public function BookUninstallValidator::validate

Determines the reasons a module can not be uninstalled.

Parameters

string $module: A module name.

Return value

string[] An array of reasons the module can not be uninstalled, empty if it can. Each reason should not end with any punctuation since multiple reasons can be displayed together.

Overrides ModuleUninstallValidatorInterface::validate

See also

template_preprocess_system_modules_uninstall()

File

core/modules/book/src/BookUninstallValidator.php, line 53

Class

BookUninstallValidator

Prevents book module from being uninstalled under certain conditions.

Namespace

Code

public function validate($module) {
  $reasons = [];
  if ($module == 'book') {
    if ($this
      ->hasBookOutlines()) {
      $reasons[] = $this
        ->t('To uninstall Book, delete all content that is part of a book');
    }
    else {

      // The book node type is provided by the Book module. Prevent uninstall
      // if there are any nodes of that type.
      if ($this
        ->hasBookNodes()) {
        $reasons[] = $this
          ->t('To uninstall Book, delete all content that has the Book content type');
      }
    }
  }
  return $reasons;
}