class ClaroPreRender

class ClaroPreRender implements TrustedCallbackInterface {
    
    /**
     * Prerender callback for managed_file.
     */
    public static function managedFile($element) {
        if (!empty($element['remove_button']) && is_array($element['remove_button'])) {
            $element['remove_button']['#attributes']['class'][] = 'button--extrasmall';
            $element['remove_button']['#attributes']['class'][] = 'remove-button';
        }
        if (!empty($element['upload_button']) && is_array($element['upload_button'])) {
            $element['upload_button']['#attributes']['class'][] = 'upload-button';
        }
        // Wrap single-cardinality widgets with a details element.
        $single_file_widget = !empty($element['#cardinality']) && $element['#cardinality'] === 1;
        if ($single_file_widget && empty($element['#single_wrapped'])) {
            $element['#theme_wrappers']['details'] = [
                '#title' => $element['#title'],
                '#summary_attributes' => [],
                '#attributes' => [
                    'open' => TRUE,
                ],
                '#value' => NULL,
                // The description of the single cardinality file widgets will be
                // displayed by the managed file widget.
'#description' => NULL,
                '#required' => $element['#required'],
                '#errors' => NULL,
                '#disabled' => !empty($element['#disabled']),
            ];
            $element['#single_wrapped'] = TRUE;
            $upload_is_accessible = empty($element['#default_value']['fids']) && (!isset($element['upload']['#access']) || $element['upload']['#access'] !== FALSE);
            if ($upload_is_accessible) {
                // Change widget title. This is the same title that is used by the
                // multiple file widget.
                // @see https://git.drupalcode.org/project/drupal/blob/ade7b950a1/core/modules/file/src/Plugin/Field/FieldWidget/FileWidget.php#L192
                $element['#title'] = t('Add a new file');
            }
            else {
                // If the field has a value, the file upload title doesn't have to be
                // visible because the wrapper element will have the same title as the
                // managed file widget. The title is kept in the markup as visually
                // hidden for accessibility.
                $element['#title_display'] = 'invisible';
            }
        }
        return $element;
    }
    
    /**
     * Prerender callback for Vertical Tabs element.
     */
    public static function verticalTabs($element) {
        $group_type_is_details = isset($element['group']['#type']) && $element['group']['#type'] === 'details';
        $groups_are_present = isset($element['group']['#groups']) && is_array($element['group']['#groups']);
        // If the vertical tabs have a details group, add attributes to those
        // details elements so they are styled as accordion items and have BEM
        // classes.
        if ($group_type_is_details && $groups_are_present) {
            $group_keys = Element::children($element['group']['#groups'], TRUE);
            $first_key = TRUE;
            $last_group_with_child_key = NULL;
            $last_group_with_child_key_last_child_key = NULL;
            foreach ($group_keys as $group_key) {
                $children_keys = Element::children($element['group']['#groups'][$group_key], TRUE);
                foreach ($children_keys as $child_key) {
                    $last_group_with_child_key = $group_key;
                    $type = isset($element['group']['#groups'][$group_key][$child_key]['#type']) ? $element['group']['#groups'][$group_key][$child_key]['#type'] : NULL;
                    if ($type === 'details') {
                        // Add BEM class to specify the details element is in a vertical
                        // tabs group.
                        $element['group']['#groups'][$group_key][$child_key]['#attributes']['class'][] = 'vertical-tabs__item';
                        $element['group']['#groups'][$group_key][$child_key]['#vertical_tab_item'] = TRUE;
                        if ($first_key) {
                            $element['group']['#groups'][$group_key][$child_key]['#attributes']['class'][] = 'vertical-tabs__item--first';
                            $first_key = FALSE;
                        }
                        $last_group_with_child_key_last_child_key = $child_key;
                    }
                }
            }
            if ($last_group_with_child_key && $last_group_with_child_key_last_child_key) {
                $element['group']['#groups'][$last_group_with_child_key][$last_group_with_child_key_last_child_key]['#attributes']['class'][] = 'vertical-tabs__item--last';
            }
            $element['#attributes']['class'][] = 'vertical-tabs__items';
        }
        return $element;
    }
    
    /**
     * Prerender callback for Dropbutton element.
     *
     * @todo Revisit after https://www.drupal.org/node/3057581 is added.
     */
    public static function dropButton($element) {
        if (!empty($element['#dropbutton_type']) && is_string($element['#dropbutton_type'])) {
            $supported_types = [
                'small',
                'extrasmall',
            ];
            if (in_array($element['#dropbutton_type'], $supported_types)) {
                $element['#attributes']['class'][] = 'dropbutton--' . $element['#dropbutton_type'];
            }
        }
        return $element;
    }
    
    /**
     * Prerender callback for container elements.
     *
     * @param array $element
     *   The container element.
     *
     * @return array
     *   The processed container element.
     */
    public static function container(array $element) {
        if (!empty($element['#accordion'])) {
            // The container must work as an accordion list wrapper.
            $element['#attributes']['class'][] = 'accordion';
            $children_keys = Element::children($element['#groups']['advanced'], TRUE);
            foreach ($children_keys as $key) {
                $element['#groups']['advanced'][$key]['#attributes']['class'][] = 'accordion__item';
                // Mark children with type Details as accordion item.
                if (!empty($element['#groups']['advanced'][$key]['#type']) && $element['#groups']['advanced'][$key]['#type'] === 'details') {
                    $element['#groups']['advanced'][$key]['#accordion_item'] = TRUE;
                }
            }
        }
        return $element;
    }
    
    /**
     * Prerender callback for text_format elements.
     */
    public static function textFormat($element) {
        // Add clearfix for filter wrapper.
        $element['format']['#attributes']['class'][] = 'clearfix';
        // Hide format select label visually.
        $element['format']['format']['#wrapper_attributes']['class'][] = 'form-item--editor-format';
        $element['format']['format']['#attributes']['class'][] = 'form-element--extrasmall';
        $element['format']['format']['#attributes']['class'][] = 'form-element--editor-format';
        // Fix JS inconsistencies of the 'text_textarea_with_summary' widgets.
        // @todo Remove when https://www.drupal.org/node/3016343 is fixed.
        if (!empty($element['summary']) && $element['summary']['#type'] === 'textarea') {
            $element['#attributes']['class'][] = 'js-text-format-wrapper';
            $element['value']['#wrapper_attributes']['class'][] = 'js-form-type-textarea';
        }
        return $element;
    }
    
    /**
     * Prerender callback for status_messages placeholder.
     *
     * @param array $element
     *   A renderable array.
     *
     * @return array
     *   The updated renderable array containing the placeholder.
     */
    public static function messagePlaceholder(array $element) {
        if (isset($element['fallback']['#markup'])) {
            $element['fallback']['#markup'] = '<div data-drupal-messages-fallback class="hidden messages-list"></div>';
        }
        return $element;
    }
    
    /**
     * {@inheritdoc}
     */
    public static function trustedCallbacks() {
        return [
            'managedFile',
            'verticalTabs',
            'dropButton',
            'container',
            'textFormat',
            'messagePlaceholder',
        ];
    }

}