LinkApprove.php

<?php

/**
 * @file
 * Definition of Drupal\comment\Plugin\views\field\LinkApprove.
 */
namespace Drupal\comment\Plugin\views\field;

use Drupal\Component\Annotation\PluginID;

/**
 * Provides a comment approve link.
 *
 * @ingroup views_field_handlers
 *
 * @PluginID("comment_link_approve")
 */
class LinkApprove extends Link {
  public function access() {

    //needs permission to administer comments in general
    return user_access('administer comments');
  }
  function render_link($data, $values) {
    $status = $this
      ->getValue($values, 'status');

    // Don't show an approve link on published nodes.
    if ($status == COMMENT_PUBLISHED) {
      return;
    }
    $text = !empty($this->options['text']) ? $this->options['text'] : t('approve');
    $cid = $this
      ->getValue($values, 'cid');
    $this->options['alter']['make_link'] = TRUE;
    $this->options['alter']['path'] = "comment/" . $cid . "/approve";
    $this->options['alter']['query'] = drupal_get_destination() + array(
      'token' => drupal_get_token("comment/{$cid}/approve"),
    );
    return $text;
  }

}