Chat::setCanPost

public function setCanPost(string $canPost): self
{
	$canPost = mb_strtoupper($canPost);
	if (!in_array(
		$canPost,
		[
			self::MANAGE_RIGHTS_NONE,
			self::MANAGE_RIGHTS_MEMBER,
			self::MANAGE_RIGHTS_OWNER,
			self::MANAGE_RIGHTS_MANAGERS
		],
		true
	))
	{
		$canPost = $this->getDefaultCanPost();
	}
	$this->canPost = $canPost;

	return $this;
}