/**

*

* @package VC

* @copyright (c) 2006 2008 phpBB Group

* @license http://opensource.org/licenses/gpl-license.php GNU Public License

*

function init($type)

{

global $config, $db, $user;

// read input

$this->confirm_id = request_var('confirm_id', '');

$this->confirm_code = request_var('confirm_code', '');

$this->type = (int) $type;

if (!strlen($this->confirm_id))

{

// we have no confirm ID, better get ready to display something

$this->generate_code();

}

}

function execute_demo()

{

global $user;

$this->code = gen_rand_string(mt_rand(5, 8));

$this->seed = hexdec(substr(unique_id(), 4, 10));

// compute $seed % 0x7fffffff

$this->seed -= 0x7fffffff * floor($this->seed / 0x7fffffff);

captcha::execute($this->code, $this->seed);

}

function execute()

{

if (empty($this->code))

}

captcha::execute($this->code, $this->seed);

}

function get_template()

{

global $config, $user, $template;

$template->set_filenames(array(

'captcha' => 'captcha_default.html')

);

$template->assign_vars(array(

'CONFIRM_IMAGE' => append_sid('ucp', 'mode=confirm&confirm_id=' . $this->confirm_id . '&type=' . $this->type),

'CONFIRM_ID' => $this->confirm_id,

));

return $template->assign_display('captcha');

}

function get_demo_template($id)

{

global $config, $user, $template;

$template->set_filenames(array(

'captcha_demo' => 'captcha_default_acp_demo.html')

);

'CONFIRM_IMAGE' => append_sid(PHPBB_ADMIN_PATH . 'index.' . PHP_EXT, 'captcha_demo=1&mode=visual&i=' . $id . '&select_captcha=' . $this->get_class_name()),

'CONFIRM_ID' => $this->confirm_id,

));

return $template->assign_display('captcha_demo');

}

function get_hidden_fields()

{

$hidden_fields = array();

// this is required for postig.php - otherwise we would forget about the captcha being already solved

if ($this->solved)

{

$hidden_fields['confirm_id'] = $this->confirm_id;

return $hidden_fields;

}

static function garbage_collect($type)

{

global $db, $config;

}

$db->sql_freeresult($result);

}

function uninstall()

{

self::garbage_collect(0);

}

function install()

{

return;

}

function validate()

{

global $config, $db, $user;

$this->confirm_code = request_var('confirm_code', '');

if (!$this->confirm_id)

{

$error = $user->lang['CONFIRM_CODE_WRONG'];

$error = $user->lang['CONFIRM_CODE_WRONG'];

}

}

if (strlen($error))

{

// okay, inorect answer. Let's ask a new question

return false;

}

}

/**

* The old way to generate code, suitable for GD and non-GD. Resets the internal state.

*/

protected function generate_code()

{

global $db, $user;

$this->code = gen_rand_string(mt_rand(5, 8));

$this->confirm_id = md5(unique_id($user->ip));

$this->seed = hexdec(substr(unique_id(), 4, 10));

);

$db->sql_query($sql);

}

/**

*/

protected function load_code()

{

return true;

}

return false;

}

protected function check_code()

{

global $db;

if (empty($this->code))

{

if (!$this->load_code())

}

return (strcasecmp($this->code, $this->confirm_code) === 0);

}

protected function delete_code()

{

global $db, $user;

$sql = 'DELETE FROM ' . CONFIRM_TABLE . "

WHERE confirm_id = '" . $db->sql_escape($confirm_id) . "'

AND session_id = '" . $db->sql_escape($user->session_id) . "'

AND confirm_type = " . $this->type;

$db->sql_query($sql);

}

function get_attempt_count()

{

global $db, $user;

$sql = 'SELECT COUNT(session_id) AS attempts

FROM ' . CONFIRM_TABLE . "

WHERE session_id = '" . $db->sql_escape($user->session_id) . "'

$result = $db->sql_query($sql);

$attempts = (int) $db->sql_fetchfield('attempts');

$db->sql_freeresult($result);

return $attempts;

}

function reset()

{

global $db, $user;

$sql = 'DELETE FROM ' . CONFIRM_TABLE . "

WHERE session_id = '" . $db->sql_escape($user->session_id) . "'

AND confirm_type = " . (int) $this->type;

$db->sql_query($sql);

// we leave the class usable by generating a new question

$this->generate_code();

}

}