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<?php
/**
 * Adding CAPTCHA
 *
 * Currently there are two types of CAPTCHA forms, text and image
 * The default mode is "text", it can be changed in the priority:
 * 1 If mode is set through icms_form_elements_Captcha::setMode(), take it
 * 2 Elseif mode is set though captcha/config.php, take it
 * 3 Else, take "text"
 *
 * @copyright   http://www.impresscms.org/ The ImpressCMS Project
 * @license     http://www.gnu.org/licenses/old-licenses/gpl-2.0.html GNU General Public License (GPL)
 * @category    ICMS
 * @package     Form
 * @subpackage  Elements
 * @author      Sina Asghari (aka stranger) <pesian_stranger@users.sourceforge.net>
 * @version     SVN: $Id: Captcha.php 10868 2010-12-11 12:02:57Z phoenyx $
 */

defined('ICMS_ROOT_PATH') or die("ImpressCMS root path not defined");

/*
 * Usage
 *
 * For form creation:
 * Add form element where proper: $form->addElement(new icms_form_elements_Captcha($caption, $name, $skipmember, ...);
 *
 * For verification:
 * $icmsCaptcha = icms_form_elements_captcha_Object::instance();
 * if (!$icmsCaptcha->verify()) {
 *   echo $icmsCaptcha->getMessage();
 *   ...
 * }
 */
/**
 * CAPTCHA form element
 *
 * @category    ICMS
 * @package     Form
 * @subpackage  Elements
 *
 */
class icms_form_elements_Captcha extends icms_form_Element {
    private $_captchaHandler;

    /**
     * @param string    $caption    Caption of the form element, default value is defined in captcha/language/
     * @param string    $name       Name for the input box
     * @param boolean   $skipmember Skip CAPTCHA check for members
     * @param int       $numchar    Number of characters in image mode, and input box size for text mode
     * @param int       $minfontsize    Minimum font-size of characters in image mode
     * @param int       $maxfontsize    Maximum font-size of characters in image mode
     * @param int       $backgroundtype Background type in image mode: 0 - bar; 1 - circle; 2 - line; 3 - rectangle; 4 - ellipse; 5 - polygon; 100 - generated from files
     * @param int       $backgroundnum  Number of background images in image mode
     *
     */
    public function __construct($caption = '', $name = 'icmscaptcha', $skipmember = null,
            $numchar = null, $minfontsize = null, $maxfontsize = null, $backgroundtype = null,
            $backgroundnum = null
    ) {
        $this->_captchaHandler =& icms_form_elements_captcha_Object::instance();
        $this->_captchaHandler->init(
            $name, $skipmember, $numchar, $minfontsize, $maxfontsize, $backgroundtype, $backgroundnum
        );
        if (!$this->_captchaHandler->active) {
            $this->setHidden();
        } else {
            $caption = !empty($caption) ? $caption : $this->_captchaHandler->getCaption();
            $this->setCaption($caption);
        }
    }

    /**
     * Sets the Config
     * @param   string $name Config Name
     * @param   string $val Config Value
     * @return  object reference to the icms_form_elements_captcha_Object Object (@link icms_form_elements_captcha_Object)
     */
    public function setConfig($name, $val) {
        return $this->_captchaHandler->setConfig($name, $val);
    }

    /**
     *
     * @see htdocs/libraries/icms/form/icms_form_Element::render()
     */
    public function render() {
        if (!$this->isHidden()) {
            return $this->_captchaHandler->render();
        }
    }
}