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+<?php
+
+/**
+ * TReCaptcha class file
+ *
+ * @author Bérczi Gábor <gabor.berczi@devworx.hu>
+ * @link http://www.devworx.hu/
+ * @copyright Copyright &copy; 2011 DevWorx
+ * @license https://github.com/pradosoft/prado/blob/master/COPYRIGHT
+ * @package System.Web.UI.WebControls
+ */
+
+ Prado::using('System.3rdParty.ReCaptcha.recaptchalib');
+
+/**
+ * TReCaptcha class.
+ *
+ * TReCaptcha displays a reCAPTCHA (a token displayed as an image) that can be used
+ * to determine if the input is entered by a real user instead of some program. It can
+ * also prevent multiple submits of the same form either by accident, or on purpose (ie. spamming).
+ *
+ * The reCAPTCHA to solve (a string consisting of two separate words) displayed is automatically
+ * generated by the reCAPTCHA system at recaptcha.net. However, in order to use the services
+ * of the site you will need to register and get a public and a private API key pair, and
+ * supply those to the reCAPTCHA control through setting the {@link setPrivateKey PrivateKey}
+ * and {@link setPublicKey PublicKey} properties.
+ *
+ * Currently the reCAPTCHA API supports only one reCAPTCHA field per page, so you MUST make sure that all
+ * your input is protected and validated by a single reCAPTCHA control. Placing more than one reCAPTCHA
+ * control on the page will lead to unpredictable results, and the user will most likely unable to solve
+ * any of them successfully.
+ *
+ * Upon postback, user input can be validated by calling {@link validate()}.
+ * The {@link TReCaptchaValidator} control can also be used to do validation, which provides
+ * server-side validation. Calling (@link validate()) will invalidate the token supplied, so all consecutive
+ * calls to the method - without solving a new captcha - will return false. Therefore if implementing a multi-stage
+ * input process, you must make sure that you call validate() only once, either at the end of the input process, or
+ * you store the result till the end of the processing.
+ *
+ * The following template shows a typical use of TReCaptcha control:
+ * <code>
+ * <com:TReCaptcha ID="Captcha"
+ * PublicKey="..."
+ * PrivateKey="..."
+ * />
+ * <com:TReCaptchaValidator ControlToValidate="Captcha"
+ * ErrorMessage="You are challenged!" />
+ * </code>
+ *
+ * @author Bérczi Gábor <gabor.berczi@devworx.hu>
+ * @package System.Web.UI.WebControls
+ * @since 3.2
+ */
+class TReCaptcha extends TWebControl implements IValidatable
+{
+ private $_isValid=true;
+
+ const ChallengeFieldName = 'recaptcha_challenge_field';
+ const ResponseFieldName = 'recaptcha_response_field';
+
+ public function getTagName()
+ {
+ return 'span';
+ }
+
+ /**
+ * Returns true if this control validated successfully.
+ * Defaults to true.
+ * @return bool wether this control validated successfully.
+ */
+ public function getIsValid()
+ {
+ return $this->_isValid;
+ }
+ /**
+ * @param bool wether this control is valid.
+ */
+ public function setIsValid($value)
+ {
+ $this->_isValid=TPropertyValue::ensureBoolean($value);
+ }
+
+ public function getValidationPropertyValue()
+ {
+ return $this->Request[$this->getChallengeFieldName()];
+ }
+
+ public function getPublicKey()
+ {
+ return $this->getViewState('PublicKey');
+ }
+
+ public function setPublicKey($value)
+ {
+ return $this->setViewState('PublicKey', TPropertyValue::ensureString($value));
+ }
+
+ public function getPrivateKey()
+ {
+ return $this->getViewState('PrivateKey');
+ }
+
+ public function setPrivateKey($value)
+ {
+ return $this->setViewState('PrivateKey', TPropertyValue::ensureString($value));
+ }
+
+ public function getThemeName()
+ {
+ return $this->getViewState('ThemeName');
+ }
+
+ public function setThemeName($value)
+ {
+ return $this->setViewState('ThemeName', TPropertyValue::ensureString($value));
+ }
+
+ public function getCustomTranslations()
+ {
+ return TPropertyValue::ensureArray($this->getViewState('CustomTranslations'));
+ }
+
+ public function setCustomTranslations($value)
+ {
+ return $this->setViewState('CustomTranslations', TPropertyValue::ensureArray($value));
+ }
+
+ public function getLanguage()
+ {
+ return $this->getViewState('Language');
+ }
+
+ public function setLanguage($value)
+ {
+ return $this->setViewState('Language', TPropertyValue::ensureString($value));
+ }
+
+ public function getCallbackScript()
+ {
+ return $this->getViewState('CallbackScript');
+ }
+
+ public function setCallbackScript($value)
+ {
+ return $this->setViewState('CallbackScript', TPropertyValue::ensureString($value));
+ }
+
+ protected function getChallengeFieldName()
+ {
+ return /*$this->ClientID.'_'.*/self::ChallengeFieldName;
+ }
+
+ public function getResponseFieldName()
+ {
+ return /*$this->ClientID.'_'.*/self::ResponseFieldName;
+ }
+
+ public function getClientSideOptions()
+ {
+ $options = array();
+ if ($theme = $this->getThemeName())
+ $options['theme'] = $theme;
+ if ($lang = $this->getLanguage())
+ $options['lang'] = $lang;
+ if ($trans = $this->getCustomTranslations())
+ $options['custom_translations'] = $trans;
+ return $options;
+ }
+
+ public function validate()
+ {
+ if (!
+ (
+ ($challenge = @$_POST[$this->getChallengeFieldName()])
+ and
+ ($response = @$_POST[$this->getResponseFieldName()])
+ )
+ )
+ return false;
+
+ $resp = recaptcha_check_answer(
+ $this->getPrivateKey(),
+ $_SERVER["REMOTE_ADDR"],
+ $challenge,
+ $response
+ );
+ return ($resp->is_valid==1);
+ }
+
+ /**
+ * Checks for API keys
+ * @param mixed event parameter
+ */
+ public function onPreRender($param)
+ {
+ parent::onPreRender($param);
+
+ if("" == $this->getPublicKey())
+ throw new TConfigurationException('recaptcha_publickey_unknown');
+ if("" == $this->getPrivateKey())
+ throw new TConfigurationException('recaptcha_privatekey_unknown');
+
+ // need to register captcha fields so they will be sent back also in callbacks
+ $page = $this->getPage();
+ $page->registerRequiresPostData($this->getChallengeFieldName());
+ $page->registerRequiresPostData($this->getResponseFieldName());
+ }
+
+ protected function addAttributesToRender($writer)
+ {
+ parent::addAttributesToRender($writer);
+ $writer->addAttribute('id',$this->getClientID());
+ }
+
+ public function regenerateToken()
+ {
+ // if we're in a callback, then schedule re-rendering of the control
+ // if not, don't do anything, because a new challenge will be rendered anyway
+ if ($this->Page->IsCallback)
+ $this->Page->CallbackClient->jQuery($this->getClientID().' #recaptcha_reload','click');
+ }
+
+ public function renderContents($writer)
+ {
+ $readyscript = 'jQuery(document).trigger('.TJavaScript::quoteString('captchaready:'.$this->getClientID()).')';
+ $cs = $this->Page->ClientScript;
+ $id = $this->getClientID();
+ $divid = $id.'_1_recaptchadiv';
+ $writer->write('<div id="'.htmlspecialchars($divid).'">');
+
+ if (!$this->Page->IsCallback)
+ {
+ $writer->write(TJavaScript::renderScriptBlock(
+ 'var RecaptchaOptions = '.TJavaScript::jsonEncode($this->getClientSideOptions()).';'
+ ));
+
+ $html = recaptcha_get_html($this->getPublicKey());
+ /*
+ reCAPTCHA currently does not support multiple validations per page
+ $html = str_replace(
+ array(self::ChallengeFieldName,self::ResponseFieldName),
+ array($this->getChallengeFieldName(),$this->getResponseFieldName()),
+ $html
+ );
+ */
+ $writer->write($html);
+
+ $cs->registerEndScript('ReCaptcha::EventScript', 'jQuery(document).ready(function() { '.$readyscript.'; } );');
+ }
+ else
+ {
+ $options = $this->getClientSideOptions();
+ $options['callback'] = new TJavaScriptLiteral('function() { '.$readyscript.'; '.$this->getCallbackScript().'; }');
+ $cs->registerScriptFile('ReCaptcha::AjaxScript', 'http://www.google.com/recaptcha/api/js/recaptcha_ajax.js');
+ $cs->registerEndScript('ReCaptcha::CreateScript::'.$id, implode(' ', array(
+ 'if (!jQuery('.TJavaScript::quoteString('#'.$this->getResponseFieldName()).'))',
+ '{',
+ 'Recaptcha.destroy();',
+ 'Recaptcha.create(',
+ TJavaScript::quoteString($this->getPublicKey()).', ',
+ TJavaScript::quoteString($divid).', ',
+ TJavaScript::encode($options),
+ ');',
+ '}',
+ )));
+ }
+
+ $writer->write('</div>');
+ }
+
+}