egroupware_official/phpgwapi/inc/class.config.inc.php

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<?php
/**
* eGW's application configuration in a centralized location
*
* This allows eGroupWare to use php or database sessions
*
* @link www.egroupware.org
* @author Joseph Engo <jengo@phpgroupware.org> original class Copyright (C) 2000, 2001 Joseph Engo
* @author Ralf Becker <ralfbecker@outdoor-training.de>
* @version $Id$
*/
/**
* eGW's application configuration in a centralized location
*/
class config
{
/**
* Name of the config table
*
*/
const TABLE = 'egw_config';
/**
* Reference to the global db class
*
* @var egw_db
*/
static private $db;
/**
* Cache for the config data shared by all instances of this class
*
* @var array
*/
static private $configs = array();
/**
* app the particular config class is instanciated for
*
* @var string
*/
private $appname;
/**
* actual config-data of the instanciated class
*
* @deprecated dont use direct
* @var array
*/
public $config_data;
/**
* Constructor for the old non-static use
*
* @param string $appname
*/
function __construct($appname = '')
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{
if (!$appname)
{
$appname = $GLOBALS['egw_info']['flags']['currentapp'];
}
$this->appname = $appname;
}
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/**
* reads the whole repository for $this->appname, appname has to be set via the constructor
*
* You can also use the static config::read($app) method, without instanciating the class.
*
* @return array the whole config-array for that app
*/
function read_repository()
{
$this->config_data = self::read($this->appname);
//echo __CLASS__.'::'.__METHOD__."() this->appname=$this->appname\n"; _debug_array($this->config_data);
return $this->config_data;
}
/**
* updates the whole repository for $this->appname, you have to call read_repository() before (!)
*/
function save_repository()
{
if (!is_object(self::$db))
{
self::init_db();
}
if (is_array($this->config_data))
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{
self::$db->lock(array(config::TABLE));
foreach($this->config_data as $name => $value)
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{
$this->save_value($name,$value);
}
foreach(self::$configs[$this->appname] as $name => $value)
{
if (!isset($this->config_data[$name])) // has been deleted
{
self::$db->delete(config::TABLE,array('config_app'=>$this->appname,'config_name'=>$name),__LINE__,__FILE__);
}
}
self::$db->unlock();
if ($this->appname == 'phpgwapi' && method_exists($GLOBALS['egw'],'invalidate_session_cache')) // egw object in setup is limited
{
$GLOBALS['egw']->invalidate_session_cache(); // in case egw_info is cached in the session (phpgwapi is in egw_info[server])
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}
self::$configs[$this->appname] = $this->config_data;
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}
}
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/**
* updates or insert a single config-value direct into the database
*
* Can be used static, if $app given!
*
* @param string $name name of the config-value
* @param mixed $value content, empty or null values are not saved, but deleted
* @param string $app=null app-name, defaults to $this->appname set via the constructor
*/
/* static */ function save_value($name,$value,$app=null)
{
if (!$app && !isset($this))
{
throw new egw_exception_assertion_failed('$app parameter required for static call of config::save_value($name,$value,$app)!');
}
//echo "<p>config::save_value('$name','".print_r($value,True)."','$app')</p>\n";
if (!$app || isset($this) && $app == $this->appname)
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{
$app = $this->appname;
$this->config_data[$name] = $value;
}
//echo "<p>config::save_value('$name','".print_r($value,True)."','$app')</p>\n";
if (isset(self::$configs[$app][$name]) && self::$configs[$app][$name] === $value)
{
return True; // no change ==> exit
}
if (isset(self::$configs[$app]))
{
self::$configs[$app][$name] = $value;
}
if(is_array($value))
{
$value = serialize($value);
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}
if (!is_object(self::$db))
{
self::init_db();
}
if (!isset($value) || $value === '')
{
if (isset(self::$configs[$app])) unset(self::$configs[$app][$name]);
return self::$db->delete(config::TABLE,array('config_app'=>$app,'config_name'=>$name),__LINE__,__FILE__);
}
return self::$db->insert(config::TABLE,array('config_value'=>$value),array('config_app'=>$app,'config_name'=>$name),__LINE__,__FILE__);
}
/**
* deletes the whole repository for $this->appname, appname has to be set via the constructor
*
*/
function delete_repository()
{
if (!is_object(self::$db))
{
self::init_db();
}
self::$db->delete(config::TABLE,array('config_app' => $this->appname),__LINE__,__FILE__);
unset(self::$configs[$this->appname]);
}
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/**
* deletes a single value from the repository, you need to call save_repository after
*
* @param $variable_name string name of the config
*/
function delete_value($variable_name)
{
unset($this->config_data[$variable_name]);
}
/**
* sets a single value in the repositry, you need to call save_repository after
*
* @param $variable_name string name of the config
* @param $variable_data mixed the content
*/
function value($variable_name,$variable_data)
{
$this->config_data[$variable_name] = $variable_data;
}
/**
* Reads the configuration for an applications
*
* Does some caching to not read it twice (in the same request)
*
* @param string $app
* @return array
*/
static function read($app)
{
$config =& self::$configs[$app];
if (!isset($config))
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{
if (!is_object(self::$db))
{
self::init_db();
}
$config = array();
foreach(self::$db->select(config::TABLE,'*',array('config_app' => $app),__LINE__,__FILE__) as $row)
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{
$name = $row['config_name'];
$value = $row['config_value'];
$test = @unserialize($value);
$config[$name] = is_array($test) ? $test : $value;
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}
}
return $config;
}
/**
* get customfield array of an application
*
* @param string $app
* @param boolean $all_private_too=false should all the private fields be returned too, default no
* @return array with customfields
*/
static function get_customfields($app,$all_private_too=false)
{
$config = self::read($app);
$config_name = isset($config['customfields']) ? 'customfields' : 'custom_fields';
$cfs = is_array($config[$config_name]) ? $config[$config_name] : array();
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if (!$all_private_too)
{
foreach($cfs as $name => $field)
{
if ($field['private'] && !self::_check_private_cf($field['private']))
{
unset($cfs[$name]);
}
}
}
return $cfs;
}
/**
* Check if user is allowed to see a certain private cf
*
* @param string $private comma-separated list of user- or group-id's
* @return boolean true if user has access, false otherwise
*/
private static function _check_private_cf($private)
{
static $user_and_memberships;
if (!$private)
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{
return true;
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}
if (is_null($user_and_memberships))
{
$user_and_memberships = $GLOBALS['egw']->accounts->memberships($GLOBALS['egw_info']['user']['account_id'],true);
$user_and_memberships[] = $GLOBALS['egw_info']['user']['account_id'];
}
if (!is_array($private)) $private = explode(',',$private);
return (boolean) array_intersect($private,$user_and_memberships);
}
/**
* get_content_types of using application
*
* @param string $app
* @return array with content-types
*/
static function get_content_types($app)
{
$config = self::read($app);
return is_array($config['types']) ? $config['types'] : array();
}
/**
* Initialise our db
*
* We use a reference here (no clone), as we no longer use egw_db::row() or egw_db::next_record()!
*
*/
private static function init_db()
{
if (is_object($GLOBALS['egw']->db))
{
config::$db = $GLOBALS['egw']->db;
}
else
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{
config::$db = $GLOBALS['egw_setup']->db;
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}
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}
}