<?php
define('CONFIG_PATHS', 'path');
define('CONFIG_URLS', 'url');
define('CONFIG_DATABASE', 'db');
define('CONFIG_LOGGING', 'log');

class Config {
	private static $instance = null;
	private $storage;

	function __construct () {
		$this->storage = array();
	}

	public static function GetInstance () {
		if (self::$instance === null) {
			$className = __CLASS__;
			self::$instance = new $className();
		}
		return(self::$instance);
	}

	function setVal ($sNameSpace, $sKey, $sVal) {
		if (is_null($sKey))
			$this->storage[$sNameSpace][] = $sVal;
		else
			$this->storage[$sNameSpace][$sKey] = $sVal;
	}

	function getVal ($sNameSpace, $sKey) {
		if (!array_key_exists($sNameSpace, $this->storage)) return '';
		if (!array_key_exists($sKey, $this->storage[$sNameSpace])) return '';
		return $this->storage[$sNameSpace][$sKey];
	}

	function getVals ($sNameSpace) {
		if (!array_key_exists($sNameSpace, $this->storage)) return array();
		return array_keys($this->storage[$sNameSpace]);
	}

	function hasVal ($sNameSpace, $sKey) {
		return array_key_exists($sKey, $this->storage[$sNameSpace]);
	}

	function delVal ($sNameSpace, $sKey) {
		unset($this->storage[$sNameSpace][$sKey]);
	}
}
?>