/**
* Validates theme installations and uninstallations.
*
* @param \Drupal\Core\Config\ConfigImporter $config_importer
* The configuration importer.
*/
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.', array('%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.', array('%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.', array('%theme' => $theme_name, '%dependent_theme' => $dependent_theme_name)));
}
}
}
}
