Method getRecipient

public static function getRecipient($bas)
{
    if (isset($bas['b']['email_contact']) && $bas['b']['email_contact'] != '' && MailHelper::isEmailAddress($bas['b']['email_contact'])) {
        $recipient = $bas['b']['email_contact'];
    } else {
        if (isset($bas['b']['email']) && $bas['b']['email'] != '' && MailHelper::isEmailAddress($bas['b']['email'])) {
            $recipient = $bas['b']['email'];
        } else {
            if (isset($bas['s']['email_contact']) && $bas['s']['email_contact'] != '' && MailHelper::isEmailAddress($bas['s']['email_contact'])) {
                $recipient = $bas['s']['email_contact'];
            } else {
                if (isset($bas['s']['email']) && $bas['s']['email'] != '' && MailHelper::isEmailAddress($bas['s']['email'])) {
                    $recipient = $bas['s']['email'];
                }
            }
        }
    }
    return $recipient;
}