Drupal 8.0.0 beta 12. More info: https://www.drupal.org/node/2514176

core/modules/comment/src/CommentManagerInterface.php

@@ -0,0 +1,87 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\comment\CommentManagerInterface.
+ */
+
+namespace Drupal\comment;
+
+use Drupal\Core\Entity\EntityInterface;
+use Drupal\Core\Session\AccountInterface;
+use Drupal\comment\Plugin\Field\FieldType\CommentItemInterface;
+
+/**
+ * Comment manager contains common functions to manage comment fields.
+ */
+interface CommentManagerInterface {
+
+  /**
+   * Comments are displayed in a flat list - expanded.
+   */
+  const COMMENT_MODE_FLAT = 0;
+
+  /**
+   * Comments are displayed as a threaded list - expanded.
+   */
+  const COMMENT_MODE_THREADED = 1;
+
+  /**
+   * Utility function to return an array of comment fields.
+   *
+   * @param string $entity_type_id
+   *   The content entity type to which the comment fields are attached.
+   *
+   * @return array
+   *   An array of comment field map definitions, keyed by field name. Each
+   *   value is an array with two entries:
+   *   - type: The field type.
+   *   - bundles: The bundles in which the field appears, as an array with entity
+   *     types as keys and the array of bundle names as values.
+   *
+   * @see \Drupal\Core\Entity\EntityManagerInterface::getFieldMap()
+   */
+  public function getFields($entity_type_id);
+
+  /**
+   * Creates a comment_body field.
+   *
+   * @param string $comment_type
+   *   The comment bundle.
+   */
+  public function addBodyField($comment_type);
+
+  /**
+   * Provides a message if posting comments is forbidden.
+   *
+   * If authenticated users can post comments, a message is returned that
+   * prompts the anonymous user to log in (or register, if applicable) that
+   * redirects to entity comment form. Otherwise, no message is returned.
+   *
+   * @param \Drupal\Core\Entity\EntityInterface $entity
+   *   The entity to which comments are attached to.
+   * @param string $field_name
+   *   The field name on the entity to which comments are attached to.
+   *
+   * @return string
+   *   HTML for a "you can't post comments" notice.
+   */
+  public function forbiddenMessage(EntityInterface $entity, $field_name);
+
+  /**
+   * Returns the number of new comments available on a given entity for a user.
+   *
+   * @param \Drupal\Core\Entity\EntityInterface $entity
+   *   The entity to which the comments are attached to.
+   * @param string $field_name
+   *   (optional) The field_name to count comments for. Defaults to any field.
+   * @param int $timestamp
+   *   (optional) Time to count from. Defaults to time of last user access the
+   *   entity.
+   *
+   * @return int|false
+   *   The number of new comments or FALSE if the user is not authenticated.
+   */
+  public function getCountNewComments(EntityInterface $entity, $field_name = NULL, $timestamp = 0);
+
+}