class CommentAdminOverview

class CommentAdminOverview extends FormBase {
    
    /**
     * The entity type manager.
     *
     * @var \Drupal\Core\Entity\EntityTypeManagerInterface
     */
    protected $entityTypeManager;
    
    /**
     * The comment storage.
     *
     * @var \Drupal\comment\CommentStorageInterface
     */
    protected $commentStorage;
    
    /**
     * The date formatter service.
     *
     * @var \Drupal\Core\Datetime\DateFormatterInterface
     */
    protected $dateFormatter;
    
    /**
     * The module handler.
     *
     * @var \Drupal\Core\Extension\ModuleHandlerInterface
     */
    protected $moduleHandler;
    
    /**
     * The tempstore factory.
     *
     * @var \Drupal\Core\TempStore\PrivateTempStoreFactory
     */
    protected $tempStoreFactory;
    
    /**
     * Creates a CommentAdminOverview form.
     *
     * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
     *   The entity type manager service.
     * @param \Drupal\Core\Datetime\DateFormatterInterface $date_formatter
     *   The date formatter service.
     * @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
     *   The module handler.
     * @param \Drupal\Core\TempStore\PrivateTempStoreFactory $temp_store_factory
     *   The tempstore factory.
     */
    public function __construct(EntityTypeManagerInterface $entity_type_manager, DateFormatterInterface $date_formatter, ModuleHandlerInterface $module_handler, PrivateTempStoreFactory $temp_store_factory) {
        $this->entityTypeManager = $entity_type_manager;
        $this->commentStorage = $entity_type_manager->getStorage('comment');
        $this->dateFormatter = $date_formatter;
        $this->moduleHandler = $module_handler;
        $this->tempStoreFactory = $temp_store_factory;
    }
    
    /**
     * {@inheritdoc}
     */
    public static function create(ContainerInterface $container) {
        return new static($container->get('entity_type.manager'), $container->get('date.formatter'), $container->get('module_handler'), $container->get('tempstore.private'));
    }
    
    /**
     * {@inheritdoc}
     */
    public function getFormId() {
        return 'comment_admin_overview';
    }
    
    /**
     * Form constructor for the comment overview administration form.
     *
     * @param array $form
     *   An associative array containing the structure of the form.
     * @param \Drupal\Core\Form\FormStateInterface $form_state
     *   The current state of the form.
     * @param string $type
     *   The type of the overview form ('approval' or 'new').
     *
     * @return array
     *   The form structure.
     */
    public function buildForm(array $form, FormStateInterface $form_state, $type = 'new') {
        // Build an 'Update options' form.
        $form['options'] = [
            '#type' => 'details',
            '#title' => $this->t('Update options'),
            '#open' => TRUE,
            '#attributes' => [
                'class' => [
                    'container-inline',
                ],
            ],
        ];
        if ($type == 'approval') {
            $options['publish'] = $this->t('Publish the selected comments');
        }
        else {
            $options['unpublish'] = $this->t('Unpublish the selected comments');
        }
        $options['delete'] = $this->t('Delete the selected comments');
        $form['options']['operation'] = [
            '#type' => 'select',
            '#title' => $this->t('Action'),
            '#title_display' => 'invisible',
            '#options' => $options,
            '#default_value' => 'publish',
        ];
        $form['options']['submit'] = [
            '#type' => 'submit',
            '#value' => $this->t('Update'),
        ];
        // Load the comments that need to be displayed.
        $status = $type == 'approval' ? CommentInterface::NOT_PUBLISHED : CommentInterface::PUBLISHED;
        $header = [
            'subject' => [
                'data' => $this->t('Subject'),
                'specifier' => 'subject',
            ],
            'author' => [
                'data' => $this->t('Author'),
                'specifier' => 'name',
                'class' => [
                    RESPONSIVE_PRIORITY_MEDIUM,
                ],
            ],
            'posted_in' => [
                'data' => $this->t('Posted in'),
                'class' => [
                    RESPONSIVE_PRIORITY_LOW,
                ],
            ],
            'changed' => [
                'data' => $this->t('Updated'),
                'specifier' => 'changed',
                'sort' => 'desc',
                'class' => [
                    RESPONSIVE_PRIORITY_LOW,
                ],
            ],
            'operations' => $this->t('Operations'),
        ];
        $cids = $this->commentStorage
            ->getQuery()
            ->accessCheck(TRUE)
            ->condition('status', $status)
            ->tableSort($header)
            ->pager(50)
            ->execute();
        
        /** @var \Drupal\comment\CommentInterface[] $comments */
        $comments = $this->commentStorage
            ->loadMultiple($cids);
        // Build a table listing the appropriate comments.
        $options = [];
        $destination = $this->getDestinationArray();
        $commented_entity_ids = [];
        $commented_entities = [];
        foreach ($comments as $comment) {
            $commented_entity_ids[$comment->getCommentedEntityTypeId()][] = $comment->getCommentedEntityId();
        }
        foreach ($commented_entity_ids as $entity_type => $ids) {
            $commented_entities[$entity_type] = $this->entityTypeManager
                ->getStorage($entity_type)
                ->loadMultiple($ids);
        }
        foreach ($comments as $comment) {
            
            /** @var \Drupal\Core\Entity\EntityInterface $commented_entity */
            $commented_entity = $commented_entities[$comment->getCommentedEntityTypeId()][$comment->getCommentedEntityId()];
            $comment_permalink = $comment->permalink();
            if ($comment->hasField('comment_body') && ($body = $comment->get('comment_body')->value)) {
                $attributes = $comment_permalink->getOption('attributes') ?: [];
                $attributes += [
                    'title' => Unicode::truncate($body, 128),
                ];
                $comment_permalink->setOption('attributes', $attributes);
            }
            $options[$comment->id()] = [
                'title' => [
                    'data' => [
                        '#title' => $comment->getSubject() ?: $comment->id(),
                    ],
                ],
                'subject' => [
                    'data' => [
                        '#type' => 'link',
                        '#title' => $comment->getSubject(),
                        '#url' => $comment_permalink,
                    ],
                ],
                'author' => [
                    'data' => [
                        '#theme' => 'username',
                        '#account' => $comment->getOwner(),
                    ],
                ],
                'posted_in' => [
                    'data' => [
                        '#type' => 'link',
                        '#title' => $commented_entity->label(),
                        '#access' => $commented_entity->access('view'),
                        '#url' => $commented_entity->toUrl(),
                    ],
                ],
                'changed' => $this->dateFormatter
                    ->format($comment->getChangedTimeAcrossTranslations(), 'short'),
            ];
            $comment_uri_options = $comment->toUrl()
                ->getOptions() + [
                'query' => $destination,
            ];
            $links = [];
            $links['edit'] = [
                'title' => $this->t('Edit'),
                'url' => $comment->toUrl('edit-form', $comment_uri_options),
            ];
            if ($this->moduleHandler
                ->moduleExists('content_translation') && content_translation_translate_access($comment)->isAllowed()) {
                $links['translate'] = [
                    'title' => $this->t('Translate'),
                    'url' => $comment->toUrl('drupal:content-translation-overview', $comment_uri_options),
                ];
            }
            $options[$comment->id()]['operations']['data'] = [
                '#type' => 'operations',
                '#links' => $links,
            ];
        }
        $form['comments'] = [
            '#type' => 'tableselect',
            '#header' => $header,
            '#options' => $options,
            '#empty' => $this->t('No comments available.'),
        ];
        $form['pager'] = [
            '#type' => 'pager',
        ];
        return $form;
    }
    
    /**
     * {@inheritdoc}
     */
    public function validateForm(array &$form, FormStateInterface $form_state) {
        $form_state->setValue('comments', array_diff($form_state->getValue('comments'), [
            0,
        ]));
        // We can't execute any 'Update options' if no comments were selected.
        if (count($form_state->getValue('comments')) == 0) {
            $form_state->setErrorByName('', $this->t('Select one or more comments to perform the update on.'));
        }
    }
    
    /**
     * {@inheritdoc}
     */
    public function submitForm(array &$form, FormStateInterface $form_state) {
        $operation = $form_state->getValue('operation');
        $cids = $form_state->getValue('comments');
        
        /** @var \Drupal\comment\CommentInterface[] $comments */
        $comments = $this->commentStorage
            ->loadMultiple($cids);
        if ($operation != 'delete') {
            foreach ($comments as $comment) {
                if ($operation == 'unpublish') {
                    $comment->setUnpublished();
                }
                elseif ($operation == 'publish') {
                    $comment->setPublished();
                }
                $comment->save();
            }
            $this->messenger()
                ->addStatus($this->t('The update has been performed.'));
            $form_state->setRedirect('comment.admin');
        }
        else {
            $info = [];
            
            /** @var \Drupal\comment\CommentInterface $comment */
            foreach ($comments as $comment) {
                $langcode = $comment->language()
                    ->getId();
                $info[$comment->id()][$langcode] = $langcode;
            }
            $this->tempStoreFactory
                ->get('entity_delete_multiple_confirm')
                ->set($this->currentUser()
                ->id() . ':comment', $info);
            $form_state->setRedirect('entity.comment.delete_multiple_form');
        }
    }

}