function MediaEmbed::process

Overrides FilterInterface::process

File

core/modules/media/src/Plugin/Filter/MediaEmbed.php, line 278

Class

MediaEmbed

Provides a filter to embed media items using a custom tag.

Namespace

Code

public function process($text, $langcode) {
    $result = new FilterProcessResult($text);
    if (stristr($text, '<drupal-media') === FALSE) {
        return $result;
    }
    $dom = Html::load($text);
    $xpath = new \DOMXPath($dom);
    foreach ($xpath->query('//drupal-media[@data-entity-type="media" and normalize-space(@data-entity-uuid)!=""]') as $node) {
        
        /** @var \DOMElement $node */
        $uuid = $node->getAttribute('data-entity-uuid');
        $view_mode_id = $node->getAttribute('data-view-mode') ?: $this->settings['default_view_mode'];
        // Delete the consumed attributes.
        $node->removeAttribute('data-entity-type');
        $node->removeAttribute('data-entity-uuid');
        $node->removeAttribute('data-view-mode');
        $media = $this->entityRepository
            ->loadEntityByUuid('media', $uuid);
        assert($media === NULL || $media instanceof MediaInterface);
        if (!$media) {
            $this->loggerFactory
                ->get('media')
                ->error('During rendering of embedded media: the media item with UUID "@uuid" does not exist.', [
                '@uuid' => $uuid,
            ]);
        }
        else {
            $media = $this->entityRepository
                ->getTranslationFromContext($media, $langcode);
            $media = clone $media;
            $this->applyPerEmbedMediaOverrides($node, $media);
        }
        $view_mode = NULL;
        if ($view_mode_id !== EntityDisplayRepositoryInterface::DEFAULT_DISPLAY_MODE) {
            $view_mode = $this->entityRepository
                ->loadEntityByConfigTarget('entity_view_mode', "media.{$view_mode_id}");
            if (!$view_mode) {
                $this->loggerFactory
                    ->get('media')
                    ->error('During rendering of embedded media: the view mode "@view-mode-id" does not exist.', [
                    '@view-mode-id' => $view_mode_id,
                ]);
            }
        }
        $build = $media && ($view_mode || $view_mode_id === EntityDisplayRepositoryInterface::DEFAULT_DISPLAY_MODE) ? $this->renderMedia($media, $view_mode_id, $langcode) : $this->renderMissingMediaIndicator();
        if (empty($build['#attributes']['class'])) {
            $build['#attributes']['class'] = [];
        }
        // Any attributes not consumed by the filter should be carried over to the
        // rendered embedded entity. For example, `data-align` and `data-caption`
        // should be carried over, so that even when embedded media goes missing,
        // at least the caption and visual structure won't get lost.
        foreach ($node->attributes as $attribute) {
            if ($attribute->nodeName == 'class') {
                // We don't want to overwrite the existing CSS class of the embedded
                // media (or if the media entity can't be loaded, the missing media
                // indicator). But, we need to merge in CSS classes added by other
                // filters, such as filter_align, in order for those filters to work
                // properly.
                $build['#attributes']['class'] = array_unique(array_merge($build['#attributes']['class'], explode(' ', $attribute->nodeValue)));
            }
            else {
                $build['#attributes'][$attribute->nodeName] = $attribute->nodeValue;
            }
        }
        $this->renderIntoDomNode($build, $node, $result);
    }
    $result->setProcessedText(Html::serialize($dom));
    return $result;
}