AutoSearchUserSettings::tryToSetMergeId

public function tryToSetMergeId(string $mergeId): bool
{
	$currentMergeId = $this->getMergeId();
	if ($currentMergeId === $mergeId)
	{
		return true;
	}
	$mergeActivityTimestamp = $this->getMergeActivityDate() ?
		$this->getMergeActivityDate()->getTimestamp() : 0;
	if (
		!$currentMergeId ||
		(time() - $mergeActivityTimestamp > static::MERGE_ACTIVITY_TIMEOUT))
	{
		$this
			->setMergeId($mergeId)
			->setMergeActivityDate(new DateTime())
			->save();
		return true;
	}
	return false;
}