<?php

class Application_Form_Login extends Zend_Form
{

    public function init()
    {
        $CC_CONFIG = Config::getConfig();

        // Set the method for the display form to POST
        $this->setMethod('post');

        //If the request comes from an origin we consider safe, we disable the CSRF
        //token checking ONLY for the login page.
        $request = Zend_Controller_Front::getInstance()->getRequest();
        if ($request) {
            $refererUrl = $request->getHeader('referer');
            $originIsSafe = false;
            foreach (CORSHelper::getAllowedOrigins($request) as $safeOrigin) {
                if ($this->startsWith($safeOrigin, $refererUrl)) {
                    $originIsSafe = true;
                    break;
                }
            }
        }

        if (!$originIsSafe) {
            $this->addElement('hash', 'csrf', array(
               'salt' => 'unique'
            ));
        }

        $this->setDecorators(array(
            array('ViewScript', array('viewScript' => 'form/login.phtml'))
        ));

        // Add username element
        $username = new Zend_Form_Element_Text("username");
        $username->setLabel(_('Username:'))
            ->setAttribs(array(
                'autofocus' => 'true',
                'class' => 'input_text',
                'required' => 'true'))
            ->setValue((isset($CC_CONFIG['demo']) && $CC_CONFIG['demo'] == 1)?'admin':'')
            ->addFilter('StringTrim')
            ->setDecorators(array('ViewHelper'))
            ->setValidators(array('NotEmpty'));
        $this->addElement($username);

        // Add password element
        $this->addElement('password', 'password', array(
            'label'      => _('Password:'),
            'class'      => 'input_text',
            'required'   => true,
            'value'      => (isset($CC_CONFIG['demo']) && $CC_CONFIG['demo'] == 1)?'admin':'',
            'filters'    => array('StringTrim'),
            'validators' => array(
                'NotEmpty',
            ),
            'decorators' => array(
                'ViewHelper'
            )
        ));
        
        $locale = new Zend_Form_Element_Select("locale");
        $locale->setLabel(_("Language:"));
        $locale->setMultiOptions(Application_Model_Locale::getLocales());
        $locale->setDecorators(array('ViewHelper'));
        $this->addElement($locale);
        $this->setDefaults(array(
            "locale" => Application_Model_Locale::getUserLocale()
        ));

        // Add the submit button
        $this->addElement('submit', 'submit', array(
            'ignore'   => true,
            'label'    => _('Login'),
            'class'      => 'ui-button ui-widget ui-state-default ui-button-text-only center',
            'decorators' => array(
                'ViewHelper'
            )
        ));

    }


    /**
     * tests if a string starts with a given string
     *
     * This method was pinched as is from phing since it was the only line of code
     * actually used from phing. I'm not 100% convinced why it was deemed necessary
     * in the first place as it is a rather simple method in the first place.
     *
     * For now it's here as a copy and we can refactor it away completely later.
     *
     * @see <https://github.com/phingofficial/phing/blob/41b2f54108018cf69aaa73904fade23e5adfd0cc/classes/phing/util/StringHelper.php>
     *
     * @param $check
     * @param $string
     *
     * @return bool
     */
    private function startsWith($check, $string)
    {
        if ($check === "" || $check === $string) {
            return true;
        } else {
            return (strpos($string, $check) === 0) ? true : false;
        }
    }
}
