CommentLinkBuilder::buildCommentedEntityLinks

public CommentLinkBuilder::buildCommentedEntityLinks(FieldableEntityInterface $entity, array &$context)

public function buildCommentedEntityLinks(FieldableEntityInterface $entity, array &$context) {
  $entity_links = array();
  $view_mode = $context['view_mode'];
  if ($view_mode == 'search_index' || $view_mode == 'search_result' || $view_mode == 'print' || $view_mode == 'rss') {
    // Do not add any links if the entity is displayed for:
    // - search indexing.
    // - constructing a search result excerpt.
    // - print.
    // - rss.
    return array();
  }

  $fields = $this->commentManager->getFields($entity->getEntityTypeId());
  foreach ($fields as $field_name => $detail) {
    // Skip fields that the entity does not have.
    if (!$entity->hasField($field_name)) {
      continue;
    }
    $links = array();
    $commenting_status = $entity->get($field_name)->status;
    if ($commenting_status != CommentItemInterface::HIDDEN) {
      // Entity has commenting status open or closed.
      $field_definition = $entity->getFieldDefinition($field_name);
      if ($view_mode == 'teaser') {
        // Teaser view: display the number of comments that have been posted,
        // or a link to add new comments if the user has permission, the
        // entity is open to new comments, and there currently are none.
        if ($this->currentUser->hasPermission('access comments')) {
          if (!empty($entity->get($field_name)->comment_count)) {
            $links['comment-comments'] = array(
              'title' => $this->formatPlural($entity->get($field_name)->comment_count, '1 comment', '@count comments'),
              'attributes' => array('title' => $this->t('Jump to the first comment.')),
              'fragment' => 'comments',
              'url' => $entity->urlInfo(),
            );
            if ($this->moduleHandler->moduleExists('history')) {
              $links['comment-new-comments'] = array(
                'title' => '',
                'url' => Url::fromRoute('<current>'),
                'attributes' => array(
                  'class' => 'hidden',
                  'title' => $this->t('Jump to the first new comment.'),
                  'data-history-node-last-comment-timestamp' => $entity->get($field_name)->last_comment_timestamp,
                  'data-history-node-field-name' => $field_name,
                ),
              );
            }
          }
        }
        // Provide a link to new comment form.
        if ($commenting_status == CommentItemInterface::OPEN) {
          $comment_form_location = $field_definition->getSetting('form_location');
          if ($this->currentUser->hasPermission('post comments')) {
            $links['comment-add'] = array(
              'title' => $this->t('Add new comment'),
              'language' => $entity->language(),
              'attributes' => array('title' => $this->t('Share your thoughts and opinions.')),
              'fragment' => 'comment-form',
            );
            if ($comment_form_location == CommentItemInterface::FORM_SEPARATE_PAGE) {
              $links['comment-add']['url'] = Url::fromRoute('comment.reply', [
                'entity_type' => $entity->getEntityTypeId(),
                'entity' => $entity->id(),
                'field_name' => $field_name,
              ]);
            }
            else {
              $links['comment-add'] += ['url' => $entity->urlInfo()];
            }
          }
          elseif ($this->currentUser->isAnonymous()) {
            $links['comment-forbidden'] = array(
              'title' => $this->commentManager->forbiddenMessage($entity, $field_name),
            );
          }
        }
      }
      else {
        // Entity in other view modes: add a "post comment" link if the user
        // is allowed to post comments and if this entity is allowing new
        // comments.
        if ($commenting_status == CommentItemInterface::OPEN) {
          $comment_form_location = $field_definition->getSetting('form_location');
          if ($this->currentUser->hasPermission('post comments')) {
            // Show the "post comment" link if the form is on another page, or
            // if there are existing comments that the link will skip past.
            if ($comment_form_location == CommentItemInterface::FORM_SEPARATE_PAGE || (!empty($entity->get($field_name)->comment_count) && $this->currentUser->hasPermission('access comments'))) {
              $links['comment-add'] = array(
                'title' => $this->t('Add new comment'),
                'attributes' => array('title' => $this->t('Share your thoughts and opinions.')),
                'fragment' => 'comment-form',
              );
              if ($comment_form_location == CommentItemInterface::FORM_SEPARATE_PAGE) {
                $links['comment-add']['url'] = Url::fromRoute('comment.reply', [
                  'entity_type' => $entity->getEntityTypeId(),
                  'entity' => $entity->id(),
                  'field_name' => $field_name,
                ]);
              }
              else {
                $links['comment-add']['url'] = $entity->urlInfo();
              }
            }
          }
          elseif ($this->currentUser->isAnonymous()) {
            $links['comment-forbidden'] = array(
              'title' => $this->commentManager->forbiddenMessage($entity, $field_name),
            );
          }
        }
      }
    }

    if (!empty($links)) {
      $entity_links['comment__' . $field_name] = array(
        '#theme' => 'links__entity__comment__' . $field_name,
        '#links' => $links,
        '#attributes' => array('class' => array('links', 'inline')),
      );
      if ($view_mode == 'teaser' && $this->moduleHandler->moduleExists('history') && $this->currentUser->isAuthenticated()) {
        $entity_links['comment__' . $field_name]['#cache']['contexts'][] = 'user';
        $entity_links['comment__' . $field_name]['#attached']['library'][] = 'comment/drupal.node-new-comments-link';
        // Embed the metadata for the "X new comments" link (if any) on this
        // entity.
        $entity_links['comment__' . $field_name]['#attached']['drupalSettings']['history']['lastReadTimestamps'][$entity->id()] = (int) history_read($entity->id());
        $new_comments = $this->commentManager->getCountNewComments($entity);
        if ($new_comments > 0) {
          $page_number = $this->entityManager
            ->getStorage('comment')
            ->getNewCommentPageNumber($entity->{$field_name}->comment_count, $new_comments, $entity, $field_name);
          $query = $page_number ? ['page' => $page_number] : NULL;
          $value = [
            'new_comment_count' => (int) $new_comments,
            'first_new_comment_link' => $entity->url('canonical', [
              'query' => $query,
              'fragment' => 'new',
            ]),
          ];
          $parents = ['comment', 'newCommentsLinks', $entity->getEntityTypeId(), $field_name, $entity->id()];
          NestedArray::setValue($entity_links['comment__' . $field_name]['#attached']['drupalSettings'], $parents, $value);
        }
      }
    }
  }
  return $entity_links;
}