commercetools-8.x-1.2-alpha1/modules/commercetools_content/src/Form/CartForm.php

<?php

namespace Drupal\commercetools_content\Form;

use Drupal\commercetools\CommercetoolsCarts;
use Drupal\commercetools\Exception\CommercetoolsGraphqlErrorException;
use Drupal\commercetools\Form\UiModuleSettingsFormBase;
use Drupal\commercetools\Routing\UiModulesRouteProviderBase;
use Drupal\commercetools_content\Routing\RouteProvider;
use Drupal\Core\Form\FormBase;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Url;
use Symfony\Component\DependencyInjection\ContainerInterface;

/**
 * Provides cart form.
 */
class CartForm extends FormBase {

  /**
   * Current cart.
   *
   * @var ?array
   */
  protected $cart = NULL;

  /**
   * The commercetools cart service.
   *
   * @var \Drupal\commercetools\CommercetoolsCarts
   */
  protected CommercetoolsCarts $ctCart;

  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container) {
    $instance = parent::create($container);
    $instance->ctCart = $container->get('commercetools.carts');
    return $instance;
  }

  /**
   * {@inheritdoc}
   */
  public function getFormId() {
    return 'commercetools_content_cart_form';
  }

  /**
   * {@inheritdoc}
   */
  public function buildForm(array $form, FormStateInterface $form_state, $install_state = NULL) {
    $cart = $this->getCart();

    $form['#theme'] = 'commercetools_cart_form';
    $form['#attributes']['id'][] = 'commercetools-cart-form';
    $form['#attached']['library'][] = 'commercetools_content/carts';
    $form['#cart'] = $cart;

    $form['lineItems'] = [
      '#type' => 'container',
      '#tree' => TRUE,
    ];
    foreach ($cart['lineItems'] as $lineItem) {
      $form['lineItems'][$lineItem['id']]['quantity'] = [
        '#type' => 'hidden',
        '#default_value' => $lineItem['quantity'],
        '#attributes' => ['class' => ['line-item-quantity']],
      ];
      $form['lineItems'][$lineItem['id']]['remove'] = [
        '#type' => 'hidden',
        '#default_value' => FALSE,
        '#attributes' => ['class' => ['line-item-quantity']],
      ];
    }

    $form['cartUpdate'] = [
      '#type' => 'submit',
      '#value' => $this->t('Update'),
      '#submit' => ['::updateCart'],
      '#ajax' => [
        'callback' => '::ajaxCallback',
        'disable-refocus' => FALSE,
        'event' => 'click',
        'wrapper' => 'commercetools-cart-form',
        'progress' => [
          'type' => 'fullscreen',
          'message' => $this->t('Updating...'),
        ],
      ],
      '#attributes' => ['class' => ['cart-update-button']],
    ];

    $form['discounts'] = [
      '#type' => 'container',
      '#attributes' => ['id' => 'discounts-wrapper'],
    ];
    $form['discounts']['discount_code'] = [
      '#type' => 'textfield',
      '#title' => $this->t('Your discount code (optional)'),
    ];
    $form['discounts']['wrap'] = [
      '#type' => 'container',
      '#attributes' => ['class' => 'form-actions', 'mb-3'],
    ];
    $form['discounts']['wrap']['submit_discounts'] = [
      '#type' => 'submit',
      '#value' => $this->t('Redeem Code'),
      '#submit' => ['::submitDiscounts'],
      '#states' => [
        'enabled' => [
          ':input[name="discount_code"]' => ['filled' => TRUE],
        ],
      ],
    ];
    if (!empty($cart['discountCodes'])) {
      $form['discounts_wrap'] = [
        '#type' => 'container',
        '#attributes' => [
          'class' => ['d-flex', 'flex-nowrap', 'gap-2', 'mb-3'],
        ],
      ];
      foreach ($cart['discountCodes'] as $discountCode) {
        $discountCodeId = $discountCode['id'];
        $form['discounts_wrap']['discounts'][$discountCodeId] = [
          '#type' => 'container',
          '#attributes' => [
            'class' => ['bg-success', 'd-flex', 'p-1', 'align-items-center'],
          ],
        ];
        $form['discounts_wrap']['discounts'][$discountCodeId]['text'] = ['#markup' => "<span>{$discountCode['name']}</span>"];
        $form['discounts_wrap']['discounts'][$discountCodeId]['remove'] = [
          '#type' => 'button',
          '#name' => 'remove-' . $discountCodeId,
          '#value' => '',
          '#attributes' => [
            'class' => ['btn-close', 'ms-2'],
            'aria-label' => ['Remove'],
            'data-key' => $discountCode['code'],
            'data-id' => $discountCodeId,
          ],
          '#submit' => ['::removeDiscountSubmit'],
        ];
      }
    }

    $checkoutPath = $this->config(ContentSettingsForm::CONFIGURATION_NAME)
      ->get(UiModuleSettingsFormBase::CONFIG_CHECKOUT_PATH);

    $form['actions'] = [
      '#type' => 'actions',
      '#access' => !empty($cart['lineItems']),
      'submit' => [
        '#type' => 'link',
        '#title' => $this->t('Checkout'),
        '#url' => isset($checkoutPath)
          ? Url::fromRoute(RouteProvider::ROUTE_PREFIX . UiModulesRouteProviderBase::PAGE_CHECKOUT_ROUTE)
          : Url::fromUserInput('#'),
        '#attributes' => [
          'class' => [
            'btn',
            'btn-primary',
            isset($checkoutPath) ? '' : 'disabled',
          ],
        ],
      ],
    ];

    $form['#cache']['contexts'] = [
      'commercetools_cart',
    ];
    return $form;
  }

  /**
   * Ajax callback to update product variant.
   */
  public function ajaxCallback(array &$form, FormStateInterface $form_state) {
    return $form;
  }

  /**
   * Submit function to update a user cart.
   */
  public function updateCart(array $form, FormStateInterface $form_state) {
    $cart = $this->getCart();
    $actions = [];
    foreach ($form_state->getValue('lineItems') as $lineItemId => $lineItem) {
      $actions[] = $lineItem['remove']
        ? ['removeLineItem' => ['lineItemId' => $lineItemId]]
        : ['changeLineItemQuantity' => ['lineItemId' => $lineItemId, 'quantity' => (int) $lineItem['quantity']]];
    }
    $this->ctCart->updateCart($cart['id'], $cart['version'], $actions);
    $this->cart = NULL;
    $form_state->setRebuild();
  }

  /**
   * {@inheritdoc}
   */
  public function submitForm(array &$form, FormStateInterface $form_state) {
  }

  /**
   * Submit discount callback.
   */
  public function submitDiscounts(array &$form, FormStateInterface $form_state) {
    $cart = $this->getCart();
    $code = trim($form_state->getValue('discount_code'));

    try {
      $response = $this->ctCart->updateCart($cart['id'], $cart['version'], [
        [
          'addDiscountCode' => [
            'code' => $code,
          ],
        ],
      ]);
    }
    catch (CommercetoolsGraphqlErrorException $e) {
      $knownError = FALSE;
      foreach ($e->getMessages() as $message) {
        if (str_starts_with($message, 'The discount code \'')) {
          $this->messenger()->addWarning($this->t(
            "The discount code '@code' was not found.",
            ['@code' => $code]
          ));
          $knownError = TRUE;
          break;
        }
      }
      if (!$knownError) {
        throw $e;
      }
    }

    if (!empty($response)) {
      $this->cart = $response->getData();
      $this->messenger()->addMessage($this->t("Successfully redeemed code: '@code'", ['@code' => $code]));
    }
    else {
      $this->cart = NULL;
    }
  }

  /**
   * Remove discount callback.
   */
  public function removeDiscountSubmit(array &$form, FormStateInterface $form_state) {
    $cart = $this->getCart();
    $actions_element = $form_state->getTriggeringElement();
    $codeId = $actions_element["#attributes"]["data-id"];

    try {
      $response = $this->ctCart->updateCart($cart['id'], $cart['version'], [
        [
          'removeDiscountCode' => [
            'discountCode' => [
              'typeId' => 'discount-code',
              'id' => $codeId,
            ],
          ],
        ],
      ]);
    }
    catch (CommercetoolsGraphqlErrorException $e) {
      foreach ($e->getMessages() as $message) {
        $this->messenger()->addWarning($message);
      }
    }

    if (!empty($response)) {
      $this->cart = $response->getData();
      $code = $actions_element['#attributes']['data-key'];
      $this->messenger()->addMessage($this->t("The following code has been removed from the cart: '@code'", ['@code' => $code]));
    }
    else {
      $this->cart = NULL;
    }
  }

  /**
   * Get cart.
   */
  protected function getCart(bool $refresh = FALSE) {
    if (!empty($this->cart) && !$refresh) {
      return $this->cart;
    }

    $cartResponse = $this->ctCart->getCurrentCart();
    $cart = !empty($cartResponse)
      ? $cartResponse->getData()
      : [
        'totalLineItemQuantity' => 0,
        'lineItems' => [],
      ];

    $this->cart = $cart;

    return $cart;
  }

}