class FileViewsHooks

class FileViewsHooks {
    
    /**
     * Implements hook_field_views_data().
     *
     * Views integration for file fields. Adds a file relationship to the default
     * field data.
     *
     * @see views_field_default_views_data()
     */
    public function fieldViewsData(FieldStorageConfigInterface $field_storage) : array {
        $data = views_field_default_views_data($field_storage);
        foreach ($data as $table_name => $table_data) {
            // Add the relationship only on the fid field.
            $data[$table_name][$field_storage->getName() . '_target_id']['relationship'] = [
                'id' => 'standard',
                'base' => 'file_managed',
                'entity type' => 'file',
                'base field' => 'fid',
                'label' => t('file from @field_name', [
                    '@field_name' => $field_storage->getName(),
                ]),
            ];
        }
        return $data;
    }
    
    /**
     * Implements hook_field_views_data_views_data_alter().
     *
     * Views integration to provide reverse relationships on file fields.
     */
    public function fieldViewsDataViewsDataAlter(array &$data, FieldStorageConfigInterface $field_storage) : void {
        $entity_type_id = $field_storage->getTargetEntityTypeId();
        $entity_type_manager = \Drupal::entityTypeManager();
        $entity_type = $entity_type_manager->getDefinition($entity_type_id);
        $field_name = $field_storage->getName();
        $pseudo_field_name = 'reverse_' . $field_name . '_' . $entity_type_id;
        
        /** @var \Drupal\Core\Entity\Sql\DefaultTableMapping $table_mapping */
        $table_mapping = $entity_type_manager->getStorage($entity_type_id)
            ->getTableMapping();
        [
            $label,
        ] = views_entity_field_label($entity_type_id, $field_name);
        $data['file_managed'][$pseudo_field_name]['relationship'] = [
            'title' => t('@entity using @field', [
                '@entity' => $entity_type->getLabel(),
                '@field' => $label,
            ]),
            'label' => t('@field_name', [
                '@field_name' => $field_name,
            ]),
            'group' => $entity_type->getLabel(),
            'help' => t('Relate each @entity with a @field set to the file.', [
                '@entity' => $entity_type->getLabel(),
                '@field' => $label,
            ]),
            'id' => 'entity_reverse',
            'base' => $entity_type->getDataTable() ?: $entity_type->getBaseTable(),
            'entity_type' => $entity_type_id,
            'base field' => $entity_type->getKey('id'),
            'field_name' => $field_name,
            'field table' => $table_mapping->getDedicatedDataTableName($field_storage),
            'field field' => $field_name . '_target_id',
            'join_extra' => [
                0 => [
                    'field' => 'deleted',
                    'value' => 0,
                    'numeric' => TRUE,
                ],
            ],
        ];
    }

}