/**
* 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)) {
$update_manager = new UpdateManager($theme);
$installed = [];
// Iterate over all pending updates.
$pending = $update_manager->getPendingUpdates();
foreach ($pending as $version => $update) {
// Run the update.
$result = $update->update($theme);
// Update failed. Show a message and stop the process.
if ($result === FALSE) {
drupal_set_message(t('The update @title (@version) failed. No further updates can be processed at this time.', ['@title' => $update->getTitle(), '@version' => $version]), 'error');
break;
}
// Update succeeded.
$installed[] = $version;
}
// Save the last installed schema version.
if ($installed) {
$installed = array_flip($installed);
foreach (array_keys($installed) as $version) {
$installed[$version] = new FormattableMarkup('@version - @title', ['@version' => $version, '@title' => $pending[$version]->getTitle()]);
}
$build = ['#theme' => 'item_list', '#items' => $installed];
drupal_set_message(t('Successfully installed the following update(s) for %theme: @installed', ['%theme' => $theme->getTitle(), '@installed' => \Drupal::service('renderer')->render($build)]));
// Save the latest installed version.
$theme->setSetting('schema', max(array_keys($installed)));
}
}
}
/**
* Installs a Bootstrap based theme.
*/
protected final function install()
{
$update_manager = new UpdateManager($this);
$this->setSetting('schema', $update_manager->getLatestVersion());
}
