commerce_paypal-8.x-1.0-beta11/src/PluginForm/ExpressCheckoutForm.php

<?php

namespace Drupal\commerce_paypal\PluginForm;

use Drupal\Core\Form\FormStateInterface;
use Drupal\commerce_payment\Exception\PaymentGatewayException;
use Drupal\commerce_payment\PluginForm\PaymentOffsiteForm as BasePaymentOffsiteForm;

/**
 * The express checkout form class.
 */
class ExpressCheckoutForm extends BasePaymentOffsiteForm {

  /**
   * {@inheritdoc}
   */
  public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
    $form = parent::buildConfigurationForm($form, $form_state);

    /** @var \Drupal\commerce_payment\Entity\PaymentInterface $payment */
    $payment = $this->entity;
    /** @var \Drupal\commerce_paypal\Plugin\Commerce\PaymentGateway\ExpressCheckoutInterface $payment_gateway_plugin */
    $payment_gateway_plugin = $payment->getPaymentGateway()->getPlugin();

    $extra = [
      'return_url' => $form['#return_url'],
      'cancel_url' => $form['#cancel_url'],
      'capture' => $form['#capture'],
    ];
    $paypal_response = $payment_gateway_plugin->setExpressCheckout($payment, $extra);

    // If we didn't get a TOKEN back from PayPal, then the
    // $paypal_response['ACK'] == 'Failure', we need to exit checkout.
    if (empty($paypal_response['TOKEN'])) {
      throw new PaymentGatewayException(sprintf('[PayPal error #%s]: %s', $paypal_response['L_ERRORCODE0'], $paypal_response['L_LONGMESSAGE0']));
    }

    $order = $payment->getOrder();
    $order->setData('paypal_express_checkout', [
      'flow' => 'ec',
      'token' => $paypal_response['TOKEN'],
      'payerid' => FALSE,
      'capture' => $extra['capture'],
    ]);
    $order->save();
    $data = [
      'token' => $paypal_response['TOKEN'],
      'return' => $form['#return_url'],
      'cancel' => $form['#cancel_url'],
      'total' => $payment->getAmount()->getNumber(),
    ];

    return $this->buildRedirectForm($form, $form_state, $payment_gateway_plugin->getRedirectUrl(), $data, 'get');
  }

}