commercetools-8.x-1.2-alpha1/modules/commercetools_decoupled/src/CtAuth.php

<?php

namespace Drupal\commercetools_decoupled;

use Commercetools\Client\OAuth2Handler;
use Drupal\commercetools\CommercetoolsApiServiceInterface;
use Drupal\Component\Datetime\TimeInterface;

/**
 * Service for obtaining Commercetools tokens.
 */
class CtAuth {

  /**
   * List of limited scopes for anonymous connections directly on the frontend.
   */
  const SCOPES = [
    'view_published_products',
    'view_categories',
  ];

  /**
   * Auth Handler.
   *
   * @var \Commercetools\Client\OAuth2Handler
   */
  protected OAuth2Handler $authHandler;

  /**
   * CtAuth constructor.
   *
   * @param \Drupal\commercetools\CommercetoolsApiServiceInterface $ctApi
   *   The Commercetools API service.
   * @param \Drupal\Component\Datetime\TimeInterface $time
   *   System time service.
   */
  public function __construct(
    protected CommercetoolsApiServiceInterface $ctApi,
    protected TimeInterface $time,
  ) {}

  /**
   * Builds the OAuth2 Authorization header for FE requests.
   *
   * @return string
   *   The Authorization header value.
   */
  public function getAuthorizationHeader(): string {
    $this->authHandler = $this->ctApi->getAuthHandler(scope: static::SCOPES);
    return $this->authHandler->getAuthorizationHeader();
  }

  /**
   * Calculates the absolute cache expiry for the current access token.
   *
   * @return int
   *   UNIX timestamp when the token/header expires.
   */
  public function getCacheExpire(): int {
    return $this->time->getRequestTime() + $this->authHandler->refreshToken()->getExpiresIn();
  }

}