function image_replace_entity_presave in Image Replace 8

Implements hook_field_attach_presave().

Insert image mappings into the image replace table when entities are saved.

File

./image_replace.module, line 93

Provides an image style effect replacing the whole image with another one.

Code

function image_replace_entity_presave(EntityInterface $entity) {
  if (!$entity instanceof ContentEntityInterface) {
    return;
  }

  // Collect involved image fields and target mapping from image instance
  // settings.
  $involved_fields = [];
  $target_map = [];
  foreach (_image_replace_image_fields($entity
    ->getEntityTypeId(), $entity
    ->bundle()) as $target_field => $field) {
    if ($field && ($source_map = $field
      ->getThirdPartySetting('image_replace', 'image_style_map', []))) {
      $involved_fields[$target_field] = $target_field;
      foreach ($source_map as $target_style => $record) {
        $source_field = $record['source_field'];
        $target_map[$target_field][$target_style] = $source_field;
        $involved_fields[$source_field] = $source_field;
      }
    }
  }

  // Extract all uris from all involved image fields.
  $uri_map = [];
  foreach ($involved_fields as $field_name) {
    $uri_map[$field_name] = [];
    if (!empty($entity->{$field_name})) {
      foreach ($entity->{$field_name} as $image) {
        $uri_map[$field_name][] = $image->entity
          ->getFileUri();
      }
    }
  }

  // Synchronize image replacement entries.
  $storage_service = \Drupal::service('image_replace.storage');
  foreach ($target_map as $target_field => $source_map) {
    foreach ($source_map as $target_style => $source_field) {
      foreach ($uri_map[$target_field] as $delta => $target_uri) {
        $storage_service
          ->remove($target_style, $target_uri);
        if (isset($uri_map[$source_field][$delta])) {
          $storage_service
            ->add($target_style, $target_uri, $uri_map[$source_field][$delta]);
        }
      }
    }
  }

  // Flush derived images.
  foreach ($uri_map as $uris) {
    foreach ($uris as $uri) {
      image_path_flush($uri);
    }
  }
}