<?php
/**
* Generates user ID token for payer.
*
* @package WooCommerce\PayPalCommerce\ApiClient\Authentication
*/
namespace WooCommerce\PayPalCommerce\ApiClient\Authentication;
use Psr\Log\LoggerInterface;
use WooCommerce\PayPalCommerce\ApiClient\Endpoint\RequestTrait;
use WooCommerce\PayPalCommerce\ApiClient\Exception\PayPalApiException;
use WooCommerce\PayPalCommerce\ApiClient\Exception\RuntimeException;
use WooCommerce\PayPalCommerce\ApiClient\Helper\Cache;
use WP_Error;
/**
* Class SdkClientToken
*/
class SdkClientToken {
use RequestTrait;
const CACHE_KEY = 'sdk-client-token-key';
/**
* The host.
*
* @var string
*/
private $host;
/**
* The logger.
*
* @var LoggerInterface
*/
private $logger;
/**
* The client credentials.
*
* @var ClientCredentials
*/
private $client_credentials;
/**
* The cache.
*
* @var Cache
*/
private $cache;
/**
* SdkClientToken constructor.
*
* @param string $host The host.
* @param LoggerInterface $logger The logger.
* @param ClientCredentials $client_credentials The client credentials.
* @param Cache $cache The cache.
*/
public function __construct(
string $host,
LoggerInterface $logger,
ClientCredentials $client_credentials,
Cache $cache
) {
$this->host = $host;
$this->logger = $logger;
$this->client_credentials = $client_credentials;
$this->cache = $cache;
}
/**
* Returns the client token for SDK `data-sdk-client-token`.
*
* @return string
*
* @throws PayPalApiException If the request fails.
* @throws RuntimeException If something unexpected happens.
*/
public function sdk_client_token(): string {
if ( $this->cache->has( self::CACHE_KEY ) ) {
return $this->cache->get( self::CACHE_KEY );
}
// phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized
$domain = wp_unslash( $_SERVER['HTTP_HOST'] ?? '' );
$domain = preg_replace( '/^www\./', '', $domain );
$url = trailingslashit( $this->host ) . 'v1/oauth2/token?grant_type=client_credentials&response_type=client_token&intent=sdk_init&domains[]=' . $domain;
$args = array(
'method' => 'POST',
'headers' => array(
'Authorization' => $this->client_credentials->credentials(),
'Content-Type' => 'application/x-www-form-urlencoded',
),
);
$response = $this->request( $url, $args );
if ( $response instanceof WP_Error ) {
throw new RuntimeException( $response->get_error_message() );
}
$json = json_decode( $response['body'] );
$status_code = (int) wp_remote_retrieve_response_code( $response );
if ( 200 !== $status_code ) {
throw new PayPalApiException( $json, $status_code );
}
$access_token = $json->access_token;
$expires_in = (int) $json->expires_in;
$this->cache->set( self::CACHE_KEY, $access_token, $expires_in );
return $access_token;
}
}