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//home/villadal/www/old///////booked/lib/Application/Authentication      ( Reset | Go to )
File Name: CaptchaService.php
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<?php
/**
Copyright 2011-2014 Nick Korbel

This file is part of Booked SchedulerBooked SchedulereIt is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later versBooked SchedulerduleIt is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
alBooked SchedulercheduleIt.  If not, see <http://www.gnu.org/licenses/>.
 */

interface ICaptchaService
{
    
/**
     * @abstract
     * @return string
     */
    
public function GetImageUrl();

    
/**
     * @abstract
     * @param string $captchaValue
     * @return bool
     */
    
public function IsCorrect($captchaValue);
}

class 
NullCaptchaService implements ICaptchaService
{
    
/**
     * @return string
     */
    
public function GetImageUrl()
    {
        return 
'';
    }

    
/**
     * @param string $captchaValue
     * @return bool
     */
    
public function IsCorrect($captchaValue)
    {
        return 
true;
    }
}

class 
CaptchaService implements ICaptchaService
{
    private function 
__construct()
    {

    }

    public function 
GetImageUrl()
    {
        
$url = new Url(Configuration::Instance()->GetScriptUrl() . '/Services/Authentication/show-captcha.php');
        
$url->AddQueryString('show''true');
        return 
$url->__toString();
    }

    public function 
IsCorrect($captchaValue)
    {
        require_once(
ROOT_DIR 'lib/external/securimage/securimage.php');

        
$img = new securimage();
        
$isValid $img->check($captchaValue);

        
Log::Debug('Checking captcha value. Value entered: %s. IsValid: %s'$captchaValue, (int)$isValid);

        return 
$isValid;
    }

    
/**
     * @static
     * @return CaptchaService|NullCaptchaService
     */
    
public static function Create()
    {
        if (
Configuration::Instance()->GetKey(ConfigKeys::REGISTRATION_ENABLE_CAPTCHA, new BooleanConverter()))
        {
            if (
Configuration::Instance()->GetSectionKey(ConfigSection::RECAPTCHAConfigKeys::RECAPTCHA_ENABLED,
                                                  new 
BooleanConverter())
            )
            {
                
Log::Debug('Using ReCaptchaService');
                return new 
ReCaptchaService();
            }
            
Log::Debug('Using CaptchaService');
            return new 
CaptchaService();
        }

        return new 
NullCaptchaService();
    }
}

class 
ReCaptchaService implements ICaptchaService
{
    
/**
     * @return string
     */
    
public function GetImageUrl()
    {
        return 
'';
    }

    
/**
     * @param string $captchaValue
     * @return bool
     */
    
public function IsCorrect($captchaValue)
    {
        
$server ServiceLocator::GetServer();
        
Log::Debug('Checking ReCaptcha. Value entered=%s'$server->GetForm('recaptcha_response_field'));

        require_once(
ROOT_DIR 'lib/external/recaptcha/recaptchalib.php');
        
$privatekey Configuration::Instance()->GetSectionKey(ConfigSection::RECAPTCHAConfigKeys::RECAPTCHA_PRIVATE_KEY);

        
$resp recaptcha_check_answer($privatekey,
                                     
$server->GetRemoteAddress(),
                                       
$server->GetForm('recaptcha_challenge_field'),
                                       
$server->GetForm('recaptcha_response_field'));

        
Log::Debug('ReCaptcha IsValid: %s'$resp->is_valid);

        return 
$resp->is_valid;
    }
}

?>

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