ValidateCheckoutEndpoint.php

<?php

/**
 * The endpoint for validating the checkout form.
 *
 * @package WooCommerce\PayPalCommerce\Button\Endpoint
 */
declare (strict_types=1);
namespace WooCommerce\PayPalCommerce\Button\Endpoint;

use WooCommerce\PayPalCommerce\Vendor\Psr\Log\LoggerInterface;
use Throwable;
use WooCommerce\PayPalCommerce\Button\Exception\NonceValidationException;
use WooCommerce\PayPalCommerce\Button\Exception\ValidationException;
use WooCommerce\PayPalCommerce\Button\Validation\CheckoutFormValidator;
/**
 * Class ValidateCheckoutEndpoint.
 */
class ValidateCheckoutEndpoint implements \WooCommerce\PayPalCommerce\Button\Endpoint\EndpointInterface
{
    const ENDPOINT = 'ppc-validate-checkout';
    /**
     * The Request Data Helper.
     *
     * @var RequestData
     */
    private $request_data;
    /**
     * The CheckoutFormValidator.
     *
     * @var CheckoutFormValidator
     */
    private $checkout_form_validator;
    /**
     * The logger.
     *
     * @var LoggerInterface
     */
    private $logger;
    /**
     * ValidateCheckoutEndpoint constructor.
     *
     * @param RequestData           $request_data The Request Data Helper.
     * @param CheckoutFormValidator $checkout_form_validator    The CheckoutFormValidator.
     * @param LoggerInterface       $logger The logger.
     */
    public function __construct(\WooCommerce\PayPalCommerce\Button\Endpoint\RequestData $request_data, CheckoutFormValidator $checkout_form_validator, LoggerInterface $logger)
    {
        $this->request_data = $request_data;
        $this->checkout_form_validator = $checkout_form_validator;
        $this->logger = $logger;
    }
    /**
     * Returns the nonce.
     *
     * @return string
     */
    public static function nonce(): string
    {
        return self::ENDPOINT;
    }
    /**
     * Handles the request.
     */
    public function handle_request(): void
    {
        try {
            $data = $this->request_data->read_request($this->nonce());
            $form_fields = $data['form'];
            $this->checkout_form_validator->validate($form_fields);
            wp_send_json_success();
        } catch (NonceValidationException $error) {
            wp_send_json_error(array('message' => $error->getMessage()), 400);
        } catch (ValidationException $exception) {
            $response = array('message' => $exception->getMessage(), 'errors' => $exception->errors(), 'refresh' => isset(WC()->session->refresh_totals));
            unset(WC()->session->refresh_totals);
            wp_send_json_error($response);
        } catch (Throwable $error) {
            $this->logger->error("Form validation execution failed. {$error->getMessage()} {$error->getFile()}:{$error->getLine()}");
            wp_send_json_error(array('message' => $error->getMessage()));
        }
    }
}