class TextWithSummaryHooks

class TextWithSummaryHooks {
  use StringTranslationTrait;
  
  /**
   * Implements hook_help().
   */
  public function help($route_name, RouteMatchInterface $route_match) : ?string {
    switch ($route_name) {
      case 'help.page.text_with_summary':
        $output = '';
        $output .= '<h2>' . $this->t('About') . '</h2>';
        $output .= '<p>' . $this->t('The Text With Summary Field module allows you to create long text fields with optional summaries. See the <a href=":field">Field module help</a> and the <a href=":field_ui">Field UI help</a> pages for general information on fields and how to create and manage them. For more information, see the <a href=":text_documentation">online documentation for the Text With Summary Field module</a>.', [
          ':field' => Url::fromRoute('help.page', [
            'name' => 'field',
          ])->toString(),
          ':field_ui' => \Drupal::moduleHandler()->moduleExists('field_ui') ? Url::fromRoute('help.page', [
            'name' => 'field_ui',
          ])->toString() : '#',
          ':text_documentation' => 'https://www.drupal.org/documentation/modules/text',
        ]) . '</p>';
        $output .= '<h2>' . $this->t('Uses') . '</h2>';
        $output .= '<dl>';
        $output .= '<dt>' . $this->t('Managing and displaying text fields') . '</dt>';
        $output .= '<dd>' . $this->t('The <em>settings</em> and <em>display</em> of the text field can be configured separately. See the <a href=":field_ui">Field UI help</a> for more information on how to manage fields and their display.', [
          ':field_ui' => \Drupal::moduleHandler()->moduleExists('field_ui') ? Url::fromRoute('help.page', [
            'name' => 'field_ui',
          ])->toString() : '#',
        ]) . '</dd>';
        $output .= '<dt>' . $this->t('Creating short text fields') . '</dt>';
        $output .= '<dd>' . $this->t('If you choose <em>Text (plain)</em> or <em>Text (formatted)</em> as the field type on the <em>Manage fields</em> page, then a field with a single row is displayed. You can change the maximum text length in the <em>Field settings</em> when you set up the field.') . '</dd>';
        $output .= '<dt>' . $this->t('Creating long text fields') . '</dt>';
        $output .= '<dd>' . $this->t('If you choose <em>Text (plain, long)</em>, <em>Text (formatted, long)</em>, or <em>Text (formatted, long, with summary)</em> on the <em>Manage fields</em> page, then users can insert text of unlimited length. On the <em>Manage form display</em> page, you can set the number of rows that are displayed to users.') . '</dd>';
        $output .= '<dt>' . $this->t('Trimming the text length') . '</dt>';
        $output .= '<dd>' . $this->t('On the <em>Manage display</em> page you can choose to display a trimmed version of the text, and if so, where to cut off the text.') . '</dd>';
        $output .= '<dt>' . $this->t('Displaying summaries instead of trimmed text') . '</dt>';
        $output .= '<dd>' . $this->t('As an alternative to using a trimmed version of the text, you can enter a separate summary by choosing the <em>Text (formatted, long, with summary)</em> field type on the <em>Manage fields</em> page. Even when <em>Summary input</em> is enabled, and summaries are provided, you can display <em>trimmed</em> text nonetheless by choosing the appropriate format on the <em>Manage display</em> page.') . '</dd>';
        $output .= '<dt>' . $this->t('Using text formats and editors') . '</dt>';
        $output .= '<dd>' . $this->t('If you choose <em>Text (plain)</em> or <em>Text (plain, long)</em> you restrict the input to <em>Plain text</em> only. If you choose <em>Text (formatted)</em>, <em>Text (formatted, long)</em>, or <em>Text (formatted, long with summary)</em> you allow users to write formatted text. Which options are available to individual users depends on the settings on the <a href=":formats">Text formats and editors page</a>.', [
          ':formats' => Url::fromRoute('filter.admin_overview')->toString(),
        ]) . '</dd>';
        $output .= '</dl>';
        return $output;
    }
    return NULL;
  }
  
  /**
   * Implements hook_field_formatter_info_alter().
   */
  public function fieldFormatterInfoAlter(&$info) : void {
    if (isset($info['text_default'])) {
      $info['text_default']['field_types'][] = 'text_with_summary';
    }
    if (isset($info['text_trimmed'])) {
      $info['text_trimmed']['field_types'][] = 'text_with_summary';
    }
  }
  
  /**
   * Implements hook_library_info_alter().
   *
   * @todo remove hook when moved to contrib and text/drupal.text is deleted.
   */
  public function libraryInfoAlter(array &$libraries, string $extension) : void {
    if ($extension === 'text' && isset($libraries['drupal.text'])) {
      $libraries['drupal.text']['js'] = [];
      $libraries['drupal.text']['dependencies'][] = 'text_with_summary/drupal.text';
    }
  }

}