Main\Web\Json;
use Bitrix\Sender\ContactTable;
use Bitrix\Sender\Transport;
use Bitrix\Main\ArgumentNullException;
use Bitrix\Main\Security\Sign\TimeSigner;
 
final class Consent
{
    private const SALT = "SENDER_CONSENT_SALT";
    
    private static function getTransport(?string $code): Transport\Adapter
    {
        static $transports = [];
        if(!isset($transports[$code]))
        {
            $transports[$code] = Transport\Adapter::create($code);
        }
        return $transports[$code];
    }
    
    public static function isUnsub(string $status, ?int $requests, ?string $code): bool
    {
        return Consent::getTransport($code)->isConsentAvailable() &&
            (
                $status === ContactTable::CONSENT_STATUS_DENY ||
                Consent::checkIfConsentRequestLimitExceeded($requests, $code) &&
                $status !== ContactTable::CONSENT_STATUS_ACCEPT
            );
    }
 
    public static function checkIfConsentRequestLimitExceeded(int $requests, string $code): bool
    {
        return  $requests > Consent::getTransport($code)->getConsentMaxRequests();
    }
    
    public static function encodeTag(array $fields): string
    {
        if(isset($fields))
        {
            $signer = new TimeSigner();
            $tagString = Json::encode($fields);
            return $signer->sign($tagString,"+ 4 weeks", Consent::SALT);
        }
        
        throw new ArgumentNullException("fields");
    }
    public static function decodeTag(string $tag)
    {
        $signer = new TimeSigner();
        $tag = $signer->unsign($tag,static::SALT);
        return Json::decode($tag);
    }
}