Load immediately before "class FM_DBUtil" in the "Sick_Vacation-lib.php" file in the "includes" folder.
*******************************************************************************************************************

////////AutoResponseSender/////////////
class FM_AutoResponseSender extends FM_ComposedMailSender
{
    private $subject;
    private $template;
    private $namevar;
    private $emailvar;

	public function __construct($subj="",$templ="")
	{
        parent::__construct();
        $this->subject = $subj;
        $this->template= $templ;
        $this->namevar= "";
        $this->emailvar= "";
	}	
	
    function SetToVariables($name_var,$email_var)
    {
        $this->namevar= $name_var;
        $this->emailvar= $email_var;
    }

	function SendAutoResponse()
	{
        $name_val = '';
        if(!empty($this->formvars[$this->namevar]))
        {
            $name_val = $this->formvars[$this->namevar];
        }

        $email_val = 
            $this->formvars[$this->emailvar];

        $email_val = trim($email_val);

        if(empty($email_val))
        {
            $this->logger->LogError("Email value is empty. Didn't send auto-response");
            return;
        }

        $this->InitMailer();

		$this->ComposeMessage($this->subject,$this->template);

       
		$name_val = trim($name_val);
        
        $to_var ='';

        if(!empty($name_val))
        {
            $to_var = "$name_val<$email_val>";
        }
        else
        {
            $to_var = $email_val;
        }

        if(!$this->ext_module->BeforeSendingAutoResponse($to_var,
                        $this->message_subject,$this->message_body))
         {
            $this->logger->LogInfo("The extension module stopped the auto-response to: $to_var");
            return;
         }
         
        $this->logger->LogInfo("sending auto response to: $to_var");

        $this->SendMail($this->config->from_addr,$to_var);
	}

    function Process(&$continue)
    {
        if(strlen($this->template)<=0||
           strlen($this->emailvar)<=0)
        {
            $this->logger->LogError("auto response: template or emailvar is empty!");
            return false;
        }
        $continue = true;
        $this->SendAutoResponse();
        return true;
    }
    
	function ValidateInstallation(&$app_command_obj)
    {
        if(!$app_command_obj->IsEmailTested())
        {
            return $app_command_obj->TestSMTPEmail();
        }
        return true;
    }
}