function template_preprocess_comment

Prepares variables for comment templates.

By default this function performs special preprocessing of some base fields so they are available as variables in the template. For example 'subject' appears as 'title'. This preprocessing is skipped if:

• a module makes the field's display configurable via the field UI by means of BaseFieldDefinition::setDisplayConfigurable()
• AND the additional entity type property 'enable_base_field_custom_preprocess_skipping' has been set using hook_entity_type_build().

Default template: comment.html.twig.

Parameters

array $variables: An associative array containing:

• elements: An associative array containing the comment and entity objects. Array keys: #comment, #commented_entity.

File

core/modules/comment/comment.module, line 576

Code

function template_preprocess_comment(&$variables) {
    
    /** @var \Drupal\Core\Datetime\DateFormatterInterface $date_formatter */
    $date_formatter = \Drupal::service('date.formatter');
    
    /** @var \Drupal\comment\CommentInterface $comment */
    $comment = $variables['elements']['#comment'];
    $commented_entity = $comment->getCommentedEntity();
    $variables['comment'] = $comment;
    $variables['commented_entity'] = $commented_entity;
    $variables['threaded'] = $variables['elements']['#comment_threaded'];
    $skip_custom_preprocessing = $comment->getEntityType()
        ->get('enable_base_field_custom_preprocess_skipping');
    // Make created, uid, pid and subject fields available separately. Skip this
    // custom preprocessing if the field display is configurable and skipping has
    // been enabled.
    // @todo https://www.drupal.org/project/drupal/issues/3015623
    //   Eventually delete this code and matching template lines. Using
    //   $variables['content'] is more flexible and consistent.
    $submitted_configurable = $comment->getFieldDefinition('created')
        ->isDisplayConfigurable('view') || $comment->getFieldDefinition('uid')
        ->isDisplayConfigurable('view');
    if (!$skip_custom_preprocessing || !$submitted_configurable) {
        $account = $comment->getOwner();
        $username = [
            '#theme' => 'username',
            '#account' => $account,
        ];
        $variables['author'] = \Drupal::service('renderer')->render($username);
        $variables['author_id'] = $comment->getOwnerId();
        $variables['new_indicator_timestamp'] = $comment->getChangedTime();
        $variables['created'] = $date_formatter->format($comment->getCreatedTime());
        // Avoid calling DateFormatterInterface::format() twice on the same timestamp.
        if ($comment->getChangedTime() == $comment->getCreatedTime()) {
            $variables['changed'] = $variables['created'];
        }
        else {
            $variables['changed'] = $date_formatter->format($comment->getChangedTime());
        }
        if (theme_get_setting('features.comment_user_picture')) {
            // To change user picture settings (for instance, image style), edit the
            // 'compact' view mode on the User entity.
            $variables['user_picture'] = \Drupal::entityTypeManager()->getViewBuilder('user')
                ->view($account, 'compact');
        }
        else {
            $variables['user_picture'] = [];
        }
        $variables['submitted'] = t('Submitted by @username on @datetime', [
            '@username' => $variables['author'],
            '@datetime' => $variables['created'],
        ]);
    }
    if (isset($comment->in_preview)) {
        $variables['permalink'] = Link::fromTextAndUrl(t('Permalink'), Url::fromRoute('<front>'))->toString();
    }
    else {
        $variables['permalink'] = Link::fromTextAndUrl(t('Permalink'), $comment->permalink())
            ->toString();
    }
    if (($comment_parent = $comment->getParentComment()) && (!$skip_custom_preprocessing || !$comment->getFieldDefinition('pid')
        ->isDisplayConfigurable('view'))) {
        // Fetch and store the parent comment information for use in templates.
        $account_parent = $comment_parent->getOwner();
        $variables['parent_comment'] = $comment_parent;
        $username = [
            '#theme' => 'username',
            '#account' => $account_parent,
        ];
        $variables['parent_author'] = \Drupal::service('renderer')->render($username);
        $variables['parent_created'] = $date_formatter->format($comment_parent->getCreatedTime());
        // Avoid calling DateFormatterInterface::format() twice on same timestamp.
        if ($comment_parent->getChangedTime() == $comment_parent->getCreatedTime()) {
            $variables['parent_changed'] = $variables['parent_created'];
        }
        else {
            $variables['parent_changed'] = $date_formatter->format($comment_parent->getChangedTime());
        }
        $permalink_uri_parent = $comment_parent->permalink();
        $attributes = $permalink_uri_parent->getOption('attributes') ?: [];
        $attributes += [
            'class' => [
                'permalink',
            ],
            'rel' => 'bookmark',
        ];
        $permalink_uri_parent->setOption('attributes', $attributes);
        $variables['parent_title'] = Link::fromTextAndUrl($comment_parent->getSubject(), $permalink_uri_parent)
            ->toString();
        $variables['parent_permalink'] = Link::fromTextAndUrl(t('Parent permalink'), $permalink_uri_parent)->toString();
        $variables['parent'] = t('In reply to @parent_title by @parent_username', [
            '@parent_username' => $variables['parent_author'],
            '@parent_title' => $variables['parent_title'],
        ]);
    }
    else {
        $variables['parent_comment'] = '';
        $variables['parent_author'] = '';
        $variables['parent_created'] = '';
        $variables['parent_changed'] = '';
        $variables['parent_title'] = '';
        $variables['parent_permalink'] = '';
        $variables['parent'] = '';
    }
    if (!$skip_custom_preprocessing || !$comment->getFieldDefinition('subject')
        ->isDisplayConfigurable('view')) {
        if (isset($comment->in_preview)) {
            $variables['title'] = Link::fromTextAndUrl($comment->getSubject(), Url::fromRoute('<front>'))
                ->toString();
        }
        else {
            $uri = $comment->permalink();
            $attributes = $uri->getOption('attributes') ?: [];
            $attributes += [
                'class' => [
                    'permalink',
                ],
                'rel' => 'bookmark',
            ];
            $uri->setOption('attributes', $attributes);
            $variables['title'] = Link::fromTextAndUrl($comment->getSubject(), $uri)
                ->toString();
        }
    }
    // Helpful $content variable for templates.
    foreach (Element::children($variables['elements']) as $key) {
        $variables['content'][$key] = $variables['elements'][$key];
    }
    // Set status to a string representation of comment->status.
    if (isset($comment->in_preview)) {
        $variables['status'] = 'preview';
    }
    else {
        $variables['status'] = $comment->isPublished() ? 'published' : 'unpublished';
    }
    // Add comment author user ID. Necessary for the comment-by-viewer library.
    $variables['attributes']['data-comment-user-id'] = $comment->getOwnerId();
    // Add anchor for each comment.
    $variables['attributes']['id'] = 'comment-' . $comment->id();
}