class ConfigTranslationMapperList

class ConfigTranslationMapperList extends ControllerBase {
    
    /**
     * An array of configuration mapper instances.
     *
     * @var \Drupal\config_translation\ConfigMapperInterface[]
     */
    protected $mappers;
    
    /**
     * Constructs a new ConfigTranslationMapperList object.
     *
     * @param \Drupal\config_translation\ConfigMapperInterface[] $mappers
     *   The configuration mapper manager.
     */
    public function __construct(array $mappers) {
        $this->mappers = $mappers;
    }
    
    /**
     * {@inheritdoc}
     */
    public static function create(ContainerInterface $container) {
        return new static($container->get('plugin.manager.config_translation.mapper')
            ->getMappers());
    }
    
    /**
     * Builds the mappers as a renderable array for table.html.twig.
     *
     * @return array
     *   Renderable array with config translation mappers.
     */
    public function render() {
        $build = [
            '#type' => 'table',
            '#header' => $this->buildHeader(),
            '#rows' => [],
        ];
        $mappers = [];
        foreach ($this->mappers as $mapper) {
            if ($row = $this->buildRow($mapper)) {
                $mappers[$mapper->getWeight()][] = $row;
            }
        }
        // Group by mapper weight and sort by label.
        ksort($mappers);
        foreach ($mappers as $weight => $mapper) {
            usort($mapper, function ($a, $b) {
                $a_title = isset($a['label']) ? $a['label'] : '';
                $b_title = isset($b['label']) ? $b['label'] : '';
                return strnatcasecmp($a_title, $b_title);
            });
            $mappers[$weight] = $mapper;
        }
        $build['#rows'] = array_merge(...$mappers);
        return $build;
    }
    
    /**
     * Builds a row for a mapper in the mapper listing.
     *
     * @param \Drupal\config_translation\ConfigMapperInterface $mapper
     *   The mapper.
     *
     * @return array
     *   A render array structure of fields for this mapper.
     */
    public function buildRow(ConfigMapperInterface $mapper) {
        $row['label'] = $mapper->getTypeLabel();
        $row['operations']['data'] = $this->buildOperations($mapper);
        return $row;
    }
    
    /**
     * Builds the header row for the mapper listing.
     *
     * @return array
     *   A render array structure of header strings.
     */
    public function buildHeader() {
        $row['Label'] = $this->t('Label');
        $row['operations'] = $this->t('Operations');
        return $row;
    }
    
    /**
     * Builds a renderable list of operation links for the entity.
     *
     * @param \Drupal\config_translation\ConfigMapperInterface $mapper
     *   The mapper.
     *
     * @return array
     *   A renderable array of operation links.
     *
     * @see \Drupal\Core\Entity\EntityList::buildOperations()
     */
    protected function buildOperations(ConfigMapperInterface $mapper) {
        // Retrieve and sort operations.
        $operations = $mapper->getOperations();
        uasort($operations, 'Drupal\\Component\\Utility\\SortArray::sortByWeightElement');
        $build = [
            '#type' => 'operations',
            '#links' => $operations,
        ];
        return $build;
    }

}