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<?php

/**
 * EReCaptcha class file.
 *
 * @author Rodolfo González <metayii.framework@gmail.com>
 *
 * @link http://www.yiiframework.com/
 *
 * @copyright Copyright &copy; 2008-2011 Rodolfo González
 * @license
 *
 * Copyright © 2008-2011 by Rodolfo González
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 * - Neither the name of MetaYii nor the names of its contributors may
 *   be used to endorse or promote products derived from this software without
 *   specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/**
 * Include the reCAPTCHA PHP wrapper.
 */
require_once dirname(__FILE__).DIRECTORY_SEPARATOR.'reCAPTCHA'.DIRECTORY_SEPARATOR.'recaptchalib.php';

/**
 * EReCaptcha generates a CAPTCHA using the service provided by reCAPTCHA {@link http://recaptcha.net/}.
 * See LICENCE.txt for the terms of use for this service.
 *
 * EReCaptcha should be used together with {@link EReCaptchaValidator}.
 *
 * @author MetaYii
 *
 * @since 1.3
 */
class EReCaptcha extends CInputWidget
{
    //***************************************************************************
   // Configuration.
   //***************************************************************************

/**
     * reCAPTCHA public key.
     *
     * @var string
     */
    protected $publicKey = '';

/**
    * The theme name for the widget. Valid themes are 'red', 'white', 'blackglass', 'clean', 'custom'.
    *
    * @var string the theme name for the widget
    */
   protected $theme = 'red';

/**
    * The language for the widget. Valid languages are 'en', 'nl', 'fr', 'de', 'pt', 'ru', 'es', 'tr'.
    *
    * @var string the language suffix
    */
   protected $language = 'en';

/**
    * @var string the tab index for the HTML tag
    */
   public $tabIndex = 0;

/**
    * @var string the id for the HTML containing the custom theme
    */
   public $customThemeWidget = '';

/**
    * @var bool whether to use SSL for connections. If false, autodetection will be used.
    */
   public $useSsl = false;

//***************************************************************************
   // Internal properties.
   //***************************************************************************

/**
    * Valid languages.
    *
    * @var array
    */
   protected $validLanguages = array('en','nl','fr','de','pt','ru','es','tr');

/**
    * Valid themes.
    *
    * @var array
    */
   protected $validThemes = array('red','white','blackglass','clean','custom');

//***************************************************************************
   // Setters and getters.
   //***************************************************************************

/**
    * Sets the public key.
    *
    * @param string $value
    *
    * @throws CException if $value is not valid.
    */
   public function setPublicKey($value)
   {
       if (empty($value) || !is_string($value)) {
           throw new CException(Yii::t('yii', 'EReCaptcha.publicKey must contain your reCAPTCHA public key.'));
       }
       $this->publicKey = $value;
   }

/**
    * Returns the reCAPTCHA protected key.
    *
    * @return string
    */
   public function getPublicKey()
   {
       return $this->publicKey;
   }

/**
     * Sets the language.
     *
     * @param string $value the language string
     *
     * @return string
     */
    public function setLanguage($value)
    {
        $suffix = empty($value) ? 'en' : (($p = strpos($value, '_')) !== false) ? strtolower(substr($value, 0, $p)) : strtolower($value);
        if (in_array($suffix, $this->validLanguages)) {
            $this->language = $suffix;
        }
    }

/**
     * Returns the language value.
     *
     * @return string
     */
    public function getLanguage()
    {
        return $this->language;
    }

/**
     * Sets the theme.
     *
     * @param string $value the theme
     */
    public function setTheme($value)
    {
        if (in_array($value, $this->validThemes)) {
            $this->theme = $value;
        }
    }

/**
     * Returns the theme.
     *
     * @return string
     */
    public function getTheme()
    {
        return $this->theme;
    }

//***************************************************************************
   // Run Lola Run
   //***************************************************************************

public function init()
   {
       $customthemewidget = (($w = $this->customThemeWidget) != '') ? "'{$w}'" : 'null';
       $cs = Yii::app()->getClientScript();

if (!$cs->isScriptRegistered(get_class($this).'_options')) {
           $script = <<<EOP
var RecaptchaOptions = {
   theme : '{$this->theme}',
   custom_theme_widget : {$customthemewidget},
   lang : '{$this->language}',
   tabindex : {$this->tabIndex}
};
EOP;
           $cs->registerScript(get_class($this).'_options', $script, CClientScript::POS_HEAD);
       }
   }

/**
     * Renders the widget.
     */
    public function run()
    {
        $body = '';
        if ($this->hasModel()) {
            $body = CHtml::activeHiddenField($this->model, $this->attribute)."\n";
        }
        echo $body.recaptcha_get_html($this->publicKey,
                                      null,
                                      ($this->useSsl ? true : Yii::app()->request->isSecureConnection));
    }
}

[+] ..
[-] EReCaptcha.php [edit]
[+] reCAPTCHA
[-] EReCaptchaValidator.php [edit]