capi.module

<?php

/**
 * @file
 * Provides Meta Conversions API functionality.
 */

use Drupal\commerce_product\Entity\ProductInterface;
use Drupal\commerce_product\Entity\ProductVariationInterface;
use Drupal\Core\Cache\Cache;
use Drupal\Core\Entity\Display\EntityViewDisplayInterface;
use Drupal\Core\Url;

/**
 * Implements hook_page_attachments().
 */
function capi_page_attachments(array &$attachments): void {
  /** @var \Drupal\Core\Routing\AdminContext $admin_context */
  $admin_context = \Drupal::service('router.admin_context');
  if ($admin_context->isAdminRoute() === TRUE) {
    return;
  }

  $attachments['#cache']['contexts'][] = 'user.roles';
  $attachments['#cache']['tags'][] = 'config:capi.settings';

  /** @var \Drupal\capi\Service\PixelBuilderService $pixel_builder_service */
  $pixel_builder_service = \Drupal::service('capi.pixel_builder_service');

  if ($pixel_builder_service->isPixelEnabled()) {
    $attachments['#attached']['html_head'][] = [[
      '#tag' => 'script',
      '#value' => $pixel_builder_service->getPixelScriptCode(),
    ],
      'capi_script_code',
    ];

    $attachments['#attached']['html_head'][] = [[
      '#type' => 'inline_template',
      '#template' => $pixel_builder_service->getPixelNoScriptCode(),
    ],
      'capi_noscript_code',
    ];
  }
}

/**
 * Implements hook_ENTITY_TYPE_view() for product entities.
 */
function capi_commerce_product_view(
  array &$build,
  ProductInterface $product,
  EntityViewDisplayInterface $display,
  $view_mode
): void {
  $build['#cache']['contexts'] = Cache::mergeContexts($build['#cache']['contexts'], [
    'user.roles',
    'url.path',
    'url.query_args',
  ]);

  $build['#cache']['tags'][] = 'config:capi.settings';

  /** @var \Drupal\capi\Service\PixelBuilderService $pixel_builder_service */
  $pixel_builder_service = \Drupal::service('capi.pixel_builder_service');

  if (
    $product->isNew() === FALSE &&
    capi_is_product_page($product) &&
    empty($product->in_preview) &&
    $pixel_builder_service->isPixelEnabled()
  ) {
    $build['#attached']['library'][] = 'capi/view_content';

    // Retrieve the current product variation (default or from the 'v' query
    // parameter).
    /** @var \Drupal\commerce_product\ProductVariationStorageInterface $product_variation_storage */
    $product_variation_storage = \Drupal::entityTypeManager()->getStorage('commerce_product_variation');
    $product_variation = $product_variation_storage->loadFromContext($product);

    if ($product_variation instanceof ProductVariationInterface) {
      // Pass product variation data to JavaScript.
      $url = Url::fromRoute('capi.view_content_endpoint');
      $request = \Drupal::request();
      $build['#attached']['drupalSettings']['capi']['viewContent']['url'] = $url->toString();
      $build['#attached']['drupalSettings']['capi']['viewContent']['data'] = [
        'product_variation_id' => $product_variation->id(),
        'source_url' => $request->getUri(),
      ];
    }
  }
}

/**
 * Checks whether the current page is the full page view of passed-in product.
 *
 * @param \Drupal\commerce_product\Entity\ProductInterface $product
 *   A product entity.
 *
 * @return bool
 *   Return TRUE if this is a full product view; otherwise, return FALSE.
 */
function capi_is_product_page(ProductInterface $product): bool {
  $route_match = \Drupal::routeMatch();

  if ($route_match->getRouteName() === 'entity.commerce_product.canonical') {
    $product_param = $route_match->getParameter('commerce_product');
  }

  return (!empty($product_param) && $product_param->id() === $product->id());
}