/lenasys/trunk

<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');

/**

 * CodeIgniter

 *

 * An open source application development framework for PHP 5.1.6 or newer

 *

 * @package		CodeIgniter

 * @author		ExpressionEngine Dev Team

 * @copyright	Copyright (c) 2008 - 2011, EllisLab, Inc.

 * @license		http://codeigniter.com/user_guide/license.html

 * @link		http://codeigniter.com

 * @since		Version 1.0

 * @filesource

 */

// ------------------------------------------------------------------------

/**

 * CodeIgniter Config Class

 *

 * This class contains functions that enable config files to be managed

 *

 * @package		CodeIgniter

 * @subpackage	Libraries

 * @category	Libraries

 * @author		ExpressionEngine Dev Team

 * @link		http://codeigniter.com/user_guide/libraries/config.html

 */

class CI_Config {

	/**

	 * List of all loaded config values

	 *

	 * @var array

	 */

	var $config = array();

	/**

	 * List of all loaded config files

	 *

	 * @var array

	 */

	var $is_loaded = array();

	/**

	 * List of paths to search when trying to load a config file

	 *

	 * @var array

	 */

	var $_config_paths = array(APPPATH);

	/**

	 * Constructor

	 *

	 * Sets the $config data from the primary config.php file as a class variable

	 *

	 * @access   public

	 * @param   string	the config file name

	 * @param   boolean  if configuration values should be loaded into their own section

	 * @param   boolean  true if errors should just return false, false if an error message should be displayed

	 * @return  boolean  if the file was successfully loaded or not

	 */

	function __construct()

	{

		$this->config =& get_config();

		log_message('debug', "Config Class Initialized");

		// Set the base_url automatically if none was provided

		if ($this->config['base_url'] == '')

		{

			if (isset($_SERVER['HTTP_HOST']))

			{

				$base_url = isset($_SERVER['HTTPS']) && strtolower($_SERVER['HTTPS']) !== 'off' ? 'https' : 'http';

				$base_url .= '://'. $_SERVER['HTTP_HOST'];

				$base_url .= str_replace(basename($_SERVER['SCRIPT_NAME']), '', $_SERVER['SCRIPT_NAME']);

			}

			else

			{

				$base_url = 'http://localhost/';

			}

			$this->set_item('base_url', $base_url);

		}

	}

	// --------------------------------------------------------------------

	/**

	 * Load Config File

	 *

	 * @access	public

	 * @param	string	the config file name

	 * @param   boolean  if configuration values should be loaded into their own section

	 * @param   boolean  true if errors should just return false, false if an error message should be displayed

	 * @return	boolean	if the file was loaded correctly

	 */

	function load($file = '', $use_sections = FALSE, $fail_gracefully = FALSE)

	{

		$file = ($file == '') ? 'config' : str_replace('.php', '', $file);

		$found = FALSE;

		$loaded = FALSE;

		$check_locations = defined('ENVIRONMENT')

			? array(ENVIRONMENT.'/'.$file, $file)

			: array($file);

		foreach ($this->_config_paths as $path)

		{

			foreach ($check_locations as $location)

			{

				$file_path = $path.'config/'.$location.'.php';

				if (in_array($file_path, $this->is_loaded, TRUE))

				{

					$loaded = TRUE;

					continue 2;

				}

				if (file_exists($file_path))

				{

					$found = TRUE;

					break;

				}

			}

			if ($found === FALSE)

			{

				continue;

			}

			include($file_path);

			if ( ! isset($config) OR ! is_array($config))

			{

				if ($fail_gracefully === TRUE)

				{

					return FALSE;

				}

				show_error('Your '.$file_path.' file does not appear to contain a valid configuration array.');

			}

			if ($use_sections === TRUE)

			{

				if (isset($this->config[$file]))

				{

					$this->config[$file] = array_merge($this->config[$file], $config);

				}

				else

				{

					$this->config[$file] = $config;

				}

			}

			else

			{

				$this->config = array_merge($this->config, $config);

			}

			$this->is_loaded[] = $file_path;

			unset($config);

			$loaded = TRUE;

			log_message('debug', 'Config file loaded: '.$file_path);

			break;

		}

		if ($loaded === FALSE)

		{

			if ($fail_gracefully === TRUE)

			{

				return FALSE;

			}

			show_error('The configuration file '.$file.'.php does not exist.');

		}

		return TRUE;

	}

	// --------------------------------------------------------------------

	/**

	 * Fetch a config file item

	 *

	 *

	 * @access	public

	 * @param	string	the config item name

	 * @param	string	the index name

	 * @param	bool

	 * @return	string

	 */

	function item($item, $index = '')

	{

		if ($index == '')

		{

			if ( ! isset($this->config[$item]))

			{

				return FALSE;

			}

			$pref = $this->config[$item];

		}

		else

		{

			if ( ! isset($this->config[$index]))

			{

				return FALSE;

			}

			if ( ! isset($this->config[$index][$item]))

			{

				return FALSE;

			}

			$pref = $this->config[$index][$item];

		}

		return $pref;

	}

	// --------------------------------------------------------------------

	/**

	 * Fetch a config file item - adds slash after item (if item is not empty)

	 *

	 * @access	public

	 * @param	string	the config item name

	 * @param	bool

	 * @return	string

	 */

	function slash_item($item)

	{

		if ( ! isset($this->config[$item]))

		{

			return FALSE;

		}

		if( trim($this->config[$item]) == '')

		{

			return '';

		}

		return rtrim($this->config[$item], '/').'/';

	}

	// --------------------------------------------------------------------

	/**

	 * Site URL

	 * Returns base_url . index_page [. uri_string]

	 *

	 * @access	public

	 * @param	string	the URI string

	 * @return	string

	 */

	function site_url($uri = '')

	{

		if ($uri == '')

		{

			return $this->slash_item('base_url').$this->item('index_page');

		}

		if ($this->item('enable_query_strings') == FALSE)

		{

			$suffix = ($this->item('url_suffix') == FALSE) ? '' : $this->item('url_suffix');

			return $this->slash_item('base_url').$this->slash_item('index_page').$this->_uri_string($uri).$suffix;

		}

		else

		{

			return $this->slash_item('base_url').$this->item('index_page').'?'.$this->_uri_string($uri);

		}

	}

	// -------------------------------------------------------------

	/**

	 * Base URL

	 * Returns base_url [. uri_string]

	 *

	 * @access public

	 * @param string $uri

	 * @return string

	 */

	function base_url($uri = '')

	{

		return $this->slash_item('base_url').ltrim($this->_uri_string($uri), '/');

	}

	// -------------------------------------------------------------

	/**

	 * Build URI string for use in Config::site_url() and Config::base_url()

	 *

	 * @access protected

	 * @param  $uri

	 * @return string

	 */

	protected function _uri_string($uri)

	{

		if ($this->item('enable_query_strings') == FALSE)

		{

			if (is_array($uri))

			{

				$uri = implode('/', $uri);

			}

			$uri = trim($uri, '/');

		}

		else

		{

			if (is_array($uri))

			{

				$i = 0;

				$str = '';

				foreach ($uri as $key => $val)

				{

					$prefix = ($i == 0) ? '' : '&';

					$str .= $prefix.$key.'='.$val;

					$i++;

				}

				$uri = $str;

			}

		}

	    return $uri;

	}

	// --------------------------------------------------------------------

	/**

	 * System URL

	 *

	 * @access	public

	 * @return	string

	 */

	function system_url()

	{

		$x = explode("/", preg_replace("|/*(.+?)/*$|", "\\1", BASEPATH));

		return $this->slash_item('base_url').end($x).'/';

	}

	// --------------------------------------------------------------------

	/**

	 * Set a config file item

	 *

	 * @access	public

	 * @param	string	the config item key

	 * @param	string	the config item value

	 * @return	void

	 */

	function set_item($item, $value)

	{

		$this->config[$item] = $value;

	}

	// --------------------------------------------------------------------

	/**

	 * Assign to Config

	 *

	 * This function is called by the front controller (CodeIgniter.php)

	 * after the Config class is instantiated.  It permits config items

	 * to be assigned or overriden by variables contained in the index.php file

	 *

	 * @access	private

	 * @param	array

	 * @return	void

	 */

	function _assign_to_config($items = array())

	{

		if (is_array($items))

		{

			foreach ($items as $key => $val)

			{

				$this->set_item($key, $val);

			}

		}

	}

}

// END CI_Config class

/* End of file Config.php */

/* Location: ./system/core/Config.php */