commerce_addtocart_ajax-8.x-1.x-dev/commerce_addtocart_ajax.module

<?php

/**
 * @file
 * Contains commerce_addtocart_ajax module.
 */

use Drupal\Core\Ajax\AjaxResponse;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Routing\RouteMatchInterface;
use Drupal\commerce_cart\Form\AddToCartFormInterface;

/**
 * Implements hook_help().
 */
function commerce_addtocart_ajax_help($route_name, RouteMatchInterface $route_match) {
  switch ($route_name) {
    // Main module help for the commerce_addtocart_ajax module.
    case 'help.page.commerce_addtocart_ajax':
      $output = '';
      $output .= '<h3>' . t('About') . '</h3>';
      $output .= '<p>' . t('Add commerce AddToCart Ajax functionalities.') . '</p>';
      return $output;

    default:
      return '';
  }
}

/**
 * Implements hook_form_alter().
 */
function commerce_addtocart_ajax_form_alter(array &$form, FormStateInterface $form_state, $form_id) {
  // Check if the form builder implements the AddToCartFormInterface.
  if ($form_state->getBuildInfo()['callback_object'] instanceof AddToCartFormInterface) {
    /** @var \Drupal\commerce_addtocart_ajax\Helper\AjaxCartHelper $ajaxcart_helper */
    $ajaxcart_helper = \Drupal::service('commerce_addtocart_ajax.helper');
    $ajaxcart_helper->ajaxAddToCartAjaxForm($form, $form_id);
  }
}

/**
 * Implements hook_form_validate().
 */
function commerce_addtocart_ajax_ajax_validate(array &$form, FormStateInterface $form_state) {
  $response = new AjaxResponse();
  $form_id = $form_state->getUserInput()['form_id'];
  /** @var \Drupal\commerce_addtocart_ajax\Helper\AjaxCartHelper $ajax_helper */
  $ajax_helper = \Drupal::service('commerce_addtocart_ajax.helper');
  $ajax_helper->ajaxAddToCartAjaxResponse($form, $form_id, $response);
  return $response;
}

/**
 * Implements hook_preprocess_block().
 */
function commerce_addtocart_ajax_preprocess_block(&$vars) {
  if ($vars['base_plugin_id'] === 'commerce_cart') {
    // Add a class to the cart block so that we can replace it using Ajax.
    $vars['attributes']['class'][] = 'block-commerce-cart';
  }
}