rdf_preprocess_comment(&$variables)
Implements hook_preprocess_HOOK() for comment templates.
File
- core/modules/rdf/rdf.module, line 447
- Enables semantically enriched output for Drupal sites in the form of RDFa.
Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 | function rdf_preprocess_comment(&$variables) { $comment = $variables['comment']; $mapping = rdf_get_mapping('comment', $comment->bundle()); $bundle_mapping = $mapping->getPreparedBundleMapping(); if (!empty($bundle_mapping['types']) && !isset($comment->in_preview)) { // Adds RDFa markup to the comment container. The about attribute specifies // the URI of the resource described within the HTML element, while the // typeof attribute indicates its RDF type (e.g., sioc:Post, foaf:Document, // and so on.) $variables['attributes']['about'] = $comment->url(); $variables['attributes']['typeof'] = $bundle_mapping['types']; } // Adds RDFa markup for the relation between the comment and its author. $author_mapping = $mapping->getPreparedFieldMapping('uid'); if (!empty($author_mapping)) { $author_attributes = ['rel' => $author_mapping['properties']]; // Wraps the 'author' and 'submitted' variables which are both available in // comment.html.twig. $variables['author'] = [ '#theme' => 'rdf_wrapper', '#content' => $variables['author'], '#attributes' => $author_attributes, ]; $variables['submitted'] = [ '#theme' => 'rdf_wrapper', '#content' => $variables['submitted'], '#attributes' => $author_attributes, ]; } // Adds RDFa markup for the date of the comment. $created_mapping = $mapping->getPreparedFieldMapping('created'); if (!empty($created_mapping)) { // The comment date is precomputed as part of the rdf_data so that it can be // cached as part of the entity. $date_attributes = $comment->rdf_data['date']; $rdf_metadata = array( '#theme' => 'rdf_metadata', '#metadata' => array($date_attributes), ); // Ensure the original variable is represented as a render array. $created = !is_array($variables['created']) ? ['#markup' => $variables['created']] : $variables['created']; $submitted = !is_array($variables['submitted']) ? ['#markup' => $variables['submitted']] : $variables['submitted']; // Make render array and RDF metadata available in comment.html.twig. $variables['created'] = [$created, $rdf_metadata]; $variables['submitted'] = [$submitted, $rdf_metadata]; } $title_mapping = $mapping->getPreparedFieldMapping('subject'); if (!empty($title_mapping)) { // Adds RDFa markup to the subject of the comment. Because the RDFa markup // is added to an <h3> tag which might contain HTML code, we specify an // empty datatype to ensure the value of the title read by the RDFa parsers // is a literal. $variables['title_attributes']['property'] = $title_mapping['properties']; $variables['title_attributes']['datatype'] = ''; } // Annotates the parent relationship between the current comment and the node // it belongs to. If available, the parent comment is also annotated. // @todo When comments are turned into fields, this should be changed. // Currently there is no mapping relating a comment to its node. $pid_mapping = $mapping->getPreparedFieldMapping('pid'); if (!empty($pid_mapping)) { // Adds the relation to the parent entity. $parent_entity_attributes['rel'] = $pid_mapping['properties']; // The parent entity URI is precomputed as part of the rdf_data so that it // can be cached as part of the entity. $parent_entity_attributes['resource'] = $comment->rdf_data['entity_uri']; $variables['rdf_metadata_attributes'][] = $parent_entity_attributes; // Adds the relation to parent comment, if it exists. if ($comment->hasParentComment()) { $parent_comment_attributes['rel'] = $pid_mapping['properties']; // The parent comment URI is precomputed as part of the rdf_data so that // it can be cached as part of the entity. $parent_comment_attributes['resource'] = $comment->rdf_data['pid_uri']; $variables['rdf_metadata_attributes'][] = $parent_comment_attributes; } } // Adds RDF metadata markup above comment body if any. if (!empty($variables['rdf_metadata_attributes']) && isset($variables['content']['comment_body'])) { $rdf_metadata = array( '#theme' => 'rdf_metadata', '#metadata' => $variables['rdf_metadata_attributes'], ); if (!empty($variables['content']['comment_body']['#prefix'])) { $rdf_metadata['#suffix'] = $variables['content']['comment_body']['#prefix']; } $variables['content']['comment_body']['#prefix'] = drupal_render($rdf_metadata); }} |
Please login to continue.