/**
* Callback for updating a theme.
*
* @param array $form
* Nested array of form elements that comprise the form.
* @param \Drupal\Core\Form\FormStateInterface $form_state
* The current state of the form.
*/
public static function updateTheme(array $form, FormStateInterface $form_state)
{
if ($theme = SystemThemeSettings::getTheme($form, $form_state)) {
// Due to the fact that the batch API stores it's arguments in DB storage,
// theme based objects cannot be passed as an operation argument here.
// During _batch_page(), the DB item will attempt to restore the arguments
// using unserialize() and the autoload fix include added below may not
// yet have been invoked to register the theme namespaces. So instead,
// we capture the relevant information needed to reconstruct these objects
// in the batch processing callback.
$theme_name = $theme->getName();
// Create an operation for each update.
$operations = [];
foreach ($theme->getPendingUpdates() as $update) {
$operations[] = [[__CLASS__, 'batchProcessUpdate'], [$theme_name, $update->getProvider() . ':' . $update->getSchema()]];
}
if ($operations) {
$variables = ['@theme_title' => $theme->getTitle()];
batch_set(['operations' => $operations, 'finished' => [__CLASS__, 'batchFinished'], 'title' => t('Updating @theme_title', $variables), 'init_message' => \Drupal::translation()->formatPlural(count($operations), 'Initializing 1 theme update for @theme_title...', 'Initializing @count theme updates for @theme_title...', $variables), 'progress_message' => t('Processing update @current of @total...', $variables), 'error_message' => t('An error was encountered while attempting to update the @theme_title theme.', $variables), 'file' => Bootstrap::autoloadFixInclude()]);
}
}
}