workbench.module

<?php

/**
 * @file
 * Workbench module file.
 */

use Drupal\Core\Routing\RouteMatchInterface;
use Drupal\workbench\Render\Element\WorkbenchToolbar;
use Drupal\Core\Url;

/**
 * Implements hook_help().
 */
function workbench_help($route_name, RouteMatchInterface $route_match) {
  switch ($route_name) {
    case 'help.page.workbench':
      $text = file_get_contents(dirname(__FILE__) . '/README.md');
      if (!\Drupal::moduleHandler()->moduleExists('markdown')) {
        return workbench_parse_help($text);
      }
      else {
        // Use the Markdown filter to render the README.
        $filter_manager = \Drupal::service('plugin.manager.filter');
        $settings = \Drupal::configFactory()->get('markdown.settings')->getRawData();
        $config = ['settings' => $settings];
        $filter = $filter_manager->createInstance('markdown', $config);
        return $filter->process($text, 'en');
      }
  }
  return NULL;
}

/**
 * Implements hook_toolbar().
 */
function workbench_toolbar() {
  // The 'Workbench' tab is a simple link, with no corresponding tray.
  $user = \Drupal::currentUser();

  $items = [];
  if ($user->hasPermission('access workbench')) {
    $items['workbench'] = [
      '#type' => 'toolbar_item',
      'tab' => [
        '#type' => 'link',
        '#title' => t('Workbench'),
        '#url' => Url::fromRoute('workbench.content'),
        '#attributes' => [
          'title' => t('My personal editorial workspace'),
          'class' => ['toolbar-icon', 'toolbar-icon-workbench-content-tab'],
        ],
      ],
      'tray' => [
        '#heading' => t('Your Workbench'),
        'workbench_toolbar' => [
          '#pre_render' => [
            [WorkbenchToolbar::class, 'preRenderTray'],
          ],
        ],
        '#type' => 'container',
      ],
      '#attached' => [
        'library' => [
          'workbench/workbench.toolbar',
        ],
      ],
      '#weight' => -18,
    ];
  }
  return $items;
}

/**
 * Simplified display of help text without markdown module.
 *
 * @param $text
 *   The help text markdown.
 *
 * @return HTML
 */
function workbench_parse_help($text) {
  $find = "```\n\n";
  $replace = '</pre>';
  $text = str_replace($find, $replace, $text);
  $find = "```";
  $replace = '<pre>';
  $text = str_replace($find, $replace, $text);
  $find = ["\n"];
  $replace = ['<br />'];
  $text = str_replace($find, $replace, $text);
  return $text;
}