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<?php defined('SYSPATH') or die('No direct script access.');
/**
* Loads configuration files and retrieves keys. This class is declared as final.
*
* $Id: Config.php 1694 2008-01-10 04:21:56Z zombor $
*
* @package Core
* @author Kohana Team
* @copyright (c) 2007 Kohana Team
* @license http://kohanaphp.com/license.html
*/
final class Config
{
/**
* Entire configuration
*
* @var array
*/
private static $cache;
/**
* Default variables
*
* @var array
*/
private static $default_variables = array
(
// default site lang is czech
'lang' => 'cs',
// default locale is czech
'language' => 'cs_CZ',
// allowed site loacles
'allowed_locales' => array
(
'cs' => 'cs_CZ',
'en' => 'en_US',
),
// allow to overide config properties
'allow_config_set' => TRUE,
// logging disabled by default
'log_threshold' => 0,
);
/**
* Include paths
*
* @var array
*/
private static $include_paths = array();

/**
* Get a config item or group.
*
* @param string $key
* @param boolean $slash
* @param boolean $required
* @return string
*/
public static function get($key, $slash = FALSE, $required = TRUE)
{
// config.php loading
if (self::$cache === NULL)
{
// Invalid config file
if (file_exists(DOCROOT . 'config' . EXT))
{
require(DOCROOT . 'config' . EXT);
}

if (!isset($config))
{
$config = array();
}

// Load config into self
self::$cache = $config;

self::include_paths(TRUE);
}

// load from chache
if (isset(self::$cache[$key]))
{
return self::$cache[$key];
}

// load from static variables
if (isset(self::$default_variables[$key]))
{
return self::$default_variables[$key];
}

// not founded
return '';
}

/**
* Sets a configuration item, if allowed.
*
* @param string config key string
* @param string config value
* @return boolean
*/
public static function set($key, $value)
{
// Config setting must be enabled
if (Config::get('allow_config_set') == FALSE)
{
Log::add('debug', 'Config::set was called, but your configuration file does not allow setting.');
return FALSE;
}

// Empty keys and allow_set cannot be set
if (empty($key) OR $key == 'allow_config_set')
return FALSE;

// Do this to make sure that the config array is already loaded
Config::get($key);

self::$cache[$key] = $value;

return TRUE;
}

/**
* Get all include paths.
*
* @param boolean re-process the include paths
* @return array include paths, APPPATH first
*/
public static function include_paths($process = FALSE)
{
if ($process == TRUE)
{
// Start setting include paths, APPPATH first
self::$include_paths = array(APPPATH);

// Finish setting include paths by adding SYSPATH
self::$include_paths[] = SYSPATH;
}

return self::$include_paths;
}

}

// End Config
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