function Comment::preSave

Overrides ContentEntityBase::preSave

File

core/modules/comment/src/Entity/Comment.php, line 87

Class

Comment

Defines the comment entity class.

Namespace

Code

public function preSave(EntityStorageInterface $storage) {
    parent::preSave($storage);
    if ($this->isNew()) {
        // Add the comment to database. This next section builds the thread field.
        // @see \Drupal\comment\CommentViewBuilder::buildComponents()
        $thread = $this->getThread();
        if (empty($thread)) {
            if ($this->threadLock) {
                // Thread lock was not released after being set previously.
                // This suggests there's a bug in code using this class.
                throw new \LogicException('preSave() is called again without calling postSave() or releaseThreadLock()');
            }
            if (!$this->hasParentComment()) {
                // This is a comment with no parent comment (depth 0): we start
                // by retrieving the maximum thread level.
                $max = $storage->getMaxThread($this);
                // Strip the "/" from the end of the thread.
                $max = rtrim($max, '/');
                // We need to get the value at the correct depth.
                $parts = explode('.', $max);
                $n = Number::alphadecimalToInt($parts[0]);
                $prefix = '';
            }
            else {
                // This is a comment with a parent comment, so increase the part of
                // the thread value at the proper depth.
                // Get the parent comment:
                $parent = $this->getParentComment();
                // Strip the "/" from the end of the parent thread.
                $parent->setThread((string) rtrim((string) $parent->getThread(), '/'));
                $prefix = $parent->getThread() . '.';
                // Get the max value in *this* thread.
                $max = $storage->getMaxThreadPerThread($this);
                if ($max == '') {
                    // First child of this parent. As the other two cases do an
                    // increment of the thread number before creating the thread
                    // string set this to -1 so it requires an increment too.
                    $n = -1;
                }
                else {
                    // Strip the "/" at the end of the thread.
                    $max = rtrim($max, '/');
                    // Get the value at the correct depth.
                    $parts = explode('.', $max);
                    $parent_depth = count(explode('.', $parent->getThread()));
                    $n = Number::alphadecimalToInt($parts[$parent_depth]);
                }
            }
            // Finally, build the thread field for this new comment. To avoid
            // race conditions, get a lock on the thread. If another process already
            // has the lock, just move to the next integer.
            do {
                $thread = $prefix . Number::intToAlphadecimal(++$n) . '/';
                $lock_name = "comment:{$this->getCommentedEntityId()}:{$thread}";
            } while (!\Drupal::lock()->acquire($lock_name));
            $this->threadLock = $lock_name;
        }
        $this->setThread($thread);
    }
    // The entity fields for name and mail have no meaning if the user is not
    // Anonymous. Set them to NULL to make it clearer that they are not used.
    // For anonymous users see \Drupal\comment\CommentForm::form() for mail,
    // and \Drupal\comment\CommentForm::buildEntity() for name setting.
    if (!$this->getOwner()
        ->isAnonymous()) {
        $this->set('name', NULL);
        $this->set('mail', NULL);
    }
}