StateService.php

<?php
 
namespace Bitrix\Socialservices\OAuth;
 
use Bitrix\Main\Application;
use Bitrix\Main\Data\LocalStorage\SessionLocalStorage;
use Bitrix\Main\Web\Json;
 
final class StateService
{
    private const STORAGE_PREFIX = 'StateService';
    private static self $instance;
    private SessionLocalStorage $storage;
 
    public function __construct()
    {
        $this->storage = Application::getInstance()->getLocalSession(self::STORAGE_PREFIX);
    }
 
    private function saveState(string $state, array $payload): void
    {
        $this->storage->set($state, $payload);
    }
 
    #region public api
 
    public static function getInstance(): self
    {
        self::$instance ??= new self();
 
        return self::$instance;
    }
 
    public function createState(array $payload, bool $appendTimestamp = true): string
    {
        $value = Json::encode($payload);
        if ($appendTimestamp)
        {
            $value .= time();
        }
 
        $state = hash('sha224', $value);
        $this->saveState($state, $payload);
 
        return $state;
    }
 
    public function getPayload(string $state): ?array
    {
        $payload = $this->storage->get($state);
        if (is_array($payload))
        {
            return $payload;
        }
 
        return null;
    }
 
    #endregion public api
}