class ContentTranslationPermissions

class ContentTranslationPermissions implements ContainerInjectionInterface {
    use StringTranslationTrait;
    
    /**
     * The entity type manager.
     *
     * @var \Drupal\Core\Entity\EntityTypeManagerInterface
     */
    protected $entityTypeManager;
    
    /**
     * The entity bundle info.
     *
     * @var \Drupal\Core\Entity\EntityTypeBundleInfoInterface
     */
    protected $entityTypeBundleInfo;
    
    /**
     * The content translation manager.
     *
     * @var \Drupal\content_translation\ContentTranslationManagerInterface
     */
    protected $contentTranslationManager;
    
    /**
     * Constructs a ContentTranslationPermissions instance.
     *
     * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
     *   The entity type manager.
     * @param \Drupal\content_translation\ContentTranslationManagerInterface $content_translation_manager
     *   The content translation manager.
     * @param \Drupal\Core\Entity\EntityTypeBundleInfoInterface $entity_type_bundle_info
     *   The entity type bundle info.
     */
    public function __construct(EntityTypeManagerInterface $entity_type_manager, ContentTranslationManagerInterface $content_translation_manager, EntityTypeBundleInfoInterface $entity_type_bundle_info) {
        $this->entityTypeManager = $entity_type_manager;
        $this->contentTranslationManager = $content_translation_manager;
        $this->entityTypeBundleInfo = $entity_type_bundle_info;
    }
    
    /**
     * {@inheritdoc}
     */
    public static function create(ContainerInterface $container) {
        return new static($container->get('entity_type.manager'), $container->get('content_translation.manager'), $container->get('entity_type.bundle.info'));
    }
    
    /**
     * Returns an array of content translation permissions.
     *
     * @return array
     */
    public function contentPermissions() {
        $permissions = [];
        // Create a translate permission for each enabled entity type and (optionally)
        // bundle.
        foreach ($this->entityTypeManager
            ->getDefinitions() as $entity_type_id => $entity_type) {
            if ($permission_granularity = $entity_type->getPermissionGranularity()) {
                switch ($permission_granularity) {
                    case 'bundle':
                        foreach ($this->entityTypeBundleInfo
                            ->getBundleInfo($entity_type_id) as $bundle => $bundle_info) {
                            if ($this->contentTranslationManager
                                ->isEnabled($entity_type_id, $bundle)) {
                                $permissions["translate {$bundle} {$entity_type_id}"] = $this->buildBundlePermission($entity_type, $bundle, $bundle_info);
                            }
                        }
                        break;
                    case 'entity_type':
                        if ($this->contentTranslationManager
                            ->isEnabled($entity_type_id)) {
                            $permissions["translate {$entity_type_id}"] = [
                                'title' => $this->t('Translate @entity_label', [
                                    '@entity_label' => $entity_type->getSingularLabel(),
                                ]),
                                'dependencies' => [
                                    'module' => [
                                        $entity_type->getProvider(),
                                    ],
                                ],
                            ];
                        }
                        break;
                }
            }
        }
        return $permissions;
    }
    
    /**
     * Builds a content translation permission array for a bundle.
     *
     * @param \Drupal\Core\Entity\EntityTypeInterface $entity_type
     *   The entity type.
     * @param string $bundle
     *   The bundle to build the translation permission for.
     * @param array $bundle_info
     *   The bundle info.
     *
     * @return array
     *   The permission details, keyed by 'title' and 'dependencies'.
     */
    private function buildBundlePermission(EntityTypeInterface $entity_type, string $bundle, array $bundle_info) {
        $permission = [
            'title' => $this->t('Translate %bundle_label @entity_label', [
                '@entity_label' => $entity_type->getSingularLabel(),
                '%bundle_label' => $bundle_info['label'] ?? $bundle,
            ]),
        ];
        // If the entity type uses bundle entities, add a dependency on the bundle.
        $bundle_entity_type = $entity_type->getBundleEntityType();
        if ($bundle_entity_type && ($bundle_entity = $this->entityTypeManager
            ->getStorage($bundle_entity_type)
            ->load($bundle))) {
            $permission['dependencies'][$bundle_entity->getConfigDependencyKey()][] = $bundle_entity->getConfigDependencyName();
        }
        else {
            $permission['dependencies']['module'][] = $entity_type->getProvider();
        }
        return $permission;
    }

}