94 lines
2.6 KiB
PHP
94 lines
2.6 KiB
PHP
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<?php
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namespace Drupal\book;
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use Drupal\Core\Entity\Query\QueryFactory;
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use Drupal\Core\Extension\ModuleUninstallValidatorInterface;
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use Drupal\Core\StringTranslation\StringTranslationTrait;
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use Drupal\Core\StringTranslation\TranslationInterface;
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/**
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* Prevents book module from being uninstalled whilst any book nodes exist or
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* there are any book outline stored.
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*/
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class BookUninstallValidator implements ModuleUninstallValidatorInterface {
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use StringTranslationTrait;
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/**
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* The book outline storage.
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*
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* @var \Drupal\book\BookOutlineStorageInterface
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*/
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protected $bookOutlineStorage;
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/**
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* The entity query for node.
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*
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* @var \Drupal\Core\Entity\Query\QueryInterface
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*/
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protected $entityQuery;
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/**
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* Constructs a new BookUninstallValidator.
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*
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* @param \Drupal\book\BookOutlineStorageInterface $book_outline_storage
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* The book outline storage.
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* @param \Drupal\Core\Entity\Query\QueryFactory $query_factory
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* The entity query factory.
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* @param \Drupal\Core\StringTranslation\TranslationInterface $string_translation
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* The string translation service.
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*/
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public function __construct(BookOutlineStorageInterface $book_outline_storage, QueryFactory $query_factory, TranslationInterface $string_translation) {
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$this->bookOutlineStorage = $book_outline_storage;
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$this->entityQuery = $query_factory->get('node');
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$this->stringTranslation = $string_translation;
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}
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/**
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* {@inheritdoc}
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*/
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public function validate($module) {
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$reasons = [];
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if ($module == 'book') {
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if ($this->hasBookOutlines()) {
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$reasons[] = $this->t('To uninstall Book, delete all content that is part of a book');
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}
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else {
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// The book node type is provided by the Book module. Prevent uninstall
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// if there are any nodes of that type.
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if ($this->hasBookNodes()) {
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$reasons[] = $this->t('To uninstall Book, delete all content that has the Book content type');
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}
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}
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}
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return $reasons;
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}
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/**
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* Checks if there are any books in an outline.
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*
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* @return bool
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* TRUE if there are books, FALSE if not.
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*/
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protected function hasBookOutlines() {
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return $this->bookOutlineStorage->hasBooks();
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}
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/**
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* Determines if there is any book nodes or not.
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*
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* @return bool
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* TRUE if there are book nodes, FALSE otherwise.
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*/
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protected function hasBookNodes() {
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$nodes = $this->entityQuery
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->condition('type', 'book')
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->accessCheck(FALSE)
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->range(0, 1)
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->execute();
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return !empty($nodes);
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}
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}
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