public function next()
{
if (!$this->valid()) {
return;
}
$lastOffset = $this->key();
do {
while ($this->topicIdIterator->valid()) {
$topicId = $this->topicIdIterator->current();
$this->topicIdIterator->next();
// this topic id has been seen before.
if ($topicId <= $lastOffset) {
continue;
}
// hidden and deleted threads come back as null
$topic = $this->importSource->getTopic($topicId);
if ($topic === null) {
continue;
}
$this->current = $topicId;
$this->currentTopic = $topic;
return;
}
} while ($this->loadMore());
// nothing found, nothing more to load
$this->current = false;
}
public function getObjectKey()
{
return $this->source->getObjectKey('header_for', $this->title);
}
