install.php
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Created: Thu, Feb 27, 12:22 AM

install.php
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	<?php
	/**
	* @version $Id: install.php 14609 2011-10-03 13:05:08Z alex $
	* @package In-Portal
	* @copyright Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
	* @license GNU/GPL
	* In-Portal is Open Source software.
	* This means that this software may have been modified pursuant
	* the GNU General Public License, and as distributed it includes
	* or is derivative of works licensed under the GNU General Public License
	* or other free or open source software licenses.
	* See http://www.in-portal.org/license for copyright notices and details.
	*/
	ini_set('display_errors', 1);
	error_reporting(E_ALL);

	define('IS_INSTALL', 1);
	define('ADMIN', 1);
	define('FULL_PATH', realpath(dirname(__FILE__).'/..') );
	define('REL_PATH', '/core');

	// run installator
	$install_engine = new kInstallator();
	$install_engine->Init();
	$install_engine->Run();
	$install_engine->Done();

	class kInstallator {

	/**
	* Reference to kApplication class object
	*
	* @var kApplication
	*/
	var $Application = null;

	/**
	* Connection to database
	*
	* @var kDBConnection
	*/
	var $Conn = null;

	/**
	* XML file containing steps information
	*
	* @var string
	*/
	var $StepDBFile = '';

	/**
	* Step name, that currently being processed
	*
	* @var string
	*/
	var $currentStep = '';

	/**
	* Steps list (preset) to use for current installation
	*
	* @var string
	*/
	var $stepsPreset = '';

	/**
	* Installtion steps to be done
	*
	* @var Array
	*/
	var $steps = Array (
	'fresh_install' => Array ('check_paths', 'db_config', 'select_license', /'download_license',/ 'select_domain', 'root_password', 'choose_modules', 'post_config', 'select_theme', 'security', 'finish'),
	'clean_reinstall' => Array ('check_paths', 'clean_db', 'db_config', 'select_license', /'download_license',/ 'select_domain', 'root_password', 'choose_modules', 'post_config', 'select_theme', 'security', 'finish'),
	'already_installed' => Array ('check_paths', 'install_setup'),

	'upgrade' => Array ('check_paths', 'install_setup', 'upgrade_modules', 'skin_upgrade', 'security', 'finish'),
	'update_license' => Array ('check_paths', 'install_setup', 'select_license', /'download_license',/ 'select_domain', 'security', 'finish'),
	'db_reconfig' => Array ('check_paths', 'install_setup', 'db_reconfig', 'security', 'finish'),
	'fix_paths' => Array ('check_paths', 'install_setup', 'fix_paths', 'security', 'finish'),
	);

	/**
	* Steps, that doesn't required admin to be logged-in to proceed
	*
	* @var Array
	*/
	var $skipLoginSteps = Array ('check_paths', 'select_license', /'download_license',/ 'select_domain', 'root_password', 'choose_modules', 'post_config', 'select_theme', 'security', 'finish', -1);

	/**
	* Steps, on which kApplication should not be initialized, because of missing correct db table structure
	*
	* @var Array
	*/
	var $skipApplicationSteps = Array ('check_paths', 'clean_db', 'db_config', 'db_reconfig' /, 'install_setup'/); // remove install_setup when application will work separately from install

	/**
	* Folders that should be writeable to continue installation. $1 - main writeable folder from config.php ("/system" by default)
	*
	* @var Array
	*/
	var $writeableFolders = Array (
	'$1',
	'$1/.restricted',
	'$1/images',
	'$1/images/pending',
	'$1/images/emoticons', // for "In-Bulletin"
	'$1/user_files',
	'$1/cache',
	);

	/**
	* Contains last error message text
	*
	* @var string
	*/
	var $errorMessage = '';

	/**
	* Base path for includes in templates
	*
	* @var string
	*/
	var $baseURL = '';

	/**
	* Holds number of last executed query in the SQL
	*
	* @var int
	*/
	var $LastQueryNum = 0;

	/**
	* Dependencies, that should be used in upgrade process
	*
	* @var Array
	*/
	var $upgradeDepencies = Array ();

	/**
	* Log of upgrade - list of upgraded modules and their versions
	*
	* @var Array
	*/
	var $upgradeLog = Array ();

	/**
	* Common tools required for installation process
	*
	* @var kInstallToolkit
	*/
	var $toolkit = null;

	function Init()
	{
	include_once(FULL_PATH . REL_PATH . '/kernel/kbase.php'); // required by kDBConnection class
	include_once(FULL_PATH . REL_PATH . '/kernel/utility/multibyte.php'); // emulating multi-byte php extension
	require_once(FULL_PATH . REL_PATH . '/install/install_toolkit.php'); // toolkit required for module installations to installator
	$this->toolkit = new kInstallToolkit();
	$this->toolkit->setInstallator($this);

	$this->StepDBFile = FULL_PATH.'/'.REL_PATH.'/install/steps_db.xml';

	$base_path = rtrim(preg_replace('/'.preg_quote(rtrim(REL_PATH, '/'), '/').'$/', '', str_replace('\\', '/', dirname($_SERVER['PHP_SELF']))), '/');
	$this->baseURL = 'http://'.$_SERVER['HTTP_HOST'].$base_path.'/core/install/';

	set_error_handler( Array(&$this, 'ErrorHandler') );

	if (file_exists($this->toolkit->INIFile)) {
	// if config.php found, then check his write permission too
	$this->writeableFolders[] = $this->toolkit->defaultWritablePath . '/config.php';
	}

	if ( !$this->toolkit->getSystemConfig('Misc', 'WriteablePath') ) {
	// set global writable folder when such setting is missing
	$this->toolkit->setSystemConfig('Misc', 'WriteablePath', $this->toolkit->defaultWritablePath);
	$this->toolkit->SaveConfig(true); // immediately save, because this path will be used in Application later
	}

	if ( !$this->toolkit->getSystemConfig('Misc', 'RestrictedPath') ) {
	$this->toolkit->setSystemConfig('Misc', 'RestrictedPath', $this->toolkit->getSystemConfig('Misc', 'WriteablePath') . DIRECTORY_SEPARATOR . '.restricted');
	$this->toolkit->SaveConfig(true);
	}

	$this->currentStep = $this->GetVar('step');

	// can't check login on steps where no application present anyways :)
	$this->skipLoginSteps = array_unique(array_merge($this->skipLoginSteps, $this->skipApplicationSteps));

	$this->SelectPreset();

	if (!$this->currentStep) {
	$this->SetFirstStep(); // sets first step of current preset
	}

	$this->InitStep();
	}

	function SetFirstStep()
	{
	reset($this->steps[$this->stepsPreset]);
	$this->currentStep = current($this->steps[$this->stepsPreset]);
	}

	/**
	* Selects preset to proceed based on various criteria
	*
	*/
	function SelectPreset()
	{
	$preset = $this->GetVar('preset');
	if ($this->toolkit->systemConfigFound()) {
	// only at installation first step
	$status = $this->CheckDatabase(false);
	if ($status && $this->AlreadyInstalled()) {
	// if already installed, then all future actions need login to work
	$this->skipLoginSteps = Array ('check_paths', -1);
	if (!$preset) {
	$preset = 'already_installed';
	$this->currentStep = '';
	}
	}
	}
	if ($preset === false) {
	$preset = 'fresh_install'; // default preset
	}

	$this->stepsPreset = $preset;
	}

	/**
	* Returns variable from request
	*
	* @param string $name
	* @return string\|bool
	* @access private
	*/
	private function GetVar($name)
	{
	return array_key_exists($name, $_REQUEST) ? $_REQUEST[$name] : false;
	}

	/**
	* Sets new value for request variable
	*
	* @param string $name
	* @param mixed $value
	* @return void
	* @access private
	*/
	private function SetVar($name, $value)
	{
	$_REQUEST[$name] = $value;
	}

	/**
	* Performs needed intialization of data, that step requires
	*
	*/
	function InitStep()
	{
	$require_login = !in_array($this->currentStep, $this->skipLoginSteps);
	$this->InitApplication($require_login);

	if ($require_login) {
	// step require login to proceed
	if (!$this->Application->LoggedIn()) {
	$this->stepsPreset = 'already_installed';
	$this->currentStep = 'install_setup'; // manually set 2nd step, because 'check_paths' step doesn't contain login form
	// $this->SetFirstStep();
	}
	}

	switch ($this->currentStep) {
	case 'check_paths':
	$writeable_base = $this->toolkit->getSystemConfig('Misc', 'WriteablePath');
	foreach ($this->writeableFolders as $folder_path) {
	$file_path = FULL_PATH . str_replace('$1', $writeable_base, $folder_path);
	if (file_exists($file_path) && !is_writable($file_path)) {
	$this->errorMessage = '<br/>Installation can not continue until all required permissions are set correctly';
	break;
	}
	}
	break;

	case 'clean_db':
	// don't use Application, because all tables will be erased and it will crash
	$sql = 'SELECT Path
	FROM ' . TABLE_PREFIX . 'Modules';
	$modules = $this->Conn->GetCol($sql);

	foreach ($modules as $module_folder) {
	$remove_file = '/' . $module_folder . 'install/remove_schema.sql';
	if (file_exists(FULL_PATH . $remove_file)) {
	$this->toolkit->RunSQL($remove_file);
	}
	}

	$this->toolkit->deleteEditTables();

	$this->currentStep = $this->GetNextStep();
	break;

	case 'db_config':
	case 'db_reconfig':
	$fields = Array (
	'DBType', 'DBHost', 'DBName', 'DBUser',
	'DBUserPassword', 'DBCollation', 'TablePrefix'
	);

	// set fields
	foreach ($fields as $field_name) {
	$submit_value = $this->GetVar($field_name);

	if ($submit_value !== false) {
	$this->toolkit->setSystemConfig('Database', $field_name, $submit_value);
	}
	/*else {
	$this->toolkit->setSystemConfig('Database', $field_name, '');
	}*/
	}
	break;

	case 'download_license':
	$license_source = $this->GetVar('license_source');
	if ($license_source !== false && $license_source != 1) {
	// previous step was "Select License" and not "Download from Intechnic" option was selected
	$this->currentStep = $this->GetNextStep();
	}
	break;

	case 'choose_modules':
	// if no modules found, then proceed to next step
	$modules = $this->ScanModules();
	if (!$modules) {
	$this->currentStep = $this->GetNextStep();
	}
	break;

	case 'select_theme':
	// put available theme list in database
	$this->toolkit->rebuildThemes();
	break;

	case 'upgrade_modules':
	// get installed modules from db and compare their versions to upgrade script
	$modules = $this->GetUpgradableModules();
	if (!$modules) {
	$this->currentStep = $this->GetNextStep();
	}
	break;

	case 'skin_upgrade':
	if ($this->Application->RecallVar('SkinUpgradeLog') === false) {
	// no errors during skin upgrade -> skip this step
	$this->currentStep = $this->GetNextStep();
	}
	break;

	case 'install_setup':
	$next_preset = $this->Application->GetVar('next_preset');
	if ($next_preset !== false) {
	$user_helper =& $this->Application->recallObject('UserHelper');
	/* @var $user_helper UserHelper */

	$username = $this->Application->GetVar('login');
	$password = $this->Application->GetVar('password');

	if ($username == 'root') {
	// verify "root" user using configuration settings
	$login_result = $user_helper->loginUser($username, $password);

	if ($login_result != LoginResult::OK) {
	$error_phrase = $login_result == LoginResult::NO_PERMISSION ? 'la_no_permissions' : 'la_invalid_password';
	$this->errorMessage = $this->Application->Phrase($error_phrase) . '. If you don\'t know your username or password, contact Intechnic Support';
	}
	}
	else {
	// non "root" user -> verify using licensing server
	$url_params = Array (
	'login' => md5($username),
	'password' => md5($password),
	'action' => 'check',
	'license_code' => base64_encode( $this->toolkit->getSystemConfig('Intechnic', 'LicenseCode') ),
	'version' => '4.3.0',//$this->toolkit->GetMaxModuleVersion('core/'),
	'domain' => base64_encode($_SERVER['HTTP_HOST']),
	);

	$curl_helper =& $this->Application->recallObject('CurlHelper');
	/* @var $curl_helper kCurlHelper */

	$curl_helper->SetRequestData($url_params);
	$file_data = $curl_helper->Send(GET_LICENSE_URL);

	if ( !$curl_helper->isGoodResponceCode() ) {
	$this->errorMessage = 'In-Portal servers temporarily unavailable. Please contact <a href="mailto:support@in-portal.com">In-Portal support</a> personnel directly.';
	}
	elseif (substr($file_data, 0, 5) == 'Error') {
	$this->errorMessage = substr($file_data, 6) . ' If you don\'t know your username or password, contact Intechnic Support';
	}

	if ($this->errorMessage == '') {
	$user_helper->loginUserById(USER_ROOT);
	}
	}

	if ($this->errorMessage == '') {
	// processed with redirect to selected step preset
	if (!isset($this->steps[$next_preset])) {
	$this->errorMessage = 'Preset "'.$next_preset.'" not yet implemented';
	}
	else {
	$this->stepsPreset = $next_preset;
	}
	}
	}
	else {
	// if preset was not choosen, then raise error
	$this->errorMessage = 'Please select action to perform';
	}
	break;

	case 'security':
	// perform write check
	if ($this->Application->GetVar('skip_security_check')) {
	// administrator intensionally skips security checks
	break;
	}

	$write_check = true;
	$check_paths = Array ('/', '/index.php', $this->toolkit->defaultWritablePath . '/config.php', ADMIN_DIRECTORY . '/index.php');
	foreach ($check_paths as $check_path) {
	$path_check_status = $this->toolkit->checkWritePermissions(FULL_PATH . $check_path);

	if (is_bool($path_check_status) && $path_check_status) {
	$write_check = false;
	break;
	}
	}

	// script execute check
	if (file_exists(WRITEABLE . '/install_check.php')) {
	unlink(WRITEABLE . '/install_check.php');
	}

	$fp = fopen(WRITEABLE . '/install_check.php', 'w');
	fwrite($fp, "<?php\n\techo 'OK';\n");
	fclose($fp);

	$curl_helper =& $this->Application->recallObject('CurlHelper');
	/* @var $curl_helper kCurlHelper */

	$output = $curl_helper->Send($this->Application->BaseURL(WRITEBALE_BASE) . 'install_check.php');
	unlink(WRITEABLE . '/install_check.php');
	$execute_check = ($output !== 'OK');

	$directive_check = true;
	$ini_vars = Array ('register_globals' => false, 'open_basedir' => true, 'allow_url_fopen' => false);
	foreach ($ini_vars as $var_name => $var_value) {
	$current_value = ini_get($var_name);

	if (($var_value && !$current_value) \|\| (!$var_value && $current_value)) {
	$directive_check = false;
	break;
	}
	}

	if (!$write_check \|\| !$execute_check \|\| !$directive_check) {
	$this->errorMessage = true;
	}
	/*else {
	$this->currentStep = $this->GetNextStep();
	}*/
	break;
	}

	$this->PerformValidation(); // returns validation status (just in case)
	}

	/**
	* Validates data entered by user
	*
	* @return bool
	*/
	function PerformValidation()
	{
	if ($this->GetVar('step') != $this->currentStep) {
	// just redirect from previous step, don't validate
	return true;
	}

	$status = true;

	switch ($this->currentStep) {
	case 'db_config':
	case 'db_reconfig':
	// 1. check if required fields are filled
	$section_name = 'Database';
	$required_fields = Array ('DBType', 'DBHost', 'DBName', 'DBUser', 'DBCollation');
	foreach ($required_fields as $required_field) {
	if (!$this->toolkit->getSystemConfig($section_name, $required_field)) {
	$status = false;
	$this->errorMessage = 'Please fill all required fields';
	break;
	}
	}
	if (!$status) break;

	// 2. check permissions, that use have in this database
	$status = $this->CheckDatabase(($this->currentStep == 'db_config') && !$this->GetVar('UseExistingSetup'));
	break;

	case 'select_license':
	$license_source = $this->GetVar('license_source');
	if ($license_source == 2) {
	// license from file -> file must be uploaded
	$upload_error = $_FILES['license_file']['error'];
	if ($upload_error != UPLOAD_ERR_OK) {
	$this->errorMessage = 'Missing License File';
	}
	}
	elseif (!is_numeric($license_source)) {
	$this->errorMessage = 'Please select license';
	}

	$status = $this->errorMessage == '';
	break;

	case 'root_password':
	// check, that password & verify password match
	$password = $this->Application->GetVar('root_password');
	$password_verify = $this->Application->GetVar('root_password_verify');

	if ($password != $password_verify) {
	$this->errorMessage = 'Passwords does not match';
	}
	elseif (mb_strlen($password) < 4) {
	$this->errorMessage = 'Root Password must be at least 4 characters';
	}

	$status = $this->errorMessage == '';
	break;

	case 'choose_modules':
	break;

	case 'upgrade_modules':
	$modules = $this->Application->GetVar('modules');
	if (!$modules) {
	$modules = Array ();
	$this->errorMessage = 'Please select module(-s) to ' . ($this->currentStep == 'choose_modules' ? 'install' : 'upgrade');
	}

	// check interface module
	$upgrade_data = $this->GetUpgradableModules();

	if (array_key_exists('core', $upgrade_data) && !in_array('core', $modules)) {
	// core can be upgraded, but isn't selected
	$this->errorMessage = 'Please select "Core" as interface module';
	}

	$status = $this->errorMessage == '';
	break;
	}

	return $status;
	}

	/**
	* Perform installation step actions
	*
	*/
	function Run()
	{
	if ($this->errorMessage) {
	// was error during data validation stage
	return ;
	}

	switch ($this->currentStep) {
	case 'db_config':
	case 'db_reconfig':
	// store db configuration
	$sql = 'SHOW COLLATION
	LIKE \''.$this->toolkit->getSystemConfig('Database', 'DBCollation').'\'';
	$collation_info = $this->Conn->Query($sql);
	if ($collation_info) {
	$this->toolkit->setSystemConfig('Database', 'DBCharset', $collation_info[0]['Charset']);

	// database is already connected, that's why set collation on the fly
	$this->Conn->Query('SET NAMES \''.$this->toolkit->getSystemConfig('Database', 'DBCharset').'\' COLLATE \''.$this->toolkit->getSystemConfig('Database', 'DBCollation').'\'');
	}

	$this->toolkit->SaveConfig();

	if ($this->currentStep == 'db_config') {
	if ($this->GetVar('UseExistingSetup')) {
	// abort clean install and redirect to already_installed
	$this->stepsPreset = 'already_installed';
	break;
	}

	// import base data into new database, not for db_reconfig
	$this->toolkit->RunSQL('/core/install/install_schema.sql');
	$this->toolkit->RunSQL('/core/install/install_data.sql');

	// create category using sql, because Application is not available here
	$table_name = $this->toolkit->getSystemConfig('Database', 'TablePrefix') . 'IdGenerator';
	$this->Conn->Query('UPDATE ' . $table_name . ' SET lastid = lastid + 1');
	$resource_id = $this->Conn->GetOne('SELECT lastid FROM ' . $table_name);
	if ($resource_id === false) {
	$this->Conn->Query('INSERT INTO '.$table_name.' (lastid) VALUES (2)');
	$resource_id = 2;
	}

	$fields_hash = Array (
	'l1_Name' => 'Content', 'Filename' => 'Content', 'AutomaticFilename' => 0,
	'CreatedById' => USER_ROOT, 'CreatedOn' => time(), 'ResourceId' => $resource_id - 1,
	'l1_Description' => 'Content', 'Status' => 4,
	);

	$this->Conn->doInsert($fields_hash, $this->toolkit->getSystemConfig('Database', 'TablePrefix') . 'Category');

	$this->toolkit->SetModuleRootCategory('Core', $this->Conn->getInsertID());

	// set module "Core" version after install (based on upgrade scripts)
	$this->toolkit->SetModuleVersion('Core', 'core/');

	// for now we set "In-Portal" module version to "Core" module version (during clean install)
	$this->toolkit->SetModuleVersion('In-Portal', 'core/');
	}
	break;

	case 'select_license':
	// reset memory cache, when application is first available (on fresh install and clean reinstall steps)
	$this->Application->HandleEvent($event, 'adm:OnResetMemcache');

	$license_source = $this->GetVar('license_source');
	switch ($license_source) {
	case 1: // Download from Intechnic

	break;

	case 2: // Upload License File
	$file_data = array_map('trim', file($_FILES['license_file']['tmp_name']));
	if ((count($file_data) == 3) && $file_data[1]) {
	$modules_helper =& $this->Application->recallObject('ModulesHelper');
	/* @var $modules_helper kModulesHelper */

	if ($modules_helper->verifyLicense($file_data[1])) {
	$this->toolkit->setSystemConfig('Intechnic', 'License', $file_data[1]);
	$this->toolkit->setSystemConfig('Intechnic', 'LicenseCode', $file_data[2]);
	$this->toolkit->SaveConfig();
	}
	else {
	$this->errorMessage = 'Invalid License File';
	}
	}
	else {
	$this->errorMessage = 'Invalid License File';
	}
	break;

	case 3: // Use Existing License
	$license_hash = $this->toolkit->getSystemConfig('Intechnic', 'License');
	if ($license_hash) {
	$modules_helper =& $this->Application->recallObject('ModulesHelper');
	/* @var $modules_helper kModulesHelper */

	if (!$modules_helper->verifyLicense($license_hash)) {
	$this->errorMessage = 'Invalid or corrupt license detected';
	}
	}
	else {
	// happens, when browser's "Back" button is used
	$this->errorMessage = 'Missing License File';
	}
	break;

	case 4: // Skip License (Local Domain Installation)
	if ($this->toolkit->sectionFound('Intechnic')) {
	// remove any previous license information
	$this->toolkit->setSystemConfig('Intechnic', 'License');
	$this->toolkit->setSystemConfig('Intechnic', 'LicenseCode');
	$this->toolkit->SaveConfig();
	}
	break;
	}
	break;

	case 'download_license':
	$license_login = $this->GetVar('login');
	$license_password = $this->GetVar('password');
	$license_id = $this->GetVar('licenses');

	$curl_helper =& $this->Application->recallObject('CurlHelper');
	/* @var $curl_helper kCurlHelper */

	if (strlen($license_login) && strlen($license_password) && !$license_id) {
	// Here we determine weather login is ok & check available licenses
	$url_params = Array (
	'login' => md5($license_login),
	'password' => md5($license_password),
	'version' => $this->toolkit->GetMaxModuleVersion('core/'),
	'domain' => base64_encode($_SERVER['HTTP_HOST']),
	);

	$curl_helper->SetRequestData($url_params);
	$file_data = $curl_helper->Send(GET_LICENSE_URL);

	if (!$file_data) {
	// error connecting to licensing server
	$this->errorMessage = 'Unable to connect to the Intechnic server! Please try again later!';
	}
	else {
	if (substr($file_data, 0, 5) == 'Error') {
	// after processing data server returned error
	$this->errorMessage = substr($file_data, 6);
	}
	else {
	// license received
	if (substr($file_data, 0, 3) == 'SEL') {
	// we have more, then one license -> let user choose
	$this->SetVar('license_selection', base64_encode( substr($file_data, 4) )); // we received html with radio buttons with names "licenses"
	$this->errorMessage = 'Please select which license to use';
	}
	else {
	// we have one license
	$this->toolkit->processLicense($file_data);
	}
	}
	}
	}
	else if (!$license_id) {
	// licenses were not queried AND user/password missing
	$this->errorMessage = 'Incorrect Username or Password. If you don\'t know your username or password, contact Intechnic Support';
	}
	else {
	// Here we download license
	$url_params = Array (
	'license_id' => md5($license_id),
	'dlog' => md5($license_login),
	'dpass' => md5($license_password),
	'version' => $this->toolkit->GetMaxModuleVersion('core/'),
	'domain' => base64_encode($_SERVER['HTTP_HOST']),
	);

	$curl_helper->SetRequestData($url_params);
	$file_data = $curl_helper->Send(GET_LICENSE_URL);

	if (!$file_data) {
	// error connecting to licensing server
	$this->errorMessage = 'Unable to connect to the Intechnic server! Please try again later!';
	}
	else {
	if (substr($file_data, 0, 5) == 'Error') {
	// after processing data server returned error
	$this->errorMessage = substr($file_data, 6);
	}
	else {
	$this->toolkit->processLicense($file_data);
	}
	}
	}
	break;

	case 'select_domain':
	$modules_helper =& $this->Application->recallObject('ModulesHelper');
	/* @var $modules_helper kModulesHelper */

	// get domain name as entered by user on the form
	$domain = $this->GetVar('domain') == 1 ? $_SERVER['HTTP_HOST'] : str_replace(' ', '', $this->GetVar('other'));

	$license_hash = $this->toolkit->getSystemConfig('Intechnic', 'License');
	if ($license_hash) {
	// when license present, then extract domain from it
	$license_hash = base64_decode($license_hash);
	list ( , , $license_keys) = $modules_helper->_ParseLicense($license_hash);
	$license_domain = $license_keys[0]['domain'];
	}
	else {
	// when license missing, then use current domain or domain entered by user
	$license_domain = $domain;
	}

	if ($domain != '') {
	if (strstr($domain, $license_domain) \|\| $modules_helper->_IsLocalSite($domain)) {
	$this->toolkit->setSystemConfig('Misc', 'Domain', $domain);
	$this->toolkit->SaveConfig();
	}
	else {
	$this->errorMessage = 'Domain name entered does not match domain name in the license!';
	}
	}
	else {
	$this->errorMessage = 'Please enter valid domain!';
	}
	break;

	case 'root_password':
	// update root password in database
	$password = md5( md5($this->Application->GetVar('root_password')) . 'b38');

	$config_values = Array (
	'RootPass' => $password,
	'Site_Path' => BASE_PATH.'/', // set Site_Path (for SSL & old in-portal code)
	'Backup_Path' => FULL_PATH . $this->toolkit->getSystemConfig('Misc', 'WriteablePath') . DIRECTORY_SEPARATOR . 'backupdata',
	'Smtp_AdminMailFrom' => 'portal@' . $this->toolkit->getSystemConfig('Misc', 'Domain')
	);

	$site_timezone = ini_get('date.timezone') ? ini_get('date.timezone') : getenv('TZ');

	if ($site_timezone) {
	$config_values['Config_Site_Time'] = $site_timezone;
	}

	$this->toolkit->saveConfigValues($config_values);

	$user_helper =& $this->Application->recallObject('UserHelper');
	/* @var $user_helper UserHelper */

	// login as "root", when no errors on password screen
	$user_helper->loginUser('root', $this->Application->GetVar('root_password'));

	// import base language for core (english)
	$this->toolkit->ImportLanguage('/core/install/english');

	// make sure imported language is set as active in session, created during installation
	$this->Application->Session->SetField('Language', 1);

	// set imported language as primary
	$lang =& $this->Application->recallObject('lang.-item', null, Array('skip_autoload' => true));
	/* @var $lang LanguagesItem */

	$lang->Load(1); // fresh install => ID=1
	$lang->setPrimary(true); // for Front-End
	break;

	case 'choose_modules':
	// run module install scripts
	$modules = $this->Application->GetVar('modules');
	if ($modules) {
	foreach ($modules as $module) {
	$install_file = MODULES_PATH.'/'.$module.'/install.php';
	if (file_exists($install_file)) {
	include_once($install_file);
	}
	}
	}

	// update category cache
	$updater =& $this->Application->makeClass('kPermCacheUpdater');
	/* @var $updater kPermCacheUpdater */

	$updater->OneStepRun();
	break;

	case 'post_config':
	$this->toolkit->saveConfigValues( $this->GetVar('config') );
	break;

	case 'select_theme':
	// 1. mark theme, that user is selected
	$theme_id = $this->GetVar('theme');
	$theme_table = $this->Application->getUnitOption('theme', 'TableName');
	$theme_idfield = $this->Application->getUnitOption('theme', 'IDField');

	$sql = 'UPDATE ' . $theme_table . '
	SET Enabled = 1, PrimaryTheme = 1
	WHERE ' . $theme_idfield . ' = ' . $theme_id;
	$this->Conn->Query($sql);

	$this->toolkit->rebuildThemes(); // rescan theme to create structure after theme is enabled !!!

	// install theme dependent demo data
	if ($this->Application->GetVar('install_demo_data')) {
	$sql = 'SELECT Name
	FROM ' . $theme_table . '
	WHERE ' . $theme_idfield . ' = ' . $theme_id;
	$theme_name = $this->Conn->GetOne($sql);
	$site_path = $this->Application->ConfigValue('Site_Path');

	$file_helper =& $this->Application->recallObject('FileHelper');
	/* @var $file_helper FileHelper */

	foreach ($this->Application->ModuleInfo as $module_name => $module_info) {
	if ($module_name == 'In-Portal') {
	continue;
	}

	$template_path = '/themes' . '/' . $theme_name . '/' . $module_info['TemplatePath'];
	$this->toolkit->RunSQL( $template_path . '_install/install_data.sql', Array('{ThemeId}', '{SitePath}'), Array($theme_id, $site_path) );

	// copy theme demo images into writable path accessible by FCKEditor
	$file_helper->copyFolderRecursive(FULL_PATH . $template_path . '_install/images' . DIRECTORY_SEPARATOR, WRITEABLE . '/user_files/Images');
	}
	}
	break;

	case 'upgrade_modules':
	// get installed modules from db and compare their versions to upgrade script
	$modules = $this->Application->GetVar('modules');

	if ($modules) {
	$upgrade_data = $this->GetUpgradableModules();
	$start_from_query = $this->Application->GetVar('start_from_query');
	$this->upgradeDepencies = $this->getUpgradeDependencies($modules, $upgrade_data);

	if ($start_from_query !== false) {
	$this->upgradeLog = unserialize( $this->Application->RecallVar('UpgradeLog') );
	}
	else {
	$start_from_query = 0;
	$this->upgradeLog = Array ('ModuleVersions' => Array ());

	// remember each module version, before upgrade scripts are executed
	foreach ($modules as $module_name) {
	$module_info = $upgrade_data[$module_name];
	$this->upgradeLog['ModuleVersions'][$module_name] = $module_info['FromVersion'];
	}

	$this->Application->RemoveVar('UpgradeLog');
	}

	// 1. perform "php before", "sql", "php after" upgrades
	foreach ($modules as $module_name) {
	$module_info = $upgrade_data[$module_name];

	/*echo '<h2>Upgrading "' . $module_info['Name'] . '" to "' . $module_info['ToVersion'] . '"</h2>' . "\n";
	flush();*/

	if (!$this->RunUpgrade($module_info['Name'], $module_info['ToVersion'], $upgrade_data, $start_from_query)) {
	$this->Application->StoreVar('UpgradeLog', serialize($this->upgradeLog));
	$this->Done();
	}

	// restore upgradable module version (makes sense after sql error processing)
	$upgrade_data[$module_name]['FromVersion'] = $this->upgradeLog['ModuleVersions'][$module_name];
	}

	// 2. import language pack, perform "languagepack" upgrade for all upgraded versions
	foreach ($modules as $module_name) {
	$module_info = $upgrade_data[$module_name];
	$sqls =& $this->getUpgradeQueriesFromVersion($module_info['Path'], $module_info['FromVersion']);
	preg_match_all('/' . VERSION_MARK . '/s', $sqls, $regs);

	// import module language pack
	$this->toolkit->ImportLanguage('/' . $module_info['Path'] . 'install/english', true);

	// perform advanced language pack upgrade
	foreach ($regs[1] as $version) {
	$this->RunUpgradeScript($module_info['Path'], $version, 'languagepack');
	}
	}

	// 3. upgrade admin skin
	if (in_array('core', $modules)) {
	$skin_upgrade_log = $this->toolkit->upgradeSkin($upgrade_data['core']);

	if ($skin_upgrade_log === true) {
	$this->Application->RemoveVar('SkinUpgradeLog');
	}
	else {
	$this->Application->StoreVar('SkinUpgradeLog', serialize($skin_upgrade_log));
	}

	// for now we set "In-Portal" module version to "Core" module version (during upgrade)
	$this->toolkit->SetModuleVersion('In-Portal', false, $upgrade_data['core']['ToVersion']);
	}
	}
	break;

	case 'fix_paths':
	$this->toolkit->saveConfigValues( $this->Application->GetVar('config') );
	break;

	case 'finish':
	// delete cache
	$this->toolkit->deleteCache();
	$this->toolkit->rebuildThemes();

	// compile admin skin, so it will be available in 3 frames at once
	$skin_helper =& $this->Application->recallObject('SkinHelper');
	/* @var $skin_helper SkinHelper */

	$skin =& $this->Application->recallObject('skin', null, Array ('skip_autoload' => true));
	/* @var $skin kDBItem */

	$skin->Load(1, 'IsPrimary');
	$skin_helper->compile($skin);

	// set installation finished mark
	if ($this->Application->ConfigValue('InstallFinished') === false) {
	$fields_hash = Array (
	'VariableName' => 'InstallFinished',
	'VariableValue' => 1,
	);
	$this->Conn->doInsert($fields_hash, TABLE_PREFIX.'ConfigurationValues');
	}
	break;
	}

	if ($this->errorMessage) {
	// was error during run stage
	return ;
	}

	$this->currentStep = $this->GetNextStep();
	$this->InitStep(); // init next step (that will be shown now)

	$this->InitApplication();

	if ($this->currentStep == -1) {
	// step after last step -> redirect to admin
	$this->Application->Redirect('index', Array (), '', 'index.php');
	}
	}

	function getUpgradeDependencies($modules, &$upgrade_data)
	{
	$dependencies = Array ();

	foreach ($modules as $module_name) {
	$module_info = $upgrade_data[$module_name];
	$upgrade_object =& $this->getUpgradeObject($module_info['Path']);

	if (!is_object($upgrade_object)) {
	continue;
	}

	foreach ($upgrade_object->dependencies as $dependent_version => $version_dependencies) {
	if (!$version_dependencies) {
	// module is independent -> skip
	continue;
	}

	list ($parent_name, $parent_version) = each($version_dependencies);

	if (!array_key_exists($parent_name, $dependencies)) {
	// parent module
	$dependencies[$parent_name] = Array ();
	}

	if (!array_key_exists($parent_version, $dependencies[$parent_name])) {
	// parent module versions, that are required by other module versions
	$dependencies[$parent_name][$parent_version] = Array ();
	}

	$dependencies[$parent_name][$parent_version][] = Array ($module_info['Name'] => $dependent_version);
	}
	}

	return $dependencies;
	}

	/**
	* Returns database queries, that should be executed to perform upgrade from given to lastest version of given module path
	*
	* @param string $module_path
	* @param string $from_version
	* @return string
	*/
	function &getUpgradeQueriesFromVersion($module_path, $from_version)
	{
	$upgrades_file = sprintf(UPGRADES_FILE, $module_path, 'sql');

	$sqls = file_get_contents($upgrades_file);
	$version_mark = preg_replace('/($.*?$)/', $from_version, VERSION_MARK);

	// get only sqls from next (relative to current) version to end of file
	$start_pos = strpos($sqls, $version_mark);
	$sqls = substr($sqls, $start_pos);

	return $sqls;
	}

	function RunUpgrade($module_name, $to_version, &$upgrade_data, &$start_from_query)
	{
	$module_info = $upgrade_data[ strtolower($module_name) ];

	$sqls =& $this->getUpgradeQueriesFromVersion($module_info['Path'], $module_info['FromVersion']);
	preg_match_all('/(' . VERSION_MARK . ')/s', $sqls, $matches, PREG_SET_ORDER + PREG_OFFSET_CAPTURE);

	foreach ($matches as $index => $match) {
	// upgrade version
	$version = $match[2][0];

	if ($this->toolkit->ConvertModuleVersion($version) > $this->toolkit->ConvertModuleVersion($to_version)) {
	// only upgrade to $to_version, not further
	break;
	}

	if (!in_array($module_name . ':' . $version, $this->upgradeLog)) {
	if ($this->Application->isDebugMode()) {
	$this->Application->Debugger->appendHTML('Upgrading "' . $module_name . '" to "' . $version . '" version: BEGIN.');
	}

	/*echo 'Upgrading "' . $module_name . '" to "' . $version . '".<br/>' . "\n";
	flush();*/

	// don't upgrade same version twice
	$start_pos = $match[0][1] + strlen($match[0][0]);
	$end_pos = array_key_exists($index + 1, $matches) ? $matches[$index + 1][0][1] : strlen($sqls);
	$version_sqls = substr($sqls, $start_pos, $end_pos - $start_pos);

	if ($start_from_query == 0) {
	$this->RunUpgradeScript($module_info['Path'], $version, 'before');
	}

	if (!$this->toolkit->RunSQLText($version_sqls, null, null, $start_from_query)) {
	$this->errorMessage .= '<input type="hidden" name="start_from_query" value="' . $this->LastQueryNum . '">';
	$this->errorMessage .= '<br/>Module "' . $module_name . '" upgrade to "' . $version . '" failed.';
	$this->errorMessage .= '<br/>Click Continue button below to skip this query and go further<br/>';

	return false;
	}
	else {
	// reset query counter, when all queries were processed
	$start_from_query = 0;
	}

	$this->RunUpgradeScript($module_info['Path'], $version, 'after');

	if ($this->Application->isDebugMode()) {
	$this->Application->Debugger->appendHTML('Upgrading "' . $module_name . '" to "' . $version . '" version: END.');
	}

	// remember, that we've already upgraded given version
	$this->upgradeLog[] = $module_name . ':' . $version;
	}

	if (array_key_exists($module_name, $this->upgradeDepencies) && array_key_exists($version, $this->upgradeDepencies[$module_name])) {
	foreach ($this->upgradeDepencies[$module_name][$version] as $dependency_info) {
	list ($dependent_module, $dependent_version) = each($dependency_info);

	if (!$this->RunUpgrade($dependent_module, $dependent_version, $upgrade_data, $start_from_query)) {
	return false;
	}
	}
	}

	// only mark module as updated, when all it's dependent modules are upgraded
	$this->toolkit->SetModuleVersion($module_name, false, $version);
	}

	return true;
	}

	/**
	* Run upgrade PHP scripts for module with specified path
	*
	* @param string $module_path
	* @param Array $version
	* @param string $mode upgrade mode = {before,after,languagepack}
	*/
	function RunUpgradeScript($module_path, $version, $mode)
	{
	$upgrade_object =& $this->getUpgradeObject($module_path);

	if (!is_object($upgrade_object)) {
	return ;
	}

	$upgrade_method = 'Upgrade_' . str_replace(Array ('.', '-'), '_', $version);

	if (method_exists($upgrade_object, $upgrade_method)) {
	$upgrade_object->$upgrade_method($mode);
	}
	}

	/**
	* Returns upgrade class for given module path
	*
	* @param string $module_path
	* @return kUpgradeHelper
	*/
	function &getUpgradeObject($module_path)
	{
	static $upgrade_classes = Array ();
	$upgrades_file = sprintf(UPGRADES_FILE, $module_path, 'php');

	if (!file_exists($upgrades_file)) {
	$false = false;
	return $false;
	}

	if (!isset($upgrade_classes[$module_path])) {
	require_once(FULL_PATH . REL_PATH . '/install/upgrade_helper.php');

	// save class name, because 2nd time (in after call)
	// $upgrade_class variable will not be present
	include_once $upgrades_file;
	$upgrade_classes[$module_path] = $upgrade_class;
	}

	$upgrade_object = new $upgrade_classes[$module_path]();
	/* @var $upgrade_object CoreUpgrades */

	$upgrade_object->setToolkit($this->toolkit);

	return $upgrade_object;
	}

	/**
	* Initialize kApplication
	*
	* @param bool $force initialize in any case
	*/
	function InitApplication($force = false)
	{
	if (($force \|\| !in_array($this->currentStep, $this->skipApplicationSteps)) && !isset($this->Application)) {
	// step is allowed for application usage & it was not initialized in previous step
	global $start, $debugger, $dbg_options;
	include_once(FULL_PATH.'/core/kernel/startup.php');

	$this->Application =& kApplication::Instance();
	$this->toolkit->Application =& kApplication::Instance();

	$this->includeModuleConstants();
	$this->Application->Init();

	$this->Conn =& $this->Application->GetADODBConnection();
	$this->toolkit->Conn =& $this->Application->GetADODBConnection();
	}
	}

	/**
	* When no modules installed, then pre-include all modules contants, since they are used in unit configs
	*
	*/
	function includeModuleConstants()
	{
	$modules = $this->ScanModules();

	foreach ($modules as $module_path) {
	$contants_file = MODULES_PATH . '/' . $module_path . '/constants.php';

	if ( file_exists($contants_file) ) {
	kUtil::includeOnce($contants_file);
	}
	}
	}

	/**
	* Show next step screen
	*
	*/
	function Done($error_message = null)
	{
	if (isset($error_message)) {
	$this->errorMessage = $error_message;
	}

	include_once (FULL_PATH.'/'.REL_PATH.'/install/incs/install.tpl');

	if (isset($this->Application)) {
	$this->Application->Done();
	}

	exit;
	}

	function ConnectToDatabase()
	{
	include_once FULL_PATH . '/core/kernel/db/db_connection.php';

	$required_keys = Array ('DBType', 'DBUser', 'DBName');
	foreach ($required_keys as $required_key) {
	if (!$this->toolkit->getSystemConfig('Database', $required_key)) {
	// one of required db connection settings missing -> abort connection
	return false;
	}
	}

	$this->Conn = new kDBConnection($this->toolkit->getSystemConfig('Database', 'DBType'), Array(&$this, 'DBErrorHandler'));
	$this->Conn->setup( $this->toolkit->systemConfig );

	// setup toolkit too
	$this->toolkit->Conn =& $this->Conn;

	return !$this->Conn->hasError();
	}

	/**
	* Checks if core is already installed
	*
	* @return bool
	*/
	function AlreadyInstalled()
	{
	$table_prefix = $this->toolkit->getSystemConfig('Database', 'TablePrefix');

	$sql = 'SELECT VariableValue
	FROM ' . $table_prefix . 'ConfigurationValues
	WHERE VariableName = "InstallFinished"';

	return $this->TableExists('ConfigurationValues') && $this->Conn->GetOne($sql);
	}

	function CheckDatabase($check_installed = true)
	{
	// perform various check type to database specified
	// 1. user is allowed to connect to database
	// 2. user has all types of permissions in database


	if (mb_strlen($this->toolkit->getSystemConfig('Database', 'TablePrefix')) > 7) {
	$this->errorMessage = 'Table prefix should not be longer than 7 characters';
	return false;
	}

	// connect to database
	$status = $this->ConnectToDatabase();
	if ($status) {
	// if connected, then check if all sql statements work
	$sql_tests[] = 'DROP TABLE IF EXISTS test_table';
	$sql_tests[] = 'CREATE TABLE test_table(test_col mediumint(6))';
	$sql_tests[] = 'LOCK TABLES test_table WRITE';
	$sql_tests[] = 'INSERT INTO test_table(test_col) VALUES (5)';
	$sql_tests[] = 'UPDATE test_table SET test_col = 12';
	$sql_tests[] = 'UNLOCK TABLES';
	$sql_tests[] = 'ALTER TABLE test_table ADD COLUMN new_col varchar(10)';
	$sql_tests[] = 'SELECT * FROM test_table';
	$sql_tests[] = 'DELETE FROM test_table';
	$sql_tests[] = 'DROP TABLE IF EXISTS test_table';

	foreach ($sql_tests as $sql_test) {
	$this->Conn->Query($sql_test);
	if ($this->Conn->getErrorCode() != 0) {
	$status = false;
	break;
	}
	}

	if ($status) {
	// if statements work & connection made, then check table existance
	if ($check_installed && $this->AlreadyInstalled()) {
	$this->errorMessage = 'An In-Portal Database already exists at this location';
	return false;
	}
	}
	else {
	// user has insufficient permissions in database specified
	$this->errorMessage = 'Permission Error: ('.$this->Conn->getErrorCode().') '.$this->Conn->getErrorMsg();
	return false;
	}
	}
	else {
	// was error while connecting
	if (!$this->Conn) return false;
	$this->errorMessage = 'Connection Error: ('.$this->Conn->getErrorCode().') '.$this->Conn->getErrorMsg();
	return false;
	}

	return true;
	}

	/**
	* Checks if all passed tables exists
	*
	* @param string $tables comma separated tables list
	* @return bool
	*/
	function TableExists($tables)
	{
	$prefix = $this->toolkit->getSystemConfig('Database', 'TablePrefix');

	$all_found = true;
	$tables = explode(',', $tables);
	foreach ($tables as $table_name) {
	$sql = 'SHOW TABLES LIKE "'.$prefix.$table_name.'"';
	if (count($this->Conn->Query($sql)) == 0) {
	$all_found = false;
	break;
	}
	}

	return $all_found;
	}

	/**
	* Returns modules list found in modules folder
	*
	* @return Array
	*/
	function ScanModules()
	{
	static $modules = null;

	if (!isset($modules)) {
	$modules = Array();
	$fh = opendir(MODULES_PATH);
	while ( ($sub_folder = readdir($fh)) ) {
	$folder_path = MODULES_PATH . '/'.$sub_folder;
	if ($sub_folder != '.' && $sub_folder != '..' && is_dir($folder_path)) {
	// this is folder in MODULES_PATH directory
	if (file_exists($folder_path.'/install.php') && file_exists($folder_path.'/install/install_schema.sql')) {
	$install_order = trim( file_get_contents($folder_path . '/install/install_order.txt') );
	$modules[$install_order] = $sub_folder;
	}
	}
	}
	}

	// allows to control module install order
	ksort($modules, SORT_NUMERIC);
	return $modules;
	}

	/**
	* Virtually place module under "modules" folder or it won't be recognized during upgrade to 5.1.0 version
	*
	* @param string $name
	* @param string $path
	* @param string $version
	* @return string
	*/
	function getModulePath($name, $path, $version)
	{
	if ($name == 'Core') {
	// don't transform path for Core module
	return $path;
	}

	if (!preg_match('/^modules\//', $path)) {
	// upgrade from 5.0.x/1.0.x to 5.1.x/1.1.x
	return 'modules/' . $path;
	}

	return $path;
	}

	/**
	* Returns list of modules, that can be upgraded
	*
	*/
	function GetUpgradableModules()
	{
	$ret = Array ();

	foreach ($this->Application->ModuleInfo as $module_name => $module_info) {
	if ($module_name == 'In-Portal') {
	// don't show In-Portal, because it shares upgrade scripts with Core module
	continue;
	}

	$module_info['Path'] = $this->getModulePath($module_name, $module_info['Path'], $module_info['Version']);
	$upgrades_file = sprintf(UPGRADES_FILE, $module_info['Path'], 'sql');

	if (!file_exists($upgrades_file)) {
	// no upgrade file
	continue;
	}

	$sqls = file_get_contents($upgrades_file);
	$versions_found = preg_match_all('/'.VERSION_MARK.'/s', $sqls, $regs);
	if (!$versions_found) {
	// upgrades file doesn't contain version definitions
	continue;
	}

	$to_version = end($regs[1]);
	$this_version = $this->toolkit->ConvertModuleVersion($module_info['Version']);
	if ($this->toolkit->ConvertModuleVersion($to_version) > $this_version) {
	// destination version is greather then current
	foreach ($regs[1] as $version) {
	if ($this->toolkit->ConvertModuleVersion($version) > $this_version) {
	$from_version = $version;
	break;
	}
	}

	$version_info = Array (
	'FromVersion' => $from_version,
	'ToVersion' => $to_version,
	);

	$ret[ strtolower($module_name) ] = array_merge($module_info, $version_info);
	}
	}

	return $ret;
	}

	/**
	* Returns content to show for current step
	*
	* @return string
	*/
	function GetStepBody()
	{
	$step_template = FULL_PATH.'/core/install/step_templates/'.$this->currentStep.'.tpl';
	if (file_exists($step_template)) {
	ob_start();
	include_once ($step_template);
	return ob_get_clean();
	}

	return '{step template "'.$this->currentStep.'" missing}';
	}

	/**
	* Parses step information file, cache result for current step ONLY & return it
	*
	* @return Array
	*/
	function &_getStepInfo()
	{
	static $info = Array('help_title' => null, 'step_title' => null, 'help_body' => null, 'queried' => false);

	if (!$info['queried']) {
	$fdata = file_get_contents($this->StepDBFile);

	$parser = xml_parser_create();
	xml_parse_into_struct($parser, $fdata, $values, $index);
	xml_parser_free($parser);

	foreach ($index['STEP'] as $section_index) {
	$step_data =& $values[$section_index];

	if ($step_data['attributes']['NAME'] == $this->currentStep) {
	$info['step_title'] = $step_data['attributes']['TITLE'];
	if (isset($step_data['attributes']['HELP_TITLE'])) {
	$info['help_title'] = $step_data['attributes']['HELP_TITLE'];
	}
	else {
	// if help title not set, then use step title
	$info['help_title'] = $step_data['attributes']['TITLE'];
	}
	$info['help_body'] = trim($step_data['value']);
	break;
	}
	}

	$info['queried'] = true;
	}

	return $info;
	}

	/**
	* Returns particular information abou current step
	*
	* @param string $info_type
	* @return string
	*/
	function GetStepInfo($info_type)
	{
	$step_info =& $this->_getStepInfo();

	if (isset($step_info[$info_type])) {
	return $step_info[$info_type];
	}

	return '{step "'.$this->currentStep.'"; param "'.$info_type.'" missing}';
	}

	/**
	* Returns passed steps titles
	*
	* @param Array $steps
	* @return Array
	* @see kInstaller:PrintSteps
	*/
	function _getStepTitles($steps)
	{
	$fdata = file_get_contents($this->StepDBFile);

	$parser = xml_parser_create();
	xml_parse_into_struct($parser, $fdata, $values, $index);
	xml_parser_free($parser);

	$ret = Array ();
	foreach ($index['STEP'] as $section_index) {
	$step_data =& $values[$section_index];
	if (in_array($step_data['attributes']['NAME'], $steps)) {
	$ret[ $step_data['attributes']['NAME'] ] = $step_data['attributes']['TITLE'];
	}
	}

	return $ret;
	}

	/**
	* Returns current step number in active steps_preset.
	* Value can't be cached, because same step can have different number in different presets
	*
	* @return int
	*/
	function GetStepNumber()
	{
	return array_search($this->currentStep, $this->steps[$this->stepsPreset]) + 1;
	}

	/**
	* Returns step name to process next
	*
	* @return string
	*/
	function GetNextStep()
	{
	$next_index = $this->GetStepNumber();
	if ($next_index > count($this->steps[$this->stepsPreset]) - 1) {
	return -1;
	}

	return $this->steps[$this->stepsPreset][$next_index];
	}

	/**
	* Returns step name, that was processed before this step
	*
	* @return string
	*/
	function GetPreviousStep()
	{
	$next_index = $this->GetStepNumber() - 1;
	if ($next_index < 0) {
	$next_index = 0;
	}

	return $this->steps[$this->stepsPreset][$next_index];
	}

	/**
	* Prints all steps from active steps preset and highlights current step
	*
	* @param string $active_tpl
	* @param string $passive_tpl
	* @return string
	*/
	function PrintSteps($active_tpl, $passive_tpl)
	{
	$ret = '';
	$step_titles = $this->_getStepTitles($this->steps[$this->stepsPreset]);

	foreach ($this->steps[$this->stepsPreset] as $step_name) {
	$template = $step_name == $this->currentStep ? $active_tpl : $passive_tpl;
	$ret .= sprintf($template, $step_titles[$step_name]);
	}

	return $ret;
	}

	/**
	* Installation error handler for sql errors
	*
	* @param int $code
	* @param string $msg
	* @param string $sql
	* @return bool
	* @access private
	*/
	function DBErrorHandler($code, $msg, $sql)
	{
	$this->errorMessage = 'Query: <br />'.htmlspecialchars($sql).'<br />execution result is error:<br />['.$code.'] '.$msg;
	return true;
	}

	/**
	* Installation error handler
	*
	* @param int $errno
	* @param string $errstr
	* @param string $errfile
	* @param int $errline
	* @param Array $errcontext
	*/
	function ErrorHandler($errno, $errstr, $errfile = '', $errline = '', $errcontext = '')
	{
	if ($errno == E_USER_ERROR) {
	// only react on user fatal errors
	$this->Done($errstr);
	}
	}

	/**
	* Checks, that given button should be visible on current installation step
	*
	* @param string $name
	* @return bool
	*/
	function buttonVisible($name)
	{
	$button_visibility = Array (
	'continue' => $this->GetNextStep() != -1 \|\| ($this->stepsPreset == 'already_installed'),
	'refresh' => in_array($this->currentStep, Array ('check_paths', 'security')),
	'back' => in_array($this->currentStep, Array (/'select_license',/ 'download_license', 'select_domain')),
	);

	if ($name == 'any') {
	foreach ($button_visibility as $button_name => $button_visible) {
	if ($button_visible) {
	return true;
	}
	}

	return false;
	}

	return array_key_exists($name, $button_visibility) ? $button_visibility[$name] : true;
	}
	}

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