public static function FastlyBackend::tagsHeaderValue in Acquia Purge 8

Format the given cache tags for the header value representation.

Parameters

string[] $tags: Non-associative array cache tags.

Overrides BackendInterface::tagsHeaderValue

See also

\Drupal\purge\Plugin\Purge\TagsHeader::getValue

File

src/AcquiaPlatformCdn/FastlyBackend.php, line 216

Class

FastlyBackend

Provides a Fastly backend for the Platform CDN purger.

Namespace

Drupal\acquia_purge\AcquiaPlatformCdn

Code

public static function tagsHeaderValue(array $tags) {
  $tags_hashed = self::getHashedTags($tags);

  // Always add a hashed site identifier to the tags on the Surrogate-Key
  // header, so that ::invalidateEverything() can use it to wipe the CDN.
  $tags[] = $identifier = self::platformInfo()
    ->getSiteIdentifier();
  $tags_hashed[] = current(Hash::cacheTags([
    $identifier,
  ]));
  return new TagsHeaderValue($tags, $tags_hashed);
}