maintenance_page_node-1.0.0-beta2/maintenance_page_node.module

<?php

/**
 * @file
 * Primary module hooks for Maintenance Node module.
 */

use Drupal\node\Entity\Node;
use Drupal\Core\Routing\RouteMatchInterface;

/**
 * Implements hook_help().
 */
function maintenance_page_node_help($route_name, RouteMatchInterface $route_match) {
  switch ($route_name) {
    // Main module help for the maintenance_page_node module.
    case 'help.page.maintenance_page_node':
      $output = '';
      $output .= '<h3>' . t('About') . '</h3>';
      $output .= '<p>' . t('This module allows you to choose a node to show when maintenance mode is on.
      When the module is installed, navigate to maintenance mode form (admin/config/development/maintenance)
      and an autocomplete node field is added. When this field is empty, the default message will be shown.') . '</p>';
      return $output;
  }
}

/**
 * Implements hook_preprocess_template() for maintenance_page.
 *
 * Load node from config to show in maintenance mode.
 */
function maintenance_page_node_preprocess_maintenance_page(&$variables): void {

  $maintenance_node_id = \Drupal::config('maintenance.node')->get('maintenance_node');
  if (!$maintenance_node_id) {
    return;
  }

  $node = \Drupal::service('entity_type.manager')->getStorage('node')->load($maintenance_node_id);
  if (!($node instanceof Node)) {
    return;
  }

  $builder = \Drupal::entityTypeManager()->getViewBuilder('node');
  $build = $builder->view($node, 'master');
  $variables['maintenance_node'] = \Drupal::service('renderer')->render($build);
}

/**
 * Implements hook_theme_registry_alter().
 */
function maintenance_page_node_theme_registry_alter(&$theme_registry): void {
  $theme_registry['maintenance_page']['path'] = \Drupal::service('extension.list.module')->getPath('maintenance_page_node') . '/templates';
}