/**
* Transforms an entity into an array of strings.
*
* Parses an entity's fields and for every field it builds an array of string
* to be compared. Basically this function transforms an entity into an array
* of strings.
*
* @param ContentEntityInterface $entity
* An entity containing fields.
*
* @return array
* Array of strings resulted by parsing the entity.
*/
public function parseEntity(ContentEntityInterface $entity)
{
$result = array();
$langcode = \Drupal::languageManager()->getCurrentLanguage(LanguageInterface::TYPE_CONTENT)->getId();
// Load entity of current language, otherwise fields are always compared by
// their default language.
if ($entity->hasTranslation($langcode)) {
$entity = $entity->getTranslation($langcode);
}
$entity_type_id = $entity->getEntityTypeId();
// Load all entity base fields.
$entity_base_fields = $this->entityManager->getBaseFieldDefinitions($entity_type_id);
// Loop through entity fields and transform every FieldItemList object
// into an array of strings according to field type specific settings.
foreach ($entity as $field_items) {
$field_type = $field_items->getFieldDefinition()->getType();
$plugin_config = $this->pluginsConfig->get('field_types.' . $field_type);
$plugin = NULL;
if ($plugin_config && $plugin_config['type'] != 'hidden') {
$plugin = $this->diffBuilderManager->createInstance($plugin_config['type'], $plugin_config['settings']);
}
if ($plugin) {
// Configurable field. It is the responsibility of the class extending
// this class to hide some configurable fields from comparison. This
// class compares all configurable fields.
if (!array_key_exists($field_items->getName(), $entity_base_fields)) {
$build = $plugin->build($field_items);
if (!empty($build)) {
$result[$field_items->getName()] = $build;
}
} else {
// Check if this field needs to be compared.
$config_key = 'entity.' . $entity_type_id . '.' . $field_items->getName();
$enabled = $this->config->get($config_key);
if ($enabled) {
$build = $plugin->build($field_items);
if (!empty($build)) {
$result[$field_items->getName()] = $build;
}
}
}
}
}
return $result;
}
/**
* Returns a plugin object or NULL if no plugin could be found.
*/
protected function getPlugin($configuration)
{
$plugin = NULL;
if ($configuration && isset($configuration['type']) && $configuration['type'] != 'hidden') {
if (!isset($configuration['settings'])) {
$configuration['settings'] = array();
}
$plugin = $this->diffBuilderManager->createInstance($configuration['type'], $configuration['settings']);
}
return $plugin;
}