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egroupware_official/phpgwapi/inc/class.egw.inc.php

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<?php
/**
* eGroupWare API - Applications
*
* @link http://www.egroupware.org
* This file was originaly written by Dan Kuykendall and Joseph Engo
* Copyright (C) 2000, 2001 Dan Kuykendall
* Parts Copyright (C) 2003 Free Software Foundation
* @author RalfBecker@outdoor-training.de
* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
* @package api
* @version $Id$
*/
/**
* New written class to create the eGW enviroment AND restore it from a php-session
*
* Rewritten by RalfBecker@outdoor-training.de to store the eGW enviroment
* (egw-object and egw_info-array) in a php-session and restore it from
* there instead of creating it completly new on each page-request.
* The enviroment gets now created by the egw-class
*
* Use now a php5 getter method to create the usuall subobject on demand, to allow a quicker
* header include on sites not useing php4-restore.
* This also makes a lot of application code, like the following, unnecessary:
* if (!is_object($GLOBALS['egw']->datetime)
* {
* $GLOBALS['egw']->datetime = CreateObject('phpgwapi.datetime');
* }
* You can now simply use $GLOBALS['egw']->datetime, and the egw class instanciates it for you on demand.
*/
class egw extends egw_minimal
{
/**
* Turn on debug mode. Will output additional data for debugging purposes.
* @var string
* @access public
*/
var $debug = 0; // This will turn on debugging information.
/**
* Instance of the account object
*
* @var accounts
*/
var $accounts;
/**
* Instace of the common object
*
* @var common
*/
var $common;
/**
* Instace of the hooks object
*
* @var hooks
*/
var $hooks;
private $cat_cache;
/**
* Constructor: Instantiates the sub-classes
*
* @author RalfBecker@outdoor-training.de
* @param array $domain_names array with valid egw-domain names
*/
function __construct($domain_names=null)
{
$GLOBALS['egw'] =& $this; // we need to be immediately available there for the other classes we instantiate
// for the migration: reference us to the old phpgw object
$GLOBALS['phpgw'] =& $this;
$this->setup($domain_names,True);
}
/**
* Called every time the constructor is called. Also called by sessions to ensure the correct db,
* in which case we do not recreate the session object.
* @author RalfBecker@outdoor-training.de (moved to setup() by milos@groupwhere.org
* @param array $domain_names array with valid egw-domain names
* @param boolean $createsessionobject True to create the session object (default=True)
*/
function setup($domain_names,$createsessionobject=True)
{
// create the DB-object
$this->db = new egw_db($GLOBALS['egw_info']['server']);
if ($this->debug)
{
$this->db->Debug = 1;
}
$this->db->set_app('phpgwapi');
// check if eGW is already setup, if not redirect to setup/
try {
$this->db->connect();
if (!($num_config = $this->db->select(config::TABLE,'COUNT(config_name)',false,__LINE__,__FILE__)->fetchColumn()))
{
$phpgw_config = $this->db->select('phpgw_config','COUNT(config_name)',false,__LINE__,__FILE__)->fetchColumn();
}
}
catch(Exception $e) {
//echo "<pre>Connection to DB failed (".$e->getMessage().")!\n".$e->getTraceAsString();
}
if ($e || !$num_config)
{
$setup_dir = str_replace(array('home/index.php','index.php'),'setup/',$_SERVER['PHP_SELF']);
// we check for the old table too, to not scare updating users ;-)
if ($phpgw_config)
{
throw new Exception('<center><b>Fatal Error:</b> You need to <a href="' . $setup_dir .
'">update eGroupWare</a> before you can continue using it.</center>',999);
}
else
{
throw new Exception('<center><b>Fatal Error:</b> It appears that you have not created the database tables for '
.'eGroupWare. Click <a href="' . $setup_dir . '">here</a> to run setup.</center>',999);
}
exit;
}
// Set the DB's client charset if a system-charset is set
$system_charset = $this->db->select(config::TABLE,'config_value',array(
'config_app' => 'phpgwapi',
'config_name' => 'system_charset',
),__LINE__,__FILE__)->fetchColumn();
if ($system_charset)
{
$this->db->Link_ID->SetCharSet($system_charset);
}
// load up the $GLOBALS['egw_info']['server'] array
foreach($this->db->select(config::TABLE,'*',array('config_app' => 'phpgwapi'),__LINE__,__FILE__) as $row)
{
$GLOBALS['egw_info']['server'][$row['config_name']] = $row['config_value'];
}
//$GLOBALS['egw_info']['server'] = config::read('phpgwapi'); would unserialize arrays
// if no server timezone set, use date_default_timezone_get() to determine it once
// it fills to log with deprecated warnings under 5.3 otherwise
if (empty($GLOBALS['egw_info']['server']['server_timezone']) ||
$GLOBALS['egw_info']['server']['server_timezone'] == 'System/Localtime') // treat invalid tz like empty!
{
try
{
$tz = new DateTimeZone(date_default_timezone_get());
config::save_value('server_timezone',$GLOBALS['egw_info']['server']['server_timezone'] = $tz->getName(),'phpgwapi');
error_log(__METHOD__."() stored server_timezone=".$GLOBALS['egw_info']['server']['server_timezone']);
}
catch(Exception $e)
{
// do nothing if new DateTimeZone fails (eg. 'System/Localtime' returned), specially do NOT store it!
error_log(__METHOD__."() NO valid 'date.timezone' set in your php.ini!");
}
}
date_default_timezone_set($GLOBALS['egw_info']['server']['server_timezone']);
// setup the other subclasses
// translation class is here only for backward compatibility, as all it's methods can be called static now
$this->translation = new translation();
$this->common = new common();
$this->accounts = accounts::getInstance();
$this->acl = new acl();
// we instanciate the hooks object here manually, to cache it's hooks in the session
$this->hooks = new hooks();
/* Do not create the session object if called by the sessions class. This way
* we ensure the correct db based on the user domain.
*/
if($createsessionobject)
{
$this->session = new egw_session($domain_names);
}
$this->preferences = new preferences();
$this->applications = new applications();
register_shutdown_function(array($this, 'shutdown'));
if ($GLOBALS['egw_info']['flags']['currentapp'] != 'login' && $GLOBALS['egw_info']['flags']['currentapp'] != 'logout')
{
$this->verify_session();
$this->applications->read_installed_apps(); // to get translated app-titles, has to be after verify_session
$this->define_egw_constants();
$this->check_app_rights();
$this->load_optional_classes();
$this->cat_cache =& categories::init_cache();
}
else // set the defines for login, in case it's more then just login
{
$this->define_egw_constants();
}
}
/**
* __wakeup function gets called by php while unserializing the egw-object, eg. reconnects to the DB
*
* @author RalfBecker@outdoor-training.de
*/
function __wakeup()
{
$GLOBALS['egw'] =& $this; // we need to be immediately available there for the other classes we instantiate
// for the migration: reference us to the old phpgw object
$GLOBALS['phpgw'] =& $this;
if ($GLOBALS['egw_info']['server']['system_charset'])
{
$this->db->Link_ID->SetCharSet($GLOBALS['egw_info']['server']['system_charset']);
}
// restoring server timezone, to avoid warnings under php5.3
if (!empty($GLOBALS['egw_info']['server']['server_timezone']))
{
date_default_timezone_set($GLOBALS['egw_info']['server']['server_timezone']);
}
register_shutdown_function(array($this, 'shutdown'));
$this->define_egw_constants();
categories::init_cache($this->cat_cache);
}
/**
* wakeup2 funcontion needs to be called after unserializing the egw-object
*
* It adapts the restored object/enviroment to the changed (current) application / page-request
*
* @author RalfBecker@outdoor-training.de
*/
function wakeup2()
{
// do some application specific stuff, need to be done as we are different (current) app now
if (isset($this->template))
{
$this->template->set_root(EGW_APP_TPL);
}
// init the translation class, necessary as own wakeup would run before our's
translation::init();
$this->unset_datetime();
// verify the session
$GLOBALS['egw']->verify_session();
$GLOBALS['egw']->check_app_rights();
$this->load_optional_classes();
}
/**
* Unsetting datetime object, so time gets updated
*/
function unset_datetime()
{
unset($this->datetime);
}
/**
* load optional classes by mentioning them in egw_info[flags][enable_CLASS_class] => true
*
* Also loads the template-class if not egw_info[flags][disable_Template_class] is set
*
* Maybe the whole thing should be depricated ;-)
*/
function load_optional_classes()
{
// output the header unless the developer turned it off
if (!@$GLOBALS['egw_info']['flags']['noheader'])
{
$GLOBALS['egw']->common->egw_header();
}
// Load the (depricated) app include files if they exists
if (EGW_APP_INC != "" && ! preg_match ('/phpgwapi/i', EGW_APP_INC) &&
file_exists(EGW_APP_INC . '/functions.inc.php') && !isset($_GET['menuaction']))
{
include(EGW_APP_INC . '/functions.inc.php');
}
if (!@$GLOBALS['egw_info']['flags']['noheader'] && !@$GLOBALS['egw_info']['flags']['noappheader'] &&
file_exists(EGW_APP_INC . '/header.inc.php') && !isset($_GET['menuaction']))
{
include(EGW_APP_INC . '/header.inc.php');
}
}
/**
* Verfiy there is a valid session
*
* One can specify a callback, which gets called if there's no valid session. If the callback returns true, the parameter
* containst account-details (in keys login, passwd and passwd_type) to automatic create an (anonymous session)
*
* It also checks if enforce_ssl is set in the DB and redirects to the https:// version of the site.
*
* If there is no valid session and none could be automatic created, the function will redirect to login and NOT return
*/
function verify_session()
{
if(isset($GLOBALS['egw_info']['server']['enforce_ssl']) && !$_SERVER['HTTPS'])
{
Header('Location: https://' . $GLOBALS['egw_info']['server']['hostname'] . $GLOBALS['egw_info']['server']['webserver_url'] . $_SERVER['REQUEST_URI']);
exit;
}
// check if we have a session, if not try to automatic create one
if ($this->session->verify()) return true;
if (($account_callback = $GLOBALS['egw_info']['flags']['autocreate_session_callback']) && is_callable($account_callback) &&
($sessionid = call_user_func_array($account_callback,array(&$account))) === true) // $account_call_back returns true, false or a session-id
{
$sessionid = $this->session->create($account);
}
if (!$sessionid)
{
//echo "<p>account_callback='$account_callback', account=".print_r($account,true).", sessionid=$sessionid</p>\n"; exit;
// we forward to the same place after the re-login
if ($GLOBALS['egw_info']['server']['webserver_url'] && $GLOBALS['egw_info']['server']['webserver_url'] != '/')
{
list(,$relpath) = explode($GLOBALS['egw_info']['server']['webserver_url'],$_SERVER['PHP_SELF'],2);
}
else // the webserver-url is empty or just a slash '/' (eGW is installed in the docroot and no domain given)
{
if (preg_match('/^https?:\/\/[^\/]*\/(.*)$/',$relpath=$_SERVER['PHP_SELF'],$matches))
{
$relpath = $matches[1];
}
}
// this removes the sessiondata if its saved in the URL
$query = preg_replace('/[&]?sessionid(=|%3D)[^&]+&kp3(=|%3D)[^&]+&domain=.*$/','',$_SERVER['QUERY_STRING']);
if ($GLOBALS['egw_info']['server']['http_auth_types'])
{
$redirect = '/phpgwapi/ntlm/index.php?';
}
else
{
$redirect = '/login.php?';
// only add "your session could not be verified", if a sessionid is given (cookie or on url)
if (egw_session::get_sessionid()) $redirect .= 'cd=10&';
}
if ($relpath) $redirect .= 'phpgw_forward='.urlencode($relpath.(!empty($query) ? '?'.$query : ''));
Header('Location: '.$GLOBALS['egw_info']['server']['webserver_url'].$redirect);
exit;
}
}
/**
* Verify the user has rights for the requested app
*
* If the user has no rights for the app (eg. called via URL) he get a permission denied page (this function does NOT return)
*/
function check_app_rights()
{
$this->currentapp = $GLOBALS['egw_info']['flags']['currentapp']; // some apps change it later
if ($GLOBALS['egw_info']['flags']['currentapp'] != 'about')
{
// This will need to use ACL in the future
if (!$GLOBALS['egw_info']['user']['apps'][$currentapp = $GLOBALS['egw_info']['flags']['currentapp']] ||
($GLOBALS['egw_info']['flags']['admin_only'] && !$GLOBALS['egw_info']['user']['apps']['admin']))
{
if ($currentapp == 'admin' || $GLOBALS['egw_info']['flags']['admin_only'])
{
throw new egw_exception_no_permission_admin();
}
throw new egw_exception_no_permission_app($currentapp);
}
}
}
/**
* create all the defines / constants of the eGW-environment (plus the deprecated phpgw ones)
*/
function define_egw_constants()
{
define('SEP',filesystem_separator());
define('EGW_ACL_READ',1);
define('EGW_ACL_ADD',2);
define('EGW_ACL_EDIT',4);
define('EGW_ACL_DELETE',8);
define('EGW_ACL_PRIVATE',16);
define('EGW_ACL_GROUP_MANAGERS',32);
define('EGW_ACL_CUSTOM_1',64);
define('EGW_ACL_CUSTOM_2',128);
define('EGW_ACL_CUSTOM_3',256);
// and the old ones
define('PHPGW_ACL_READ',1);
define('PHPGW_ACL_ADD',2);
define('PHPGW_ACL_EDIT',4);
define('PHPGW_ACL_DELETE',8);
define('PHPGW_ACL_PRIVATE',16);
define('PHPGW_ACL_GROUP_MANAGERS',32);
define('PHPGW_ACL_CUSTOM_1',64);
define('PHPGW_ACL_CUSTOM_2',128);
define('PHPGW_ACL_CUSTOM_3',256);
// A few hacker resistant constants that will be used throught the program
define('EGW_TEMPLATE_DIR', $this->common->get_tpl_dir('phpgwapi'));
define('EGW_IMAGES_DIR', $this->common->get_image_path('phpgwapi'));
define('EGW_IMAGES_FILEDIR', $this->common->get_image_dir('phpgwapi'));
define('EGW_APP_ROOT', $this->common->get_app_dir());
define('EGW_APP_INC', $this->common->get_inc_dir());
define('EGW_APP_TPL', $this->common->get_tpl_dir());
define('EGW_IMAGES', $this->common->get_image_path());
define('EGW_APP_IMAGES_DIR', $this->common->get_image_dir());
// and the old ones
define('PHPGW_TEMPLATE_DIR',EGW_TEMPLATE_DIR);
define('PHPGW_IMAGES_DIR',EGW_IMAGES_DIR);
define('PHPGW_IMAGES_FILEDIR',EGW_IMAGES_FILEDIR);
define('PHPGW_APP_ROOT',EGW_APP_ROOT);
define('PHPGW_APP_INC',EGW_APP_INC);
define('PHPGW_APP_TPL',EGW_APP_TPL);
define('PHPGW_IMAGES',EGW_IMAGES);
define('PHPGW_APP_IMAGES_DIR',EGW_APP_IMAGES_DIR);
}
/**
* force the session cache to be re-created, because some of it's data changed
*
* Needs to be called if user-preferences, system-config or enabled apps of the current user have been changed and
* the change should have immediate effect
*/
static function invalidate_session_cache()
{
unset($_SESSION['egw_info_cache']);
unset($_SESSION['egw_object_cache']);
}
/**
* run string through htmlspecialchars and stripslashes
*
* @param string $s
* @return string The string with html special characters replaced with entities
*/
static function strip_html($s)
{
return htmlspecialchars(stripslashes($s));
}
/**
* Link url generator
*
* @param string $string The url the link is for
* @param string/array $extravars Extra params to be passed to the url
* @return string The full url after processing
*/
static function link($url = '', $extravars = '')
{
return $GLOBALS['egw']->framework->link($url, $extravars);
}
/**
* Redirects direct to a generated link
*
* @param string $string The url the link is for
* @param string/array $extravars Extra params to be passed to the url
* @return string The full url after processing
*/
static function redirect_link($url = '',$extravars='')
{
return $GLOBALS['egw']->framework->redirect_link($url, $extravars);
}
/**
* Handles redirects under iis and apache, it does NOT return (calls exit)
*
* This function handles redirects under iis and apache it assumes that $phpgw->link() has already been called
*
* @param string The url ro redirect to
*/
static function redirect($url = '')
{
/* global $HTTP_ENV_VARS; */
$iis = @strpos($GLOBALS['HTTP_ENV_VARS']['SERVER_SOFTWARE'], 'IIS', 0);
if(!$url)
{
$url = $_SERVER['PHP_SELF'];
}
if($iis)
{
echo "\n<HTML>\n<HEAD>\n<TITLE>Redirecting to $url</TITLE>";
echo "\n<META HTTP-EQUIV=REFRESH CONTENT=\"0; URL=$url\">";
echo "\n</HEAD><BODY>";
echo "<H3>Please continue to <a href=\"$url\">this page</a></H3>";
echo "\n</BODY></HTML>";
}
else
{
if (headers_sent($file,$line))
{
throw new egw_exception_assertion_failed(__METHOD__."('".htmlspecialchars($url)."') can NOT redirect, output already started at $file line $line!");
}
Header("Location: $url");
print("\n\n");
}
@ob_flush(); flush();
// commit session (if existing), to fix timing problems sometimes preventing session creation ("Your session can not be verified")
if (isset($GLOBALS['egw']->session)) $GLOBALS['egw']->session->commit_session();
exit;
}
/**
* Shortcut to translation class
*
* This function is a basic wrapper to translation::translate()
*
* @deprecated only used in the old timetracker
* @param string The key for the phrase
* @see translation::translate()
*/
static function lang($key,$args=null)
{
if (!is_array($args))
{
$args = func_get_args();
array_shift($args);
}
return translation::translate($key,$args);
}
/**
* eGW's shutdown handler
*/
function shutdown()
{
if (!defined('EGW_SHUTDOWN'))
{
define('EGW_SHUTDOWN',True);
if (class_exists('egw_link',false)) // false = no autoload!
{
egw_link::save_session_cache();
}
// call the asyncservice check_run function if it is not explicitly set to cron-only
//
if (!$GLOBALS['egw_info']['server']['asyncservice']) // is default
{
ExecMethod('phpgwapi.asyncservice.check_run','fallback');
}
$this->db->disconnect();
}
}
}
/**
* Minimal eGW object used in setup, does not instanciate anything by default
*
*/
class egw_minimal
{
/**
* Instance of the db-object
*
* @var egw_db
*/
var $db;
/**
* Current app at the instancation of the class
*
* @var string
*/
var $currentapp;
/**
* Global ADOdb object, need to be defined here, to not call magic __get method
*
* @var ADOConnection
*/
var $ADOdb;
/**
* Classes which get instanciated in a different name
*
* @var array
*/
static $sub_objects = array(
'log' => 'errorlog',
'js' => 'javascript',
'link' => 'bolink', // depricated use static egw_link methods
'datetime' => 'egw_datetime',
// 'session' => 'sessions',
'session' => 'egw_session',
'framework' => true, // special handling in __get()
'template' => 'Template',
);
/**
* Magic function to check if a sub-object is set
*
* @param string $name
* @return boolean
*/
function __isset($name)
{
//error_log(__METHOD__."($name)");
return isset($this->$name);
}
/**
* Magic function to return a sub-object
*
* @param string $name
* @return mixed
*/
function __get($name)
{
//error_log(__METHOD__."($name)".function_backtrace());
if (isset($this->$name))
{
return $this->$name;
}
if (!isset(self::$sub_objects[$name]) && !class_exists($name))
{
if ($name != 'ADOdb') error_log(__METHOD__.": There's NO $name object! ".function_backtrace());
return null;
}
switch($name)
{
case 'framework':
// setup the new eGW framework (template sets)
$class = $GLOBALS['egw_info']['server']['template_set'].'_framework';
require_once($file=EGW_INCLUDE_ROOT.'/phpgwapi/templates/'.$GLOBALS['egw_info']['server']['template_set'].'/class.'.$class.'.inc.php');
if (!in_array($file,(array)$_SESSION['egw_required_files']))
{
$_SESSION['egw_required_files'][] = $file; // automatic load the used framework class, when the object get's restored
}
break;
case 'template': // need to be instancated for the current app
if (!($tpl_dir = $GLOBALS['egw']->common->get_tpl_dir($this->currentapp)))
{
return null;
}
return $this->template = new Template($tpl_dir);
default:
$class = isset(self::$sub_objects[$name]) ? self::$sub_objects[$name] : $name;
break;
}
return $this->$name = new $class();
}
}
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