egroupware/setup/inc/functions.inc.php

<?php
/**
 * Setup
 *
 * @link http://www.egroupware.org
 * @package setup
 * @author Joseph Engo <jengo@phpgroupware.org>
 * @author Dan Kuykendall <seek3r@phpgroupware.org>
 * @author Mark Peters <skeeter@phpgroupware.org>
 * @author Miles Lott <milos@groupwhere.org>
 * @author Ralf Becker <RalfBecker-AT-outdoor-training.de>
 * @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
 * @version $Id$
 */

	error_reporting(error_reporting() & ~E_NOTICE);
	
	// for an old header, we need to setup the reference before including it
	$GLOBALS['phpgw_info'] =& $GLOBALS['egw_info'];

	if(file_exists('../header.inc.php'))
	{
		include('../header.inc.php');
	}
	// for an old header we need to setup a reference for the domains
	if (!is_array($GLOBALS['egw_domain'])) $GLOBALS['egw_domain'] =& $GLOBALS['phpgw_domain'];

	if (!function_exists('version_compare'))//version_compare() is only available in PHP4.1+
	{
		echo 'eGroupWare now requires PHP 4.1 or greater.<br>';
		echo 'Please contact your System Administrator';
		exit;
	}

	/*  If we included the header.inc.php, but it is somehow broken, cover ourselves... */
	if(!defined('EGW_SERVER_ROOT') && !defined('EGW_INCLUDE_ROOT'))
	{
		if (defined('PHPGW_SERVER_ROOT') && defined('PHPGW_INCLUDE_ROOT'))	// pre 1.2 install
		{
			define('EGW_SERVER_ROOT',PHPGW_SERVER_ROOT);
			define('EGW_INCLUDE_ROOT',PHPGW_INCLUDE_ROOT);
		}
		else	// no install
		{
			define('EGW_SERVER_ROOT','..');
			define('EGW_INCLUDE_ROOT','..');
			define('PHPGW_SERVER_ROOT','..');
			define('PHPGW_INCLUDE_ROOT','..');
		}
		define('EGW_API_INC',EGW_SERVER_ROOT.'/phpgwapi/inc');
	}

	require(EGW_INCLUDE_ROOT . '/phpgwapi/inc/common_functions.inc.php');

	define('SEP',filesystem_separator());

	/**
	 * Checks if a directory exists, is writable by the webserver and optionaly is in the docroot
	 *
	 * @param string $dir path
	 * @param string &$msg error-msg: 'does not exist', 'is not writeable by the webserver' or 'is in the webservers docroot' (run through lang)
	 * @param boolean $check_in_docroot=false run an optional in docroot check
	 * @return boolean
	 */
	function check_dir($dir,&$msg,$check_in_docroot=false)
	{
		if (!@is_dir($dir) && !(@is_writeable(dirname($dir)) && @mkdir($dir,0700,true)))
		{
			$msg = lang('does not exist');
			return false;
		}
		if (!@is_writeable($dir) && $_SERVER['HTTP_HOST'])	// only do the check if we run by the webserver
		{
			$msg = lang('is not writeable by the webserver');
			return false;
		}
		if ($check_in_docroot)
		{
			$docroots = array(EGW_SERVER_ROOT,$_SERVER['DOCUMENT_ROOT']);
			$dir = realpath($dir);
	
			foreach ($docroots as $docroot)
			{
				$len = strlen($docroot);
	
				if ($docroot == substr($dir,0,$len))
				{
					$rest = substr($dir,$len);
	
					if (!strlen($rest) || $rest[0] == DIRECTORY_SEPARATOR)
					{
						$msg = lang('is in the webservers docroot');
						return false;
					}
				}
			}
		}
		return true;
	}

	/**
	 * function to handle multilanguage support
	 *
	 */
	function lang($key,$vars=null)
	{
		if(!is_array($vars))
		{
			$vars = func_get_args();
			array_shift($vars);	// remove $key
		}
		return $GLOBALS['egw_setup']->translation->translate("$key", $vars);
	}

	/**
	 * returns array of languages we support, with enabled set to True if the lang file exists
	 */
	function get_langs()
	{
		$f = fopen('./lang/languages','rb');
		while($line = fgets($f,200))
		{
			list($x,$y) = split("\t",$line);
			$languages[$x]['lang']  = trim($x);
			$languages[$x]['descr'] = trim($y);
			$languages[$x]['available'] = False;
		}
		fclose($f);

		$d = dir('./lang');
		while($file=$d->read())
		{
			if(preg_match('/^phpgw_([-a-z]+).lang$/i',$file,$matches))
			{
				$languages[$matches[1]]['available'] = True;
			}
		}
		$d->close();

		//print_r($languages);
		return $languages;
	}

	function lang_select($onChange=False,$ConfigLang='')
	{
		if (!$ConfigLang)
		{
			$ConfigLang = get_var('ConfigLang',Array('POST','COOKIE'));
		}
		$select = '<select name="ConfigLang"'.($onChange ? ' onchange="this.form.submit();"' : '').'>' . "\n";
		$languages = get_langs();
		usort($languages,create_function('$a,$b','return strcmp(@$a[\'descr\'],@$b[\'descr\']);'));
		foreach($languages as $data)
		{
			if($data['available'] && !empty($data['lang']))
			{
				$selected = '';
				$short = substr($data['lang'],0,2);
				if ($short == $ConfigLang || empty($ConfigLang) && $short == substr($_SERVER['HTTP_ACCEPT_LANGUAGE'],0,2))
				{
					$selected = ' selected="selected"';
				}
				$select .= '<option value="' . $data['lang'] . '"' . $selected . '>' . $data['descr'] . '</option>' . "\n";
			}
		}
		$select .= '</select>' . "\n";

		return $select;
	}

	if(file_exists(EGW_SERVER_ROOT.'/phpgwapi/setup/setup.inc.php'))
	{
		include(EGW_SERVER_ROOT.'/phpgwapi/setup/setup.inc.php'); /* To set the current core version */
		/* This will change to just use setup_info */
		$GLOBALS['egw_info']['server']['versions']['current_header'] = $setup_info['phpgwapi']['versions']['current_header'];
	}
	else
	{
		$GLOBALS['egw_info']['server']['versions']['phpgwapi'] = 'Undetected';
	}

	$GLOBALS['egw_info']['server']['app_images'] = 'templates/default/images';

	CreateObject('setup.setup',True,True);	// setup constuctor assigns itself to $GLOBALS['egw_setup'], doing it twice fails on some php4
	$GLOBALS['phpgw_setup'] =& $GLOBALS['egw_setup'];