<?php
/**
 * IBSE
 *
 * Information Bot Service Engine
 *
 * @package		IBSE
 * @author		HSDN Team
 * @copyright	Copyright (c) 2006-2010, Information Networks Ltd.
 * @link		http://www.hsdn.org
 * @since		Version 4.0
 */

/**
 * IBAPI
 *
 * Information Bot Application Program Interface
 *
 * @package		IBSE
 * @author		HSDN Team
 * @copyright	Copyright (c) 2006-2010, Information Networks Ltd.
 * @since		Version 4.0
 */

// ------------------------------------------------------------------------

/**
 * Класс Antigate.com API
 *
 * @category	Libraries
 * @author		HSDN Team
 */
class Antigate
{
	/*
	 * Конфигурация
	 *
	 * @access	private
	 */
	private static $config = array();

	/*
	 * Ключ для работы с API
	 *
	 * @access	private
	 */
	private $apikey;

	/*
	 * Доменное имя сервиса
	 *
	 * @access	private
	 */
	private $host;

	/*
	 * Разрешенные типы изображений
	 *
	 * @access	private
	 */
	private $mime_allowed = array
	(
		'image/gif',
		'image/png',
		'image/jpeg',
		'image/jpg',
		'image/pjpeg'
	);


	/**
	 * Конструктор
	 *
	 * @access	public
	 * @return	void
	 */
	public function __construct()
	{
		$this->config = Management::get_config('Antigate');

		if (!function_exists('getimagesize'))
		{
			die('Not installed PHP extension: GD');
		}

		$this->http = new Http();
	}

	/**
	 * Отправить каптчу на распознание
	 *
	 * @access	public
	 * @param	string
	 * @param	string
	 * @param	string
	 * @param	string
	 * @param	string
	 * @param	string
	 * @param	string
	 * @return	mixed
	 */
	public function recognition($file, $is_phrase = 0, $is_regsense = 0, $is_numeric = 0, $min_len = 0, $max_len = 0, $is_russian = 0)
	{
		if (!$socket = $this->http->open($this->config['host']))
		{
			return FALSE;
		}

		if (is_file($file) OR strpos($file, '://') !== FALSE)
		{
			if (!$file_data = @file_get_contents($file) OR 
				!$file_info = @getimagesize($file) OR 
				!in_array($file_info['mime'], $this->mime_allowed))
			{
				return FALSE;
			}

			$mime = $file_info['mime'];
			$file_name = basename($file);
		}
		else
		{
			if (substr($file, 1, 3) == 'PNG')
			{
				$mime = 'image/png';
				$ext = 'png';
			}
			else if (substr($file, 0, 3) == 'GIF')
			{
				$mime = 'image/gif';
				$ext = 'gif';
			}
			else if (substr($file, 6, 4) == 'JFIF')
			{
				$mime = 'image/jpeg';
				$ext = 'jpeg';
			}
			else
			{
				return FALSE;
			}

			$file_data = $file;
			$file_name = 'capcha.'.$ext;
		}

		$boundary = '-----------------------------'.substr(md5(rand(0, 32000)), 0, 10);
		$body = '--'.$boundary."\r\n";
		$body .= 'Content-Disposition: form-data; name="method"'."\r\n\r\n".'post'."\r\n";
		$body .= '--'.$boundary."\r\n";
		$body .= 'Content-Disposition: form-data; name="key"'."\r\n\r\n".$this->config['apikey']."\r\n";
		$body .= '--'.$boundary."\r\n";
		$body .= 'Content-Disposition: form-data; name="phrase"'."\r\n\r\n".$is_phrase."\r\n";
		$body .= '--'.$boundary."\r\n";
		$body .= 'Content-Disposition: form-data; name="regsense"'."\r\n\r\n".$is_regsense."\r\n";
		$body .= '--'.$boundary."\r\n";
		$body .= 'Content-Disposition: form-data; name="numeric"'."\r\n\r\n".$is_numeric."\r\n";
		$body .= '--'.$boundary."\r\n";
		$body .= 'Content-Disposition: form-data; name="min_len"'."\r\n\r\n".$min_len."\r\n";
		$body .= '--'.$boundary."\r\n";
		$body .= 'Content-Disposition: form-data; name="max_len"'."\r\n\r\n".$max_len."\r\n";
		$body .= '--'.$boundary."\r\n";
		$body .= 'Content-Disposition: form-data; name="is_russian"'."\r\n\r\n".$is_russian."\r\n";
		$body .= '--'.$boundary."\r\n";
		$body .= 'Content-Disposition: form-data; name="file"; filename="'.$file_name.'"'."\r\n";
		$body .= 'Content-Type: '.$mime."\r\n\r\n";
		$body .= $file_data."\r\n";
		$body .= '--'.$boundary.'--'."\r\n";

		$headers = array
		(
			'Host' => $this->config['host'],
			'User-Agent' => 'HSDN antigate client/1',
			'Content-Type' => 'multipart/form-data; boundary='.$boundary,
			'Content-Length' => strlen($body),
			'Connection' => 'close'
		);

		$request = $this->http->generate_request('POST', '/in.php', $headers, $body);
		$this->http->write($socket, $request);
		$content = $this->http->get_content($socket);
		$this->http->close($socket);

		if ($this->http->validate_content($content, 200))
		{
			if (strpos($content['body'], 'ERROR') !== FALSE OR strpos($content['body'], '<HTML>') !== FALSE)
			{
				return FALSE;
			}
			
			list(, $captcha_id) = explode('|', $content['body']);
			$waittime = 0;

			sleep($this->config['read_timeout']);

			while(TRUE)
			{
				$captcha_info = $this->action('get', array('id' => $captcha_id));

				if ($captcha_info === FALSE OR strpos($captcha_info, 'ERROR') !== FALSE)
				{
					return FALSE;
				}

				if ($captcha_info == 'CAPCHA_NOT_READY')
				{
					$waittime += $this->config['read_timeout'];

					if ($waittime > $this->config['recognition_timeout']) 
					{
						return FALSE;
					}

					sleep($this->config['read_timeout']);
				}
				else
				{
					list($status, $code) = explode('|', $captcha_info);

					if (trim($status) == 'OK')
					{
						return trim($code);
					}
				}
			}
		}

		return FALSE;
	}

	/**
	 * Отправить запрос action к сервису (получение баланса, статуса каптчи и т.д.)
	 *
	 * @access	public
	 * @param	string
	 * @param	array
	 * @return	mixed
	 */
	public function action($value, $params = array())
	{
		if (!$socket = $this->http->open($this->config['host']))
		{
			return FALSE;
		}

		$params['key'] = $this->config['apikey'];
		$params['action'] = $value;

		$headers = array
		(
			'Host' => $this->config['host'],
			'User-Agent' => 'HSDN antigate client/1',
			'Connection' => 'close'
		);

		$request = $this->http->generate_request('GET', '/res.php?'.http_build_query($params), $headers);
		$this->http->write($socket, $request);
		$content = $this->http->get_content($socket);
		$this->http->close($socket);

		if ($this->http->validate_content($content, 200))
		{
			return $content['body'];
		}

		return FALSE;
	}
}

/* End of file */