authflow.php

См. документацию.

<?php
 
namespace Bitrix\Socialservices\Controller;
 
use \Bitrix\Main\Context,
    \Bitrix\Main\Engine,
    \Bitrix\Main\Engine\ActionFilter\Csrf,
    \Bitrix\Main\Engine\ActionFilter\Authentication;
 
 
class AuthFlow extends Engine\Controller
{
    private const APPLE_OAUTH_URL = 'https://appleid.apple.com/auth/authorize';
 
    public function configureActions(): array
    {
        return [
            'signInApple' => [
                '-prefilters' => [
                    Csrf::class,
                    Authentication::class
                ]
            ]
        ];
    }
 
    public function signInAppleAction(): void
    {
        $redirectUrl = $this->getRequest()->getQuery('url');
 
        if (!\is_string($redirectUrl))
        {
            return;
        }
 
        if (strpos($redirectUrl, self::APPLE_OAUTH_URL) === 0)
        {
            LocalRedirect($redirectUrl, true);
            die();
        }
    }
}