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<?php
namespace Drupal\forum;
use Drupal\Core\Config\ConfigFactoryInterface;
use Drupal\Core\Entity\EntityTypeManagerInterface;
use Drupal\Core\Extension\ModuleUninstallValidatorInterface;
use Drupal\Core\StringTranslation\StringTranslationTrait;
use Drupal\Core\StringTranslation\TranslationInterface;
use Drupal\taxonomy\VocabularyInterface;
/**
* Prevents forum module from being uninstalled whilst any forum nodes exist
* or there are any terms in the forum vocabulary.
*/
class ForumUninstallValidator implements ModuleUninstallValidatorInterface {
use StringTranslationTrait;
/**
* The entity type manager.
*
* @var \Drupal\Core\Entity\EntityTypeManagerInterface
*/
protected $entityTypeManager;
/**
* The config factory.
*
* @var \Drupal\Core\Config\ConfigFactoryInterface
*/
protected $configFactory;
/**
* Constructs a new ForumUninstallValidator.
*
* @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
* The entity type manager.
* @param \Drupal\Core\Config\ConfigFactoryInterface $config_factory
* The config factory.
* @param \Drupal\Core\StringTranslation\TranslationInterface $string_translation
* The string translation service.
*/
public function __construct(EntityTypeManagerInterface $entity_type_manager, ConfigFactoryInterface $config_factory, TranslationInterface $string_translation) {
$this->entityTypeManager = $entity_type_manager;
$this->configFactory = $config_factory;
$this->stringTranslation = $string_translation;
}
/**
* {@inheritdoc}
*/
public function validate($module) {
$reasons = [];
if ($module == 'forum') {
if ($this->hasForumNodes()) {
$reasons[] = $this->t('To uninstall Forum, first delete all <em>Forum</em> content');
}
$vocabulary = $this->getForumVocabulary();
if ($this->hasTermsForVocabulary($vocabulary)) {
if ($vocabulary->access('view')) {
$reasons[] = $this->t('To uninstall Forum, first delete all <a href=":url">%vocabulary</a> terms', [
'%vocabulary' => $vocabulary->label(),
':url' => $vocabulary->url('overview-form'),
]);
}
else {
$reasons[] = $this->t('To uninstall Forum, first delete all %vocabulary terms', [
'%vocabulary' => $vocabulary->label()
]);
}
}
}
return $reasons;
}
/**
* Determines if there are any forum nodes or not.
*
* @return bool
* TRUE if there are forum nodes, FALSE otherwise.
*/
protected function hasForumNodes() {
$nodes = $this->entityTypeManager->getStorage('node')->getQuery()
->condition('type', 'forum')
->accessCheck(FALSE)
->range(0, 1)
->execute();
return !empty($nodes);
}
/**
* Determines if there are any taxonomy terms for a specified vocabulary.
*
* @param \Drupal\taxonomy\VocabularyInterface $vocabulary
* The vocabulary to check for terms.
*
* @return bool
* TRUE if there are terms for this vocabulary, FALSE otherwise.
*/
protected function hasTermsForVocabulary(VocabularyInterface $vocabulary) {
$terms = $this->entityTypeManager->getStorage('taxonomy_term')->getQuery()
->condition('vid', $vocabulary->id())
->accessCheck(FALSE)
->range(0, 1)
->execute();
return !empty($terms);
}
/**
* Returns the vocabulary configured for forums.
*
* @return \Drupal\taxonomy\VocabularyInterface
* The vocabulary entity for forums.
*/
protected function getForumVocabulary() {
$vid = $this->configFactory->get('forum.settings')->get('vocabulary');
return $this->entityTypeManager->getStorage('taxonomy_vocabulary')->load($vid);
}
}