LinkReply.php

<?php

namespace Drupal\comment\Plugin\views\field;

use Drupal\Core\Url;
use Drupal\views\Plugin\views\field\LinkBase;
use Drupal\views\ResultRow;

/**
 * Field handler to present a link to reply to a comment.
 *
 * @ingroup views_field_handlers
 *
 * @ViewsField("comment_link_reply")
 */
class LinkReply extends LinkBase {
    
    /**
     * {@inheritdoc}
     */
    protected function getUrlInfo(ResultRow $row) {
        
        /** @var \Drupal\comment\CommentInterface $comment */
        $comment = $this->getEntity($row);
        return Url::fromRoute('comment.reply', [
            'entity_type' => $comment->getCommentedEntityTypeId(),
            'entity' => $comment->getCommentedEntityId(),
            'field_name' => $comment->getFieldName(),
            'pid' => $comment->id(),
        ]);
    }
    
    /**
     * {@inheritdoc}
     */
    protected function getDefaultLabel() {
        return $this->t('Reply');
    }

}