woocommerce-paypal-payments/modules/ppcp-vaulting/src/PaymentTokenHelper.php

<?php
/**
 * Payment Tokens helper methods.
 *
 * @package WooCommerce\PayPalCommerce\Vaulting
 */

declare(strict_types=1);

namespace WooCommerce\PayPalCommerce\Vaulting;

use WC_Payment_Token;

/**
 * Class PaymentTokenHelper
 */
class PaymentTokenHelper {

	/**
	 * Checks if given token exist as WC Payment Token.
	 *
	 * @param WC_Payment_Token[] $wc_tokens WC Payment Tokens.
	 * @param string             $token_id Payment Token ID.
	 * @param ?string            $class_name Class name of the token.
	 * @return bool
	 */
	public function token_exist( array $wc_tokens, string $token_id, ?string $class_name = null ): bool {
		foreach ( $wc_tokens as $wc_token ) {
			if ( $wc_token->get_token() === $token_id ) {
				if ( null !== $class_name ) {
					if ( $wc_token instanceof $class_name ) {
						return true;
					}
				} else {
					return true;
				}
			}
		}

		return false;
	}

	/**
	 * Checks if given token exist as WC Payment Token.
	 *
	 * @param array  $wc_tokens WC Payment Tokens.
	 * @param string $class_name Class name of the token.
	 * @return null|WC_Payment_Token
	 */
	public function first_token_of_type( array $wc_tokens, string $class_name ) {
		foreach ( $wc_tokens as $wc_token ) {
			if ( $wc_token instanceof $class_name ) {
				return $wc_token;
			}
		}

		return null;
	}
}