Fix psalm errors

modules/ppcp-webhooks/src/Handler/VaultPaymentTokenCreated.php

@@ -11,55 +11,94 @@ namespace WooCommerce\PayPalCommerce\Webhooks\Handler;
 
 use Psr\Log\LoggerInterface;
 use WooCommerce\PayPalCommerce\WcGateway\Processor\AuthorizedPaymentsProcessor;
+use WP_REST_Request;
+use WP_REST_Response;
 
+/**
+ * Class VaultPaymentTokenCreated
+ */
 class VaultPaymentTokenCreated implements RequestHandler {
 
 	/**
+	 * The logger.
+	 *
 	 * @var LoggerInterface
 	 */
 	protected $logger;
 
 	/**
+	 * The prefix.
+	 *
 	 * @var string
 	 */
 	protected $prefix;
 
 	/**
+	 * The authorized payment processor.
+	 *
 	 * @var AuthorizedPaymentsProcessor
 	 */
 	protected $authorized_payments_processor;
 
+	/**
+	 * VaultPaymentTokenCreated constructor.
+	 *
+	 * @param LoggerInterface             $logger The logger.
+	 * @param string                      $prefix The prefix.
+	 * @param AuthorizedPaymentsProcessor $authorized_payments_processor The authorized payment processor.
+	 */
 	public function __construct( LoggerInterface $logger, string $prefix, AuthorizedPaymentsProcessor $authorized_payments_processor ) {
 		$this->logger                        = $logger;
 		$this->prefix                        = $prefix;
 		$this->authorized_payments_processor = $authorized_payments_processor;
 	}
 
+	/**
+	 * The event types a handler handles.
+	 *
+	 * @return string[]
+	 */
 	public function event_types(): array {
 		return array(
 			'VAULT.PAYMENT-TOKEN.CREATED',
 		);
 	}
 
-	public function responsible_for_request( \WP_REST_Request $request ): bool {
+	/**
+	 * Whether a handler is responsible for a given request or not.
+	 *
+	 * @param WP_REST_Request $request The request.
+	 *
+	 * @return bool
+	 */
+	public function responsible_for_request( WP_REST_Request $request ): bool {
 		return in_array( $request['event_type'], $this->event_types(), true );
 	}
 
-	public function handle_request( \WP_REST_Request $request ): \WP_REST_Response {
+	/**
+	 * Responsible for handling the request.
+	 *
+	 * @param WP_REST_Request $request The request.
+	 *
+	 * @return WP_REST_Response
+	 */
+	public function handle_request( WP_REST_Request $request ): WP_REST_Response {
 		$response = array( 'success' => false );
 
-		$customer_id = $request['resource']['customer_id'] ?? '';
+		$customer_id = null !== $request['resource'] && isset( $request['resource']['customer_id'] )
+			? $request['resource']['customer_id']
+			: '';
 		if ( ! $customer_id ) {
 			$message = 'No customer id was found.';
 			$this->logger->warning( $message, array( 'request' => $request ) );
 			$response['message'] = $message;
-			return new \WP_REST_Response( $response );
+			return new WP_REST_Response( $response );
 		}
 
 		$wc_customer_id = (int) str_replace( $this->prefix, '', $customer_id );
 		$this->authorized_payments_processor->capture_authorized_payments_for_customer( $wc_customer_id );
 
 		$response['success'] = true;
-		return rest_ensure_response( $response );
+		return new WP_REST_Response( $response );
 	}
 }