--- /dev/null
+<?php
+
+namespace Drupal\comment;
+
+use Drupal\comment\Plugin\Field\FieldType\CommentItemInterface;
+use Drupal\Core\Entity\EntityFormBuilderInterface;
+use Drupal\Core\Entity\EntityInterface;
+use Drupal\Core\Entity\EntityManagerInterface;
+use Drupal\Core\Extension\ModuleHandlerInterface;
+use Drupal\Core\Render\RendererInterface;
+use Drupal\Core\Session\AccountInterface;
+use Drupal\Core\Url;
+
+/**
+ * Defines a service for comment #lazy_builder callbacks.
+ */
+class CommentLazyBuilders {
+
+ /**
+ * The entity manager service.
+ *
+ * @var \Drupal\Core\Entity\EntityManagerInterface
+ */
+ protected $entityManager;
+
+ /**
+ * The entity form builder service.
+ *
+ * @var \Drupal\Core\Entity\EntityFormBuilderInterface
+ */
+ protected $entityFormBuilder;
+
+ /**
+ * Comment manager service.
+ *
+ * @var \Drupal\comment\CommentManagerInterface
+ */
+ protected $commentManager;
+
+ /**
+ * Current logged in user.
+ *
+ * @var \Drupal\Core\Session\AccountInterface
+ */
+ protected $currentUser;
+
+ /**
+ * The module handler service.
+ *
+ * @var \Drupal\Core\Extension\ModuleHandlerInterface
+ */
+ protected $moduleHandler;
+
+ /**
+ * The renderer service.
+ *
+ * @var \Drupal\Core\Render\RendererInterface
+ */
+ protected $renderer;
+
+ /**
+ * Constructs a new CommentLazyBuilders object.
+ *
+ * @param \Drupal\Core\Entity\EntityManagerInterface $entity_manager
+ * The entity manager service.
+ * @param \Drupal\Core\Entity\EntityFormBuilderInterface $entity_form_builder
+ * The entity form builder service.
+ * @param \Drupal\Core\Session\AccountInterface $current_user
+ * The current logged in user.
+ * @param \Drupal\comment\CommentManagerInterface $comment_manager
+ * The comment manager service.
+ * @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
+ * The module handler service.
+ * @param \Drupal\Core\Render\RendererInterface $renderer
+ * The renderer service.
+ */
+ public function __construct(EntityManagerInterface $entity_manager, EntityFormBuilderInterface $entity_form_builder, AccountInterface $current_user, CommentManagerInterface $comment_manager, ModuleHandlerInterface $module_handler, RendererInterface $renderer) {
+ $this->entityManager = $entity_manager;
+ $this->entityFormBuilder = $entity_form_builder;
+ $this->currentUser = $current_user;
+ $this->commentManager = $comment_manager;
+ $this->moduleHandler = $module_handler;
+ $this->renderer = $renderer;
+ }
+
+ /**
+ * #lazy_builder callback; builds the comment form.
+ *
+ * @param string $commented_entity_type_id
+ * The commented entity type ID.
+ * @param string $commented_entity_id
+ * The commented entity ID.
+ * @param string $field_name
+ * The comment field name.
+ * @param string $comment_type_id
+ * The comment type ID.
+ *
+ * @return array
+ * A renderable array containing the comment form.
+ */
+ public function renderForm($commented_entity_type_id, $commented_entity_id, $field_name, $comment_type_id) {
+ $values = [
+ 'entity_type' => $commented_entity_type_id,
+ 'entity_id' => $commented_entity_id,
+ 'field_name' => $field_name,
+ 'comment_type' => $comment_type_id,
+ 'pid' => NULL,
+ ];
+ $comment = $this->entityManager->getStorage('comment')->create($values);
+ return $this->entityFormBuilder->getForm($comment);
+ }
+
+ /**
+ * #lazy_builder callback; builds a comment's links.
+ *
+ * @param string $comment_entity_id
+ * The comment entity ID.
+ * @param string $view_mode
+ * The view mode in which the comment entity is being viewed.
+ * @param string $langcode
+ * The language in which the comment entity is being viewed.
+ * @param bool $is_in_preview
+ * Whether the comment is currently being previewed.
+ *
+ * @return array
+ * A renderable array representing the comment links.
+ */
+ public function renderLinks($comment_entity_id, $view_mode, $langcode, $is_in_preview) {
+ $links = [
+ '#theme' => 'links__comment',
+ '#pre_render' => ['drupal_pre_render_links'],
+ '#attributes' => ['class' => ['links', 'inline']],
+ ];
+
+ if (!$is_in_preview) {
+ /** @var \Drupal\comment\CommentInterface $entity */
+ $entity = $this->entityManager->getStorage('comment')->load($comment_entity_id);
+ $commented_entity = $entity->getCommentedEntity();
+
+ $links['comment'] = $this->buildLinks($entity, $commented_entity);
+
+ // Allow other modules to alter the comment links.
+ $hook_context = [
+ 'view_mode' => $view_mode,
+ 'langcode' => $langcode,
+ 'commented_entity' => $commented_entity,
+ ];
+ $this->moduleHandler->alter('comment_links', $links, $entity, $hook_context);
+ }
+ return $links;
+ }
+
+ /**
+ * Build the default links (reply, edit, delete …) for a comment.
+ *
+ * @param \Drupal\comment\CommentInterface $entity
+ * The comment object.
+ * @param \Drupal\Core\Entity\EntityInterface $commented_entity
+ * The entity to which the comment is attached.
+ *
+ * @return array
+ * An array that can be processed by drupal_pre_render_links().
+ */
+ protected function buildLinks(CommentInterface $entity, EntityInterface $commented_entity) {
+ $links = [];
+ $status = $commented_entity->get($entity->getFieldName())->status;
+
+ if ($status == CommentItemInterface::OPEN) {
+ if ($entity->access('delete')) {
+ $links['comment-delete'] = [
+ 'title' => t('Delete'),
+ 'url' => $entity->urlInfo('delete-form'),
+ ];
+ }
+
+ if ($entity->access('update')) {
+ $links['comment-edit'] = [
+ 'title' => t('Edit'),
+ 'url' => $entity->urlInfo('edit-form'),
+ ];
+ }
+ if ($entity->access('create')) {
+ $links['comment-reply'] = [
+ 'title' => t('Reply'),
+ 'url' => Url::fromRoute('comment.reply', [
+ 'entity_type' => $entity->getCommentedEntityTypeId(),
+ 'entity' => $entity->getCommentedEntityId(),
+ 'field_name' => $entity->getFieldName(),
+ 'pid' => $entity->id(),
+ ]),
+ ];
+ }
+ if (!$entity->isPublished() && $entity->access('approve')) {
+ $links['comment-approve'] = [
+ 'title' => t('Approve'),
+ 'url' => Url::fromRoute('comment.approve', ['comment' => $entity->id()]),
+ ];
+ }
+ if (empty($links) && $this->currentUser->isAnonymous()) {
+ $links['comment-forbidden']['title'] = $this->commentManager->forbiddenMessage($commented_entity, $entity->getFieldName());
+ }
+ }
+
+ // Add translations link for translation-enabled comment bundles.
+ if ($this->moduleHandler->moduleExists('content_translation') && $this->access($entity)->isAllowed()) {
+ $links['comment-translations'] = [
+ 'title' => t('Translate'),
+ 'url' => $entity->urlInfo('drupal:content-translation-overview'),
+ ];
+ }
+
+ return [
+ '#theme' => 'links__comment__comment',
+ // The "entity" property is specified to be present, so no need to check.
+ '#links' => $links,
+ '#attributes' => ['class' => ['links', 'inline']],
+ ];
+ }
+
+ /**
+ * Wraps content_translation_translate_access.
+ */
+ protected function access(EntityInterface $entity) {
+ return content_translation_translate_access($entity);
+ }
+
+}
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