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<?php
/**
 * Image Creation class for CAPTCHA
 * Xoops Frameworks addon
 *
 * based on Frameworks::captcha by Taiwen Jiang (phppp or D.J.) <php_pp@hotmail.com>
 *
 * @copyright   The XOOPS project http://www.xoops.org/
 * @license     http://www.fsf.org/copyleft/gpl.html GNU public license
 * @author      Taiwen Jiang (phppp or D.J.) <php_pp@hotmail.com>
 * @since       XOOPS
 *
 * @category    ICMS
 * @package     Form
 * @subpackage  Elements
 * @author      Taiwen Jiang (phppp or D.J.) <php_pp@hotmail.com>
 * @version     SVN: $Id: Image.php 12340 2013-09-22 04:11:09Z skenow $
 */

/**
 * The captcha image
 *
 * @author      modified by Sina Asghari (aka stranger) <pesian_stranger@users.sourceforge.net>
 * @category    ICMS
 * @package     Form
 * @subpackage  Elements
 *
 */
class icms_form_elements_captcha_Image {
    //var $config   = array();

    /**
     * Constructor
     */
    public function __construct() {
    }

    /**
     * Creates instance of icmsCaptchaImage
     * @return  object the icms_form_elements_captcha_Image object
     */
    public function &instance() {
        static $instance;
        if (!isset($instance)) {
            $instance = new self();
        }
        return $instance;
    }

    /**
     * Loading configs from CAPTCHA class
     * @param   array $config the configuration array
     */
    public function loadConfig($config = array()) {
        // Loading default preferences
        $this->config =& $config;
    }

    /**
     * Renders the Captcha image Returns form with image in it
     * @return  string String that contains the Captcha Image form
     */
    public function render() {
        global $icmsConfigCaptcha;
        $form = "<input type='text' name='" . $this->config["name"]
            . "' id='" . $this->config["name"]
            . "' size='" . $icmsConfigCaptcha['captcha_num_chars']
            . "' maxlength='" . $icmsConfigCaptcha['captcha_num_chars']
            . "' value='' /> &nbsp; ". $this->loadImage();
        $rule = htmlspecialchars(ICMS_CAPTCHA_REFRESH, ENT_QUOTES);
        if ($icmsConfigCaptcha['captcha_maxattempt']) {
            $rule .=  " | ". sprintf(constant("ICMS_CAPTCHA_MAXATTEMPTS"), $icmsConfigCaptcha['captcha_maxattempt']);
        }
        $form .= "&nbsp;&nbsp;<small>{$rule}</small>";

        return $form;
    }

    /**
     * Loads the Captcha Image
     * @return  string String that contains the Captcha image
     */
    public function loadImage() {
        global $icmsConfigCaptcha;
        $rule = $icmsConfigCaptcha['captcha_casesensitive'] ? constant("ICMS_CAPTCHA_RULE_CASESENSITIVE") : constant("ICMS_CAPTCHA_RULE_CASEINSENSITIVE");
        $ret = "<img id='captcha' src='" . ICMS_URL . "/libraries/icms/form/elements/captcha/img.php' onclick=\"this.src='" . ICMS_URL . "/libraries/icms/form/elements/captcha/img.php?refresh='+Math.random()"
                    ."\" style='cursor: pointer;margin-left: auto;margin-right: auto;text-align:center;' alt='" . htmlspecialchars($rule, ENT_QUOTES) . "' />";
        return $ret;
    }
}