recaptcha_v2_field_renderer.inc

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<?php
/**************************************************************
 
Copyright (c) 2018 Sonjara, Inc
 
Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated documentation
files (the "Software"), to deal in the Software without
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HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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*****************************************************************/
 
Fakoli::usingFeature("field_renderers", "validation");
Fakoli::using("settings");
 
 
class RecaptchaV2Validator extends AbstractValidator
{
     var $message;
     var $compareField;       
     
     function __construct()
     {
          $this->message = "The code you entered did not match. Please try again.";
          $this->compareField = "recaptcha_response_field";
          $this->title = "Captcha";
          // Pass the field  name hello captcha creators give to the user input to compare against the test
          $this->AbstractValidator("recaptcha_user_answer", "Captcha");
     }
     
     function writeClient()
     {
          // No client-side component
          
          return "";
     }
     
     function validate()
     {
          if ($this->readOnly) return "";
          
          $secret_key = Settings::getValue("captcha", "recaptcha_secret_key");
          
          if (!isset($_POST["g-recaptcha-response"]) || $_POST["g-recaptcha-response"] === $this->empty)
          {
               return "{$this->title} is a required field.";
          }
          
          $data = array( "secret"  =>   $secret_key,
                              "response"     =>   $_POST["g-recaptcha-response"],
                              "remoteip"     =>   $_SERVER["REMOTE_ADDR"]);
          $response = postRemote(RecaptchaV2Manager::$verificationURL, $data);
          $result = json_decode($response);
          if ($result->success == false)
          {
               return "CAPTCHA failed";
          }
          
          return "";
     }
}
 
 
class RecaptchaV2FieldRenderer extends FieldRenderer
{
     function __construct(&$form)
     {
          parent::__construct($form);
          
          $this->field = "captcha";
          $form->add($this);
          
          $site_key = Settings::getValue("captcha", "recaptcha_site_key");
          $secret_key = Settings::getValue("captcha", "recaptcha_secret_key");
          
          if(!$site_key || !$secret_key)
          {
               throw new FakoliException("reCAPTCHA v2 keys must be provided in CMS Application Settings.");
          }
          
          $this->hideLabel = true;
          $this->colspan = 2;
          $form->validator->add(new RecaptchaV2Validator());
     }
     
     function renderScript($field)
     {
?>
     <script src='https://www.google.com/recaptcha/api.js'></script>
<?
     }
     
     function renderField($field = "")
     {
          $site_key = Settings::getValue("captcha", "recaptcha_site_key");
          
          if (!$field) $field = $this->field;
          
          $this->_startField($field);
?>
     <div class='captcha_wrapper'>
          <div class="g-recaptcha" data-sitekey="<?echo $site_key?>"></div>
     </div>
<?
          $this->_endField($field);
     }
}
?>