CommentNodeFormatter.php in Open Social 8.8

Namespace

Drupal\social_core\Plugin\Field\FieldFormatter

File

modules/social_features/social_core/src/Plugin/Field/FieldFormatter/CommentNodeFormatter.php

<?php

namespace Drupal\social_core\Plugin\Field\FieldFormatter;

use Drupal\comment\Plugin\Field\FieldType\CommentItemInterface;
use Drupal\comment\Plugin\Field\FieldFormatter\CommentDefaultFormatter;
use Drupal\Core\Field\FieldItemListInterface;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Entity\EntityInterface;
use Drupal\comment\CommentManagerInterface;
use Drupal\comment\CommentInterface;
use Drupal\Core\Link;
use Drupal\group\Entity\GroupContent;

/**
 * Provides a node comment formatter.
 *
 * @FieldFormatter(
 *   id = "comment_node",
 *   module = "social_core",
 *   label = @Translation("Comment on node list"),
 *   field_types = {
 *     "comment"
 *   },
 *   quickedit = {
 *     "editor" = "disabled"
 *   }
 * )
 */
class CommentNodeFormatter extends CommentDefaultFormatter {

  /**
   * {@inheritdoc}
   */
  public static function defaultSettings() {
    return [
      'num_comments' => 2,
      'always_show_all_comments' => FALSE,
    ];
  }

  /**
   * {@inheritdoc}
   */
  public function viewElements(FieldItemListInterface $items, $langcode) {
    $elements = [];
    $output = [];
    $field_name = $this->fieldDefinition
      ->getName();
    $entity = $items
      ->getEntity();
    $status = $items->status;
    $access_comments_in_group = FALSE;

    // Exclude entities without the set id.
    if (!empty($entity
      ->id())) {
      $group_contents = GroupContent::loadByEntity($entity);
    }
    if (!empty($group_contents)) {

      // Add cache contexts.
      $elements['#cache']['contexts'][] = 'group.type';
      $elements['#cache']['contexts'][] = 'user.group_permissions';
      $account = \Drupal::currentUser();
      $renderer = \Drupal::service('renderer');
      foreach ($group_contents as $group_content) {
        $group = $group_content
          ->getGroup();
        $membership = $group
          ->getMember($account);
        $renderer
          ->addCacheableDependency($elements, $membership);
        if ($group
          ->hasPermission('access comments', $account)) {
          $access_comments_in_group = TRUE;
        }
      }
    }
    $comments_per_page = $this
      ->getSetting('num_comments');
    if ($access_comments_in_group && $status != CommentItemInterface::HIDDEN && empty($entity->in_preview) && !in_array($this->viewMode, [
      'search_result',
      'search_index',
    ])) {
      $comment_settings = $this
        ->getFieldSettings();
      $comment_count = $entity
        ->get($field_name)->comment_count;

      // Only attempt to render comments if the entity has visible comments.
      // Unpublished comments are not included in
      // $entity->get($field_name)->comment_count, but unpublished comments
      // should display if the user is an administrator.
      $elements['#cache']['contexts'][] = 'user.permissions';
      if ($this->currentUser
        ->hasPermission('access comments') || $this->currentUser
        ->hasPermission('administer comments')) {
        $output['comments'] = [];
        if ($comment_count || $this->currentUser
          ->hasPermission('administer comments')) {
          $mode = $comment_settings['default_mode'];
          $comments = $this
            ->loadThread($entity, $field_name, $mode, $comments_per_page, FALSE);
          if ($comments) {
            $build = $this->viewBuilder
              ->viewMultiple($comments);
            $output['comments'] += $build;
          }
        }

        // Prepare the show all comments link.
        $t_args = [
          ':num_comments' => $comment_count,
        ];

        // Set link classes to be added to the button.
        $more_link_options = [
          'attributes' => [
            'class' => [
              'btn',
              'btn-flat',
              'brand-text-primary',
            ],
          ],
        ];

        // Set path to node.
        $link_url = $entity
          ->urlInfo('canonical');

        // Attach the attributes.
        $link_url
          ->setOptions($more_link_options);
        if ($comment_count == 0) {
          $more_link = $this
            ->t(':num_comments comments', $t_args);
          $output['more_link'] = $more_link;
        }
        elseif ($comment_count == 1) {
          $more_link = $this
            ->t(':num_comments comment', $t_args);
          $output['more_link'] = $more_link;
        }
        else {
          $more_link = $this
            ->t('Show all :num_comments comments', $t_args);
        }

        // Build the link.
        $more_button = Link::fromTextAndUrl($more_link, $link_url);
        $always_show_all_comments = $this
          ->getSetting('always_show_all_comments');
        if ($always_show_all_comments && $comment_count > 1) {
          $output['more_link'] = $more_button;
        }
        elseif ($comments_per_page && $comment_count > $comments_per_page) {
          $output['more_link'] = $more_button;
        }
      }
      $elements[] = $output + [
        '#comment_type' => $this
          ->getFieldSetting('comment_type'),
        '#comment_display_mode' => $this
          ->getFieldSetting('default_mode'),
        'comments' => [],
        'comment_form' => [],
        'more_link' => [],
      ];
    }
    return $elements;
  }

  /**
   * {@inheritdoc}
   */
  public function settingsForm(array $form, FormStateInterface $form_state) {
    $element = [];
    $element['num_comments'] = [
      '#type' => 'number',
      '#min' => 0,
      '#max' => 10,
      '#title' => $this
        ->t('Number of comments'),
      '#default_value' => $this
        ->getSetting('num_comments'),
    ];
    $element['always_show_all_comments'] = [
      '#type' => 'checkbox',
      '#title' => $this
        ->t('Always show all comments link'),
      '#description' => $this
        ->t('If selected it will show a "all comments" link if there is at least 1 comment.'),
      '#default_value' => $this
        ->getSetting('always_show_all_comments'),
    ];
    return $element;
  }

  /**
   * {@inheritdoc}
   */
  public function settingsSummary() {
    return [];
  }

  /**
   * {@inheritdoc}
   *
   * @see Drupal\comment\CommentStorage::loadThead()
   */
  public function loadThread(EntityInterface $entity, $field_name, $mode, $comments_per_page = 0, $pager_id = 0) {

    // @TODO: Refactor this to use CommentDefaultFormatter->loadThread with dependency injection instead.
    $query = db_select('comment_field_data', 'c');
    $query
      ->addField('c', 'cid');
    $query
      ->condition('c.entity_id', $entity
      ->id())
      ->condition('c.entity_type', $entity
      ->getEntityTypeId())
      ->condition('c.field_name', $field_name)
      ->condition('c.default_langcode', 1)
      ->isNull('c.pid')
      ->addTag('entity_access')
      ->addTag('comment_filter')
      ->addMetaData('base_table', 'comment')
      ->addMetaData('entity', $entity)
      ->addMetaData('field_name', $field_name);
    if (!$this->currentUser
      ->hasPermission('administer comments')) {
      $query
        ->condition('c.status', CommentInterface::PUBLISHED);
    }
    if ($mode == CommentManagerInterface::COMMENT_MODE_FLAT) {
      $query
        ->orderBy('c.cid', 'DESC');
    }
    else {

      // See comment above. Analysis reveals that this doesn't cost too
      // much. It scales much much better than having the whole comment
      // structure.
      $query
        ->addExpression('SUBSTRING(c.thread, 1, (LENGTH(c.thread) - 1))', 'torder');
      $query
        ->orderBy('torder', 'DESC');
    }

    // Limit The number of results.
    if ($comments_per_page) {
      $query
        ->range(0, $comments_per_page);
    }
    $cids = $query
      ->execute()
      ->fetchCol();
    $comments = [];
    if ($cids) {
      $comments = entity_load_multiple('comment', $cids);
    }
    return $comments;
  }

}

Classes

Name	Description
CommentNodeFormatter	Provides a node comment formatter.