function skinr_preprocess in Skinr 8.2

Same name and namespace in other branches

1. 6.2 skinr.module \skinr_preprocess()
2. 6 skinr.module \skinr_preprocess()
3. 7.2 skinr.module \skinr_preprocess()

Implements hook_preprocess().

@todo Optimize this function by removing dependencies on skinr_get_skin_info() and similar resource heavy functions. @todo Account for Drupal's caching being enabled and make it work.

File

./skinr.module, line 142

Handles core Skinr functionality.

Code

function skinr_preprocess(&$variables, $hook) {

  // Fix for update script.
  if (defined('MAINTENANCE_MODE')) {
    return;
  }
  $data =& drupal_static(__FUNCTION__);

  // Caching the data returned from the following functions is reported to
  // improve performance.
  if (!isset($data)) {
    $data['current_theme'] = skinr_current_theme();
    $data['skin_info'] = skinr_get_skin_info();
    $data['theme_registry'] = \Drupal::service('theme.registry')
      ->getRuntime();
    $data['skip_cache'] = FALSE;
    $implementations = \Drupal::moduleHandler()
      ->getImplementations('skinr_preprocess_alter');

    // skinr_panels is special case that only runs when skinr_context is enabled.
    if (count($implementations) > 0 && $implementations[0] !== 'skinr_panels') {

      // Skip caching whenever a module implements skinr_preprocess_alter.
      $data['skip_cache'] = TRUE;
    }
  }

  // @todo Use $variables['theme_hook_original'] ?
  $original_hook = $hook;

  // dpm($hook . '|' . $variables['theme_hook_original']);
  // An array of $elements based on $module and $original_hook, derived from $variables.
  $implementations = \Drupal::cache('bootstrap')
    ->get('skinr_elements');
  $array_elements = skinr_invoke_all('skinr_elements', $variables, $original_hook, 'preprocess');
  foreach ($array_elements as $element_type => $elements) {
    $applied_skins = array();
    foreach ($elements as $element) {
      $cid = 'skinr_preprocess:' . $element_type . ':' . $element . ':' . $data['current_theme'];
      if (!$data['skip_cache'] && ($cached = \Drupal::cache()
        ->get($cid))) {

        // This type of caching is incompatible with skinr_context.
        $applied_skins = $cached->data;
      }
      else {
        $properties = array(
          'theme' => $data['current_theme'],
          'element_type' => $element_type,
          'element' => $element,
          'status' => 1,
        );
        $skins = entity_load_multiple_by_properties('skin', $properties);

        // Invoke hook_skinr_preprocess_alter() in all modules.
        $context = array(
          'hook' => $hook,
          'variables' => &$variables,
          'theme' => $data['current_theme'],
          'element_type' => $element_type,
          'elements' => $elements,
        );
        \Drupal::moduleHandler()
          ->alter('skinr_preprocess', $skins, $context);
        $applied_skins = array();
        foreach ($skins as $skin) {
          $applied_skins = array(
            $skin->skin => $skin
              ->getOptions(),
          ) + $applied_skins;
        }

        // Cache data.
        if (!$data['skip_cache']) {
          \Drupal::cache('data')
            ->set($cid, $applied_skins, CacheBackendInterface::CACHE_PERMANENT, array(
            'skinr:' . $element_type . ':' . $element,
          ));
        }
      }
    }

    // Attach JS and CSS, and add classes.
    if (!empty($applied_skins)) {
      foreach ($applied_skins as $skin_name => $skin_options) {

        // Special case for _additional.
        if ($skin_name == '_additional') {
          continue;
        }
        $skin_info = $data['skin_info'][$skin_name];

        // Make sure this skin is enabled for the current theme.
        $status = skinr_skin_info_status_get($skin_info);
        if (empty($status[$data['current_theme']])) {
          continue;
        }
        if (isset($skin_info['attached'])) {
          $variables['#attached']['library'][] = 'skinr/skinr.' . $skin_name;
        }
        if (!is_array($skin_options)) {
          $skin_options = array(
            $skin_options,
          );
        }
        foreach ($skin_options as $skin_option) {
          if (isset($data['skin_info'][$skin_name]['options'][$skin_option]['attached'])) {
            $variables['#attached']['library'][] = 'skinr/skinr.' . $skin_name . '.' . $skin_option;
          }
        }
      }
      $flattened_skins_array = skinr_flatten_skins_array($applied_skins);
      if (isset($variables['attributes']['class'])) {
        $variables['attributes']['class'] = array_merge($variables['attributes']['class'], $flattened_skins_array);
      }
      else {
        $variables['attributes']['class'] = $flattened_skins_array;
      }
    }
  }
}