MapBuilder::addEmail

public function addEmail($email)
{
	if($email === '')
	{
		return $this;
	}

	$keys = preg_split('/W+/', $email, -1, PREG_SPLIT_NO_EMPTY);
	foreach($keys as $key)
	{
		$key = Content::prepareStringToken($key);
		if(!isset($this->tokens[$key]))
		{
			$this->tokens[$key] = true;
		}
	}

	$key = Content::prepareStringToken($email);
	$this->tokens[$key] = true;

	return $this;
}