<?php
/**
 * @property Zend_Form_Element $image
 * @property Zend_Form_Element $email
 * @property Zend_Form_Element $shortBio
 */
class Qs_Form extends Qs_Sys_Form
{
    const SPAM_PROTECTION_EMPTY_FIELD = 'field';
    const SPAM_PROTECTION_COOKIE = 'cookie';

    protected $_hasSpamProtection = false;
    protected $_spamProtectionType = self::SPAM_PROTECTION_COOKIE;
    protected $_spamProtectionMessage = 'Your data was not submitted';
    protected $_spamProtectionField = array(
        'label' => 'Leave Empty',
        'name' => 'whyDoYouLoveWinter',
    );

    public function init()
    {
        $this->_initSpamProtection();
        return parent::init();
    }

    public function validate($data = null)
    {
        if (!$this->_validateSpamProtection()) {
            return false;
        }
        return parent::validate($data);
    }

    protected function _initSpamProtection()
    {
        if ($this->_hasSpamProtection) {
            if (self::SPAM_PROTECTION_COOKIE == $this->_spamProtectionType) {
                $this->_initCookieProtection();
            } else {
                $this->_initEmptyFieldProtection();
            }
        }
        return $this;
    }

    protected function _initCookieProtection()
    {
        $cookieUrl = Qs_SiteMap::findFirst(null, array('type' => 'FormCookie_'), null, 'url');
        if (!$cookieUrl) {
            throw new Qs_Form_Exception('Page for cookie protection is not found!');
        }
        $cookieUrl .= '?form=' . rawurlencode($this->getId());

        /** @var Qs_Doc $doc */
        $doc = Zend_Registry::get('doc');
        $doc->addStylesheet($cookieUrl, array('skipPacking' => true));

        return $this;
    }

    protected function _initEmptyFieldProtection()
    {
        $field = $this->_spamProtectionField;
        $this->addElement('text', $field['name'], array('label' => $field['label']));
        $element = $this->getElement($field['name']);

        if (($htmlTag = $element->getDecorator('HtmlTag'))) {
            /** @var Qs_Form_Decorator_HtmlTag $htmlTag */
            $htmlTag->setOption('class', $field['name']);
        }

        return $this;
    }

    protected function _validateSpamProtection()
    {
        if ($this->_hasSpamProtection) {
            if (self::SPAM_PROTECTION_COOKIE == $this->_spamProtectionType) {
                $method = '_validateCookieProtection';
            } else if (self::SPAM_PROTECTION_EMPTY_FIELD == $this->_spamProtectionType) {
                $method = '_validateEmptyFieldProtection';
            } else {
                throw new Qs_Form_Exception('Unknown spam protections validation method');
            }

            if (!$this->{$method}()) {
                $this->addError($this->_spamProtectionMessage);
                return false;
            }
        }
        return true;
    }

    protected function _validateCookieProtection()
    {
        if (!App_FormCookie_View::getCookie($this->getId())) {
            return false;
        }
        return true;
    }

    protected function _validateEmptyFieldProtection()
    {
        if ('' != Qs_Request::getRequestValue($this->_spamProtectionField['name'])) {
            return false;
        }
        return true;
    }

    public function setHasSpamProtection($hasSpamProtection)
    {
        $this->_hasSpamProtection = $hasSpamProtection;
    }
}