<?php

class Qs_Form_Element_Url extends Zend_Form_Element_Xhtml
{
    public $helper = 'formText';
    protected $_description = 'Example: www.google.com';
    protected $_defaultProtocol = 'http';

    public function init()
    {
        $this->addValidator('Url', true);
        $this->addFilter('StringTrim');
        return $this;
    }

    public function getDefaultProtocol()
    {
        return $this->_defaultProtocol;
    }

    public function setDefaultProtocol($defaultProtocol)
    {
        $this->_defaultProtocol = $defaultProtocol;
        return $this;
    }

    public function getValue()
    {
        if (($url = parent::getValue())) {
            if (!parse_url($url, PHP_URL_SCHEME) && ($protocol = $this->getDefaultProtocol())) {
                $url = $protocol . '://' . $url;
            }
        }
        return $url;
    }
}