EntityChangesDetectionTrait.php

<?php

namespace Drupal\Core\Entity;


/**
 * Provides helper methods to detect changes in an entity object.
 *
 * @internal This may be replaced by a proper entity comparison handler.
 */
trait EntityChangesDetectionTrait {
    
    /**
     * Returns an array of field names to skip when checking for changes.
     *
     * @param \Drupal\Core\Entity\ContentEntityInterface $entity
     *   A content entity object.
     *
     * @return string[]
     *   An array of field names.
     */
    protected function getFieldsToSkipFromTranslationChangesCheck(ContentEntityInterface $entity) {
        
        /** @var \Drupal\Core\Entity\ContentEntityTypeInterface $entity_type */
        $entity_type = $entity->getEntityType();
        // A list of known revision metadata fields which should be skipped from
        // the comparison.
        $fields = [
            $entity_type->getKey('revision'),
            $entity_type->getKey('revision_translation_affected'),
        ];
        $fields = array_merge($fields, array_values($entity_type->getRevisionMetadataKeys()));
        // Computed fields should be skipped by the check for translation changes.
        foreach (array_diff_key($entity->getFieldDefinitions(), array_flip($fields)) as $field_name => $field_definition) {
            if ($field_definition->isComputed()) {
                $fields[] = $field_name;
            }
        }
        return $fields;
    }

}