function media_filter_format_edit_form_validate

Validate callback to ensure filter order and allowed_html are compatible.

File

core/modules/media/media.module, line 393

Code

function media_filter_format_edit_form_validate($form, FormStateInterface $form_state) {
    if ($form_state->getTriggeringElement()['#name'] !== 'op') {
        return;
    }
    $allowed_html_path = [
        'filters',
        'filter_html',
        'settings',
        'allowed_html',
    ];
    $filter_html_settings_path = [
        'filters',
        'filter_html',
        'settings',
    ];
    $filter_html_enabled = $form_state->getValue([
        'filters',
        'filter_html',
        'status',
    ]);
    $media_embed_enabled = $form_state->getValue([
        'filters',
        'media_embed',
        'status',
    ]);
    if (!$media_embed_enabled) {
        return;
    }
    $get_filter_label = function ($filter_plugin_id) use ($form) {
        return (string) $form['filters']['order'][$filter_plugin_id]['filter']['#markup'];
    };
    if ($filter_html_enabled && $form_state->getValue($allowed_html_path)) {
        
        /** @var \Drupal\filter\Entity\FilterFormat $filter_format */
        $filter_format = $form_state->getFormObject()
            ->getEntity();
        $filter_html = clone $filter_format->filters()
            ->get('filter_html');
        $filter_html->setConfiguration([
            'settings' => $form_state->getValue($filter_html_settings_path),
        ]);
        $restrictions = $filter_html->getHTMLRestrictions();
        $allowed = $restrictions['allowed'];
        // Require `<drupal-media>` HTML tag if filter_html is enabled.
        if (!isset($allowed['drupal-media'])) {
            $form_state->setError($form['filters']['settings']['filter_html']['allowed_html'], t('The %media-embed-filter-label filter requires <code>&lt;drupal-media&gt;</code> among the allowed HTML tags.', [
                '%media-embed-filter-label' => $get_filter_label('media_embed'),
            ]));
        }
        else {
            $required_attributes = [
                'data-entity-type',
                'data-entity-uuid',
            ];
            // If there are no attributes, the allowed item is set to FALSE,
            // otherwise, it is set to an array.
            if ($allowed['drupal-media'] === FALSE) {
                $missing_attributes = $required_attributes;
            }
            else {
                $missing_attributes = array_diff($required_attributes, array_keys($allowed['drupal-media']));
            }
            if ($missing_attributes) {
                $form_state->setError($form['filters']['settings']['filter_html']['allowed_html'], t('The <code>&lt;drupal-media&gt;</code> tag in the allowed HTML tags is missing the following attributes: <code>%list</code>.', [
                    '%list' => implode(', ', $missing_attributes),
                ]));
            }
        }
    }
    $filters = $form_state->getValue('filters');
    // The "media_embed" filter must run after "filter_align", "filter_caption",
    // and "filter_html_image_secure".
    $precedents = [
        'filter_align',
        'filter_caption',
        'filter_html_image_secure',
    ];
    $error_filters = [];
    foreach ($precedents as $filter_name) {
        // A filter that should run before media embed filter.
        $precedent = $filters[$filter_name];
        if (empty($precedent['status']) || !isset($precedent['weight'])) {
            continue;
        }
        if ($precedent['weight'] >= $filters['media_embed']['weight']) {
            $error_filters[$filter_name] = $get_filter_label($filter_name);
        }
    }
    if (!empty($error_filters)) {
        $error_message = \Drupal::translation()->formatPlural(count($error_filters), 'The %media-embed-filter-label filter needs to be placed after the %filter filter.', 'The %media-embed-filter-label filter needs to be placed after the following filters: %filters.', [
            '%media-embed-filter-label' => $get_filter_label('media_embed'),
            '%filter' => reset($error_filters),
            '%filters' => implode(', ', $error_filters),
        ]);
        $form_state->setErrorByName('filters', $error_message);
    }
}