Chris@0: <?php
Chris@0: 
Chris@0: namespace Drupal\forum;
Chris@0: 
Chris@0: use Drupal\Core\Config\ConfigFactoryInterface;
Chris@0: use Drupal\Core\Database\Connection;
Chris@0: use Drupal\Core\DependencyInjection\DependencySerializationTrait;
Chris@18: use Drupal\Core\DependencyInjection\DeprecatedServicePropertyTrait;
Chris@18: use Drupal\Core\Entity\EntityFieldManagerInterface;
Chris@18: use Drupal\Core\Entity\EntityTypeManagerInterface;
Chris@0: use Drupal\Core\Session\AccountInterface;
Chris@0: use Drupal\Core\StringTranslation\TranslationInterface;
Chris@0: use Drupal\Core\StringTranslation\StringTranslationTrait;
Chris@0: use Drupal\comment\CommentManagerInterface;
Chris@0: use Drupal\node\NodeInterface;
Chris@0: 
Chris@0: /**
Chris@0:  * Provides forum manager service.
Chris@0:  */
Chris@0: class ForumManager implements ForumManagerInterface {
Chris@0:   use StringTranslationTrait;
Chris@0:   use DependencySerializationTrait {
Chris@0:     __wakeup as defaultWakeup;
Chris@0:     __sleep as defaultSleep;
Chris@0:   }
Chris@18:   use DeprecatedServicePropertyTrait;
Chris@18: 
Chris@18:   /**
Chris@18:    * {@inheritdoc}
Chris@18:    */
Chris@18:   protected $deprecatedProperties = ['entityManager' => 'entity.manager'];
Chris@0: 
Chris@0:   /**
Chris@0:    * Forum sort order, newest first.
Chris@0:    */
Chris@0:   const NEWEST_FIRST = 1;
Chris@0: 
Chris@0:   /**
Chris@0:    * Forum sort order, oldest first.
Chris@0:    */
Chris@0:   const OLDEST_FIRST = 2;
Chris@0: 
Chris@0:   /**
Chris@0:    * Forum sort order, posts with most comments first.
Chris@0:    */
Chris@0:   const MOST_POPULAR_FIRST = 3;
Chris@0: 
Chris@0:   /**
Chris@0:    * Forum sort order, posts with the least comments first.
Chris@0:    */
Chris@0:   const LEAST_POPULAR_FIRST = 4;
Chris@0: 
Chris@0:   /**
Chris@0:    * Forum settings config object.
Chris@0:    *
Chris@0:    * @var \Drupal\Core\Config\ConfigFactoryInterface
Chris@0:    */
Chris@0:   protected $configFactory;
Chris@0: 
Chris@0:   /**
Chris@18:    * Entity field manager.
Chris@0:    *
Chris@18:    * @var \Drupal\Core\Entity\EntityFieldManagerInterface
Chris@0:    */
Chris@18:   protected $entityFieldManager;
Chris@18: 
Chris@18:   /**
Chris@18:    * Entity type manager.
Chris@18:    *
Chris@18:    * @var \Drupal\Core\Entity\EntityTypeManagerInterface
Chris@18:    */
Chris@18:   protected $entityTypeManager;
Chris@0: 
Chris@0:   /**
Chris@0:    * Database connection
Chris@0:    *
Chris@0:    * @var \Drupal\Core\Database\Connection
Chris@0:    */
Chris@0:   protected $connection;
Chris@0: 
Chris@0:   /**
Chris@0:    * The comment manager service.
Chris@0:    *
Chris@0:    * @var \Drupal\comment\CommentManagerInterface
Chris@0:    */
Chris@0:   protected $commentManager;
Chris@0: 
Chris@0:   /**
Chris@0:    * Array of last post information keyed by forum (term) id.
Chris@0:    *
Chris@0:    * @var array
Chris@0:    */
Chris@0:   protected $lastPostData = [];
Chris@0: 
Chris@0:   /**
Chris@0:    * Array of forum statistics keyed by forum (term) id.
Chris@0:    *
Chris@0:    * @var array
Chris@0:    */
Chris@0:   protected $forumStatistics = [];
Chris@0: 
Chris@0:   /**
Chris@0:    * Array of forum children keyed by parent forum (term) id.
Chris@0:    *
Chris@0:    * @var array
Chris@0:    */
Chris@0:   protected $forumChildren = [];
Chris@0: 
Chris@0:   /**
Chris@0:    * Array of history keyed by nid.
Chris@0:    *
Chris@0:    * @var array
Chris@0:    */
Chris@0:   protected $history = [];
Chris@0: 
Chris@0:   /**
Chris@0:    * Cached forum index.
Chris@0:    *
Chris@0:    * @var \Drupal\taxonomy\TermInterface
Chris@0:    */
Chris@0:   protected $index;
Chris@0: 
Chris@0:   /**
Chris@0:    * Constructs the forum manager service.
Chris@0:    *
Chris@0:    * @param \Drupal\Core\Config\ConfigFactoryInterface $config_factory
Chris@0:    *   The config factory service.
Chris@18:    * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
Chris@18:    *   The entity type manager.
Chris@0:    * @param \Drupal\Core\Database\Connection $connection
Chris@0:    *   The current database connection.
Chris@0:    * @param \Drupal\Core\StringTranslation\TranslationInterface $string_translation
Chris@0:    *   The translation manager service.
Chris@0:    * @param \Drupal\comment\CommentManagerInterface $comment_manager
Chris@0:    *   The comment manager service.
Chris@18:    * @param \Drupal\Core\Entity\EntityFieldManagerInterface $entity_field_manager
Chris@18:    *   The entity field manager.
Chris@0:    */
Chris@18:   public function __construct(ConfigFactoryInterface $config_factory, EntityTypeManagerInterface $entity_type_manager, Connection $connection, TranslationInterface $string_translation, CommentManagerInterface $comment_manager, EntityFieldManagerInterface $entity_field_manager = NULL) {
Chris@0:     $this->configFactory = $config_factory;
Chris@18:     $this->entityTypeManager = $entity_type_manager;
Chris@0:     $this->connection = $connection;
Chris@0:     $this->stringTranslation = $string_translation;
Chris@0:     $this->commentManager = $comment_manager;
Chris@18:     if (!$entity_field_manager) {
Chris@18:       @trigger_error('The entity_field.manager service must be passed to ForumManager::__construct(), it is required before Drupal 9.0.0. See https://www.drupal.org/node/2549139.', E_USER_DEPRECATED);
Chris@18:       $entity_field_manager = \Drupal::service('entity_field.manager');
Chris@18:     }
Chris@18:     $this->entityFieldManager = $entity_field_manager;
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function getTopics($tid, AccountInterface $account) {
Chris@0:     $config = $this->configFactory->get('forum.settings');
Chris@0:     $forum_per_page = $config->get('topics.page_limit');
Chris@0:     $sortby = $config->get('topics.order');
Chris@0: 
Chris@0:     $header = [
Chris@0:       ['data' => $this->t('Topic'), 'field' => 'f.title'],
Chris@0:       ['data' => $this->t('Replies'), 'field' => 'f.comment_count'],
Chris@0:       ['data' => $this->t('Last reply'), 'field' => 'f.last_comment_timestamp'],
Chris@0:     ];
Chris@0: 
Chris@0:     $order = $this->getTopicOrder($sortby);
Chris@0:     for ($i = 0; $i < count($header); $i++) {
Chris@0:       if ($header[$i]['field'] == $order['field']) {
Chris@0:         $header[$i]['sort'] = $order['sort'];
Chris@0:       }
Chris@0:     }
Chris@0: 
Chris@0:     $query = $this->connection->select('forum_index', 'f')
Chris@0:       ->extend('Drupal\Core\Database\Query\PagerSelectExtender')
Chris@0:       ->extend('Drupal\Core\Database\Query\TableSortExtender');
Chris@0:     $query->fields('f');
Chris@0:     $query
Chris@0:       ->condition('f.tid', $tid)
Chris@0:       ->addTag('node_access')
Chris@0:       ->addMetaData('base_table', 'forum_index')
Chris@0:       ->orderBy('f.sticky', 'DESC')
Chris@0:       ->orderByHeader($header)
Chris@0:       ->limit($forum_per_page);
Chris@0: 
Chris@0:     $count_query = $this->connection->select('forum_index', 'f');
Chris@0:     $count_query->condition('f.tid', $tid);
Chris@0:     $count_query->addExpression('COUNT(*)');
Chris@0:     $count_query->addTag('node_access');
Chris@0:     $count_query->addMetaData('base_table', 'forum_index');
Chris@0: 
Chris@0:     $query->setCountQuery($count_query);
Chris@0:     $result = $query->execute();
Chris@0:     $nids = [];
Chris@0:     foreach ($result as $record) {
Chris@0:       $nids[] = $record->nid;
Chris@0:     }
Chris@0:     if ($nids) {
Chris@18:       $nodes = $this->entityTypeManager->getStorage('node')->loadMultiple($nids);
Chris@0: 
Chris@0:       $query = $this->connection->select('node_field_data', 'n')
Chris@0:         ->extend('Drupal\Core\Database\Query\TableSortExtender');
Chris@0:       $query->fields('n', ['nid']);
Chris@0: 
Chris@0:       $query->join('comment_entity_statistics', 'ces', "n.nid = ces.entity_id AND ces.field_name = 'comment_forum' AND ces.entity_type = 'node'");
Chris@0:       $query->fields('ces', [
Chris@0:         'cid',
Chris@0:         'last_comment_uid',
Chris@0:         'last_comment_timestamp',
Chris@17:         'comment_count',
Chris@0:       ]);
Chris@0: 
Chris@0:       $query->join('forum_index', 'f', 'f.nid = n.nid');
Chris@0:       $query->addField('f', 'tid', 'forum_tid');
Chris@0: 
Chris@0:       $query->join('users_field_data', 'u', 'n.uid = u.uid AND u.default_langcode = 1');
Chris@0:       $query->addField('u', 'name');
Chris@0: 
Chris@0:       $query->join('users_field_data', 'u2', 'ces.last_comment_uid = u2.uid AND u.default_langcode = 1');
Chris@0: 
Chris@0:       $query->addExpression('CASE ces.last_comment_uid WHEN 0 THEN ces.last_comment_name ELSE u2.name END', 'last_comment_name');
Chris@0: 
Chris@0:       $query
Chris@0:         ->orderBy('f.sticky', 'DESC')
Chris@0:         ->orderByHeader($header)
Chris@0:         ->condition('n.nid', $nids, 'IN')
Chris@0:         // @todo This should be actually filtering on the desired node language
Chris@0:         //   and just fall back to the default language.
Chris@0:         ->condition('n.default_langcode', 1);
Chris@0: 
Chris@0:       $result = [];
Chris@0:       foreach ($query->execute() as $row) {
Chris@0:         $topic = $nodes[$row->nid];
Chris@0:         $topic->comment_mode = $topic->comment_forum->status;
Chris@0: 
Chris@0:         foreach ($row as $key => $value) {
Chris@0:           $topic->{$key} = $value;
Chris@0:         }
Chris@0:         $result[] = $topic;
Chris@0:       }
Chris@0:     }
Chris@0:     else {
Chris@0:       $result = [];
Chris@0:     }
Chris@0: 
Chris@0:     $topics = [];
Chris@0:     $first_new_found = FALSE;
Chris@0:     foreach ($result as $topic) {
Chris@0:       if ($account->isAuthenticated()) {
Chris@0:         // A forum is new if the topic is new, or if there are new comments since
Chris@0:         // the user's last visit.
Chris@0:         if ($topic->forum_tid != $tid) {
Chris@0:           $topic->new = 0;
Chris@0:         }
Chris@0:         else {
Chris@0:           $history = $this->lastVisit($topic->id(), $account);
Chris@0:           $topic->new_replies = $this->commentManager->getCountNewComments($topic, 'comment_forum', $history);
Chris@0:           $topic->new = $topic->new_replies || ($topic->last_comment_timestamp > $history);
Chris@0:         }
Chris@0:       }
Chris@0:       else {
Chris@0:         // Do not track "new replies" status for topics if the user is anonymous.
Chris@0:         $topic->new_replies = 0;
Chris@0:         $topic->new = 0;
Chris@0:       }
Chris@0: 
Chris@0:       // Make sure only one topic is indicated as the first new topic.
Chris@0:       $topic->first_new = FALSE;
Chris@0:       if ($topic->new != 0 && !$first_new_found) {
Chris@0:         $topic->first_new = TRUE;
Chris@0:         $first_new_found = TRUE;
Chris@0:       }
Chris@0: 
Chris@0:       if ($topic->comment_count > 0) {
Chris@0:         $last_reply = new \stdClass();
Chris@0:         $last_reply->created = $topic->last_comment_timestamp;
Chris@0:         $last_reply->name = $topic->last_comment_name;
Chris@0:         $last_reply->uid = $topic->last_comment_uid;
Chris@0:         $topic->last_reply = $last_reply;
Chris@0:       }
Chris@0:       $topics[$topic->id()] = $topic;
Chris@0:     }
Chris@0: 
Chris@0:     return ['topics' => $topics, 'header' => $header];
Chris@0: 
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * Gets topic sorting information based on an integer code.
Chris@0:    *
Chris@0:    * @param int $sortby
Chris@0:    *   One of the following integers indicating the sort criteria:
Chris@0:    *   - ForumManager::NEWEST_FIRST: Date - newest first.
Chris@0:    *   - ForumManager::OLDEST_FIRST: Date - oldest first.
Chris@0:    *   - ForumManager::MOST_POPULAR_FIRST: Posts with the most comments first.
Chris@0:    *   - ForumManager::LEAST_POPULAR_FIRST: Posts with the least comments first.
Chris@0:    *
Chris@0:    * @return array
Chris@0:    *   An array with the following values:
Chris@0:    *   - field: A field for an SQL query.
Chris@0:    *   - sort: 'asc' or 'desc'.
Chris@0:    */
Chris@0:   protected function getTopicOrder($sortby) {
Chris@0:     switch ($sortby) {
Chris@0:       case static::NEWEST_FIRST:
Chris@0:         return ['field' => 'f.last_comment_timestamp', 'sort' => 'desc'];
Chris@0: 
Chris@0:       case static::OLDEST_FIRST:
Chris@0:         return ['field' => 'f.last_comment_timestamp', 'sort' => 'asc'];
Chris@0: 
Chris@0:       case static::MOST_POPULAR_FIRST:
Chris@0:         return ['field' => 'f.comment_count', 'sort' => 'desc'];
Chris@0: 
Chris@0:       case static::LEAST_POPULAR_FIRST:
Chris@0:         return ['field' => 'f.comment_count', 'sort' => 'asc'];
Chris@0: 
Chris@0:     }
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * Gets the last time the user viewed a node.
Chris@0:    *
Chris@0:    * @param int $nid
Chris@0:    *   The node ID.
Chris@0:    * @param \Drupal\Core\Session\AccountInterface $account
Chris@0:    *   Account to fetch last time for.
Chris@0:    *
Chris@0:    * @return int
Chris@0:    *   The timestamp when the user last viewed this node, if the user has
Chris@0:    *   previously viewed the node; otherwise HISTORY_READ_LIMIT.
Chris@0:    */
Chris@0:   protected function lastVisit($nid, AccountInterface $account) {
Chris@0:     if (empty($this->history[$nid])) {
Chris@0:       $result = $this->connection->select('history', 'h')
Chris@0:         ->fields('h', ['nid', 'timestamp'])
Chris@0:         ->condition('uid', $account->id())
Chris@0:         ->execute();
Chris@0:       foreach ($result as $t) {
Chris@0:         $this->history[$t->nid] = $t->timestamp > HISTORY_READ_LIMIT ? $t->timestamp : HISTORY_READ_LIMIT;
Chris@0:       }
Chris@0:     }
Chris@0:     return isset($this->history[$nid]) ? $this->history[$nid] : HISTORY_READ_LIMIT;
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * Provides the last post information for the given forum tid.
Chris@0:    *
Chris@0:    * @param int $tid
Chris@0:    *   The forum tid.
Chris@0:    *
Chris@0:    * @return \stdClass
Chris@0:    *   The last post for the given forum.
Chris@0:    */
Chris@0:   protected function getLastPost($tid) {
Chris@0:     if (!empty($this->lastPostData[$tid])) {
Chris@0:       return $this->lastPostData[$tid];
Chris@0:     }
Chris@0:     // Query "Last Post" information for this forum.
Chris@0:     $query = $this->connection->select('node_field_data', 'n');
Chris@0:     $query->join('forum', 'f', 'n.vid = f.vid AND f.tid = :tid', [':tid' => $tid]);
Chris@0:     $query->join('comment_entity_statistics', 'ces', "n.nid = ces.entity_id AND ces.field_name = 'comment_forum' AND ces.entity_type = 'node'");
Chris@0:     $query->join('users_field_data', 'u', 'ces.last_comment_uid = u.uid AND u.default_langcode = 1');
Chris@0:     $query->addExpression('CASE ces.last_comment_uid WHEN 0 THEN ces.last_comment_name ELSE u.name END', 'last_comment_name');
Chris@0: 
Chris@0:     $topic = $query
Chris@0:       ->fields('ces', ['last_comment_timestamp', 'last_comment_uid'])
Chris@0:       ->condition('n.status', 1)
Chris@0:       ->orderBy('last_comment_timestamp', 'DESC')
Chris@0:       ->range(0, 1)
Chris@0:       ->addTag('node_access')
Chris@0:       ->execute()
Chris@0:       ->fetchObject();
Chris@0: 
Chris@0:     // Build the last post information.
Chris@0:     $last_post = new \stdClass();
Chris@0:     if (!empty($topic->last_comment_timestamp)) {
Chris@0:       $last_post->created = $topic->last_comment_timestamp;
Chris@0:       $last_post->name = $topic->last_comment_name;
Chris@0:       $last_post->uid = $topic->last_comment_uid;
Chris@0:     }
Chris@0: 
Chris@0:     $this->lastPostData[$tid] = $last_post;
Chris@0:     return $last_post;
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * Provides statistics for a forum.
Chris@0:    *
Chris@0:    * @param int $tid
Chris@0:    *   The forum tid.
Chris@0:    *
Chris@0:    * @return \stdClass|null
Chris@0:    *   Statistics for the given forum if statistics exist, else NULL.
Chris@0:    */
Chris@0:   protected function getForumStatistics($tid) {
Chris@0:     if (empty($this->forumStatistics)) {
Chris@0:       // Prime the statistics.
Chris@0:       $query = $this->connection->select('node_field_data', 'n');
Chris@0:       $query->join('comment_entity_statistics', 'ces', "n.nid = ces.entity_id AND ces.field_name = 'comment_forum' AND ces.entity_type = 'node'");
Chris@0:       $query->join('forum', 'f', 'n.vid = f.vid');
Chris@0:       $query->addExpression('COUNT(n.nid)', 'topic_count');
Chris@0:       $query->addExpression('SUM(ces.comment_count)', 'comment_count');
Chris@0:       $this->forumStatistics = $query
Chris@0:         ->fields('f', ['tid'])
Chris@0:         ->condition('n.status', 1)
Chris@0:         ->condition('n.default_langcode', 1)
Chris@0:         ->groupBy('tid')
Chris@0:         ->addTag('node_access')
Chris@0:         ->execute()
Chris@0:         ->fetchAllAssoc('tid');
Chris@0:     }
Chris@0: 
Chris@0:     if (!empty($this->forumStatistics[$tid])) {
Chris@0:       return $this->forumStatistics[$tid];
Chris@0:     }
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function getChildren($vid, $tid) {
Chris@0:     if (!empty($this->forumChildren[$tid])) {
Chris@0:       return $this->forumChildren[$tid];
Chris@0:     }
Chris@0:     $forums = [];
Chris@18:     $_forums = $this->entityTypeManager->getStorage('taxonomy_term')->loadTree($vid, $tid, NULL, TRUE);
Chris@0:     foreach ($_forums as $forum) {
Chris@0:       // Merge in the topic and post counters.
Chris@0:       if (($count = $this->getForumStatistics($forum->id()))) {
Chris@0:         $forum->num_topics = $count->topic_count;
Chris@0:         $forum->num_posts = $count->topic_count + $count->comment_count;
Chris@0:       }
Chris@0:       else {
Chris@0:         $forum->num_topics = 0;
Chris@0:         $forum->num_posts = 0;
Chris@0:       }
Chris@0: 
Chris@0:       // Merge in last post details.
Chris@0:       $forum->last_post = $this->getLastPost($forum->id());
Chris@0:       $forums[$forum->id()] = $forum;
Chris@0:     }
Chris@0: 
Chris@0:     $this->forumChildren[$tid] = $forums;
Chris@0:     return $forums;
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function getIndex() {
Chris@0:     if ($this->index) {
Chris@0:       return $this->index;
Chris@0:     }
Chris@0: 
Chris@0:     $vid = $this->configFactory->get('forum.settings')->get('vocabulary');
Chris@18:     $index = $this->entityTypeManager->getStorage('taxonomy_term')->create([
Chris@0:       'tid' => 0,
Chris@0:       'container' => 1,
Chris@0:       'parents' => [],
Chris@0:       'isIndex' => TRUE,
Chris@17:       'vid' => $vid,
Chris@0:     ]);
Chris@0: 
Chris@0:     // Load the tree below.
Chris@0:     $index->forums = $this->getChildren($vid, 0);
Chris@0:     $this->index = $index;
Chris@0:     return $index;
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function resetCache() {
Chris@0:     // Reset the index.
Chris@0:     $this->index = NULL;
Chris@0:     // Reset history.
Chris@0:     $this->history = [];
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function getParents($tid) {
Chris@18:     return $this->entityTypeManager->getStorage('taxonomy_term')->loadAllParents($tid);
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function checkNodeType(NodeInterface $node) {
Chris@0:     // Fetch information about the forum field.
Chris@18:     $field_definitions = $this->entityFieldManager->getFieldDefinitions('node', $node->bundle());
Chris@0:     return !empty($field_definitions['taxonomy_forums']);
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function unreadTopics($term, $uid) {
Chris@0:     $query = $this->connection->select('node_field_data', 'n');
Chris@0:     $query->join('forum', 'f', 'n.vid = f.vid AND f.tid = :tid', [':tid' => $term]);
Chris@0:     $query->leftJoin('history', 'h', 'n.nid = h.nid AND h.uid = :uid', [':uid' => $uid]);
Chris@0:     $query->addExpression('COUNT(n.nid)', 'count');
Chris@0:     return $query
Chris@0:       ->condition('status', 1)
Chris@0:       // @todo This should be actually filtering on the desired node status
Chris@0:       //   field language and just fall back to the default language.
Chris@0:       ->condition('n.default_langcode', 1)
Chris@0:       ->condition('n.created', HISTORY_READ_LIMIT, '>')
Chris@0:       ->isNull('h.nid')
Chris@0:       ->addTag('node_access')
Chris@0:       ->execute()
Chris@0:       ->fetchField();
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function __sleep() {
Chris@0:     $vars = $this->defaultSleep();
Chris@0:     // Do not serialize static cache.
Chris@0:     unset($vars['history'], $vars['index'], $vars['lastPostData'], $vars['forumChildren'], $vars['forumStatistics']);
Chris@0:     return $vars;
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function __wakeup() {
Chris@0:     $this->defaultWakeup();
Chris@0:     // Initialize static cache.
Chris@0:     $this->history = [];
Chris@0:     $this->lastPostData = [];
Chris@0:     $this->forumChildren = [];
Chris@0:     $this->forumStatistics = [];
Chris@0:     $this->index = NULL;
Chris@0:   }
Chris@0: 
Chris@0: }