protected function ConfigImportSubscriber::validateThemes in Drupal 9

Same name and namespace in other branches

1. 8 core/lib/Drupal/Core/EventSubscriber/ConfigImportSubscriber.php \Drupal\Core\EventSubscriber\ConfigImportSubscriber::validateThemes()

Validates theme installations and uninstallations.

Parameters

\Drupal\Core\Config\ConfigImporter $config_importer: The configuration importer.

1 call to ConfigImportSubscriber::validateThemes()

ConfigImportSubscriber::onConfigImporterValidate in core/lib/Drupal/Core/EventSubscriber/ConfigImportSubscriber.php

Validates the configuration to be imported.

File

core/lib/Drupal/Core/EventSubscriber/ConfigImportSubscriber.php, line 168

Class

ConfigImportSubscriber

Config import subscriber for config import events.

Namespace

Drupal\Core\EventSubscriber

Code

protected function validateThemes(ConfigImporter $config_importer) {
  $core_extension = $config_importer
    ->getStorageComparer()
    ->getSourceStorage()
    ->read('core.extension');

  // Get all themes including those that are not installed.
  $theme_data = $this
    ->getThemeData();
  $installs = $config_importer
    ->getExtensionChangelist('theme', 'install');
  foreach ($installs as $key => $theme) {
    if (!isset($theme_data[$theme])) {
      $config_importer
        ->logError($this
        ->t('Unable to install the %theme theme since it does not exist.', [
        '%theme' => $theme,
      ]));

      // Remove non-existing installs from the list so we can validate theme
      // dependencies later.
      unset($installs[$key]);
    }
  }

  // Ensure that all themes being installed have their dependencies met.
  foreach ($installs as $theme) {
    foreach (array_keys($theme_data[$theme]->requires) as $required_theme) {
      if (!isset($core_extension['theme'][$required_theme])) {
        $theme_name = $theme_data[$theme]->info['name'];
        $required_theme_name = $theme_data[$required_theme]->info['name'];
        $config_importer
          ->logError($this
          ->t('Unable to install the %theme theme since it requires the %required_theme theme.', [
          '%theme' => $theme_name,
          '%required_theme' => $required_theme_name,
        ]));
      }
    }
  }

  // Ensure that all themes being uninstalled are not required by themes that
  // will be installed after the import.
  $uninstalls = $config_importer
    ->getExtensionChangelist('theme', 'uninstall');
  foreach ($uninstalls as $theme) {
    foreach (array_keys($theme_data[$theme]->required_by) as $dependent_theme) {
      if ($theme_data[$dependent_theme]->status && !in_array($dependent_theme, $uninstalls, TRUE)) {
        $theme_name = $theme_data[$theme]->info['name'];
        $dependent_theme_name = $theme_data[$dependent_theme]->info['name'];
        $config_importer
          ->logError($this
          ->t('Unable to uninstall the %theme theme since the %dependent_theme theme is installed.', [
          '%theme' => $theme_name,
          '%dependent_theme' => $dependent_theme_name,
        ]));
      }
    }
  }
}