public function EasyBreadcrumbStructuredDataJsonLd::value in Easy Breadcrumb 8

Same name and namespace in other branches

1. 2.x src/EasyBreadcrumbStructuredDataJsonLd.php \Drupal\easy_breadcrumb\EasyBreadcrumbStructuredDataJsonLd::value()

Build JSON-LD value.

File

src/EasyBreadcrumbStructuredDataJsonLd.php, line 68

Class

EasyBreadcrumbStructuredDataJsonLd

Class EasyBreadcrumbStructuredDataJsonLd.

Namespace

Drupal\easy_breadcrumb

Code

public function value() {
  $value = FALSE;
  $config = $this->configFactory
    ->get(EasyBreadcrumbConstants::MODULE_SETTINGS);
  if ($config
    ->get(EasyBreadcrumbConstants::ADD_STRUCTURED_DATA_JSON_LD)) {

    /** @var \Drupal\Core\Breadcrumb\Breadcrumb $breadcrumb */
    $breadcrumb = $this->easyBreadcrumbBuilder
      ->build($this->routeMatch);
    $links = $breadcrumb
      ->getLinks();

    // Only fire if at least one link present.
    if (count($links) > 0) {

      // Open JSON.
      $value = '{
          "@context": "https://schema.org",
          "@type": "BreadcrumbList",
          "itemListElement": [';
      $position = 1;

      /** @var \Drupal\Core\Link $link */
      foreach ($links as $link) {
        $name = $link
          ->getText();
        $item = $link
          ->getUrl()
          ->setAbsolute(TRUE)
          ->toString();

        // Escape " to produce valid json for titles with "" in them.
        $name = str_replace('"', '\\"', $name);
        $item = str_replace('"', '\\"', $item);

        // Add a comma before each item except the first.
        if ($position > 1) {
          $value .= ',';
        }

        // Only add item if link's not empty.
        if (!empty($item)) {
          $value .= '{
            "@type": "ListItem",
            "position": "' . $position . '",
            "name": "' . $name . '",
            "item": "' . $item . '"
          }';
        }
        else {
          $value .= '{
              "@type": "ListItem",
              "position": "' . $position . '",
              "name": "' . $name . '"
            }';
        }

        // Increment position for next run.
        $position++;
      }

      // Close JSON.
      $value .= ']}';
    }
  }
  return $value;
}