<?php defined('SYSPATH') or die('No direct access allowed.');

/**
 * This class is for access system configuration.
 *
 * @package    OSB
 * @subpackage Config
 * @category   Helpers
 * @author     Deon George
 * @copyright  (c) 2010 Open Source Billing
 * @license    http://dev.osbill.net/license.html
 */
class Config extends lnApp_Config {
	// Our setup object
	public $so;
	public static $no_site_id_tables = array('setup','country','currency','language','tax');

	/**
	 * @compat Restore KH 3.1 functionality
	 * @var  Kohana_Config  Singleton static instance
	 */
	protected static $_instance;

	public function __construct() {
		parent::__construct();

		// We need to know our site here, so that we can subsequently load our enabled modules.
		if (Kohana::$is_cli) {
			if (! $site = Minion_CLI::options('site'))
				// @todo Need to figure out how to make this CLI error nicer.
				throw new Minion_Exception_InvalidTask(_('Cant figure out the site, use --site= for CLI'));
			else
				$_SERVER['SERVER_NAME'] = $site;
		}
	}

	/**
	 * Get the singleton instance of Config.
	 *
	 *     $config = Config::instance();
	 *
	 * @return  Config
	 * @compat Restore KH 3.1 functionality
	 */
	public static function instance() {
		if (Config::$_instance === NULL)
			// Create a new instance
			Config::$_instance = new Config;

		return Config::$_instance;
	}

	/** Overloaded methods **/

	public static function date($date) {
		return date(Config::instance()->loadsite()->so->date_format,($date ? $date : time()));
	}

	/**
 	 * Show a date using a site configured format
	 * @note We need this function here, since we call static:: methods, which need to resolve to the child class.
 	 */
 	public static function datetime($date) {
 		return sprintf('%s %s',static::date($date),static::time($date));
 	}

	public static function siteid($format=FALSE) {
		return $format ? sprintf('%02s',Config::instance()->loadsite()->so->id) : Config::instance()->loadsite()->so->id;
	}

	public static function sitemode() {
		return Config::instance()->loadsite()->so->status;
	}

	public static function time($date) {
		return date(Config::instance()->loadsite()->so->time_format,($date ? $date : time()));
	}

	/** Local Methods **/

	/**
	 * Load our site configuration from the DB
	 *
	 * We cant do this in __construct(), since Kohana hasn't been fully initialised yet.
	 */
	public function loadsite() {
		// Anti-loop, if we have loaded our record, just return;
		if ($this->so AND $this->so->loaded())
			return $this;

		$this->so = ORM::factory('Setup',array('url'=>URL::base('http')));

		if (! $this->so->loaded())
			throw new Kohana_Exception(_('Site [:site] not defined in DB?'),array(':site'=>URL::base('http')));

		Kohana::$environment = (int)static::sitemode();

		return $this;
	}

	/**
	 * Find a list of all database enabled modules
	 *
	 * Our available modules are defined in the DB (along with method
	 * security).
	 */
	public static function modules() {
		static $return = array();

		if (! count($return))
			foreach (ORM::factory('Module')->list_external() as $mo)
				$return[$mo->name] = MODPATH.$mo->name;

		return $return;
	}

	public static function moduleexist($module) {
		return array_key_exists($module,static::modules()) ? TRUE : FALSE;
	}

	public static function copywrite() {
		return '(c) Open Source Billing Development Team';
	}
}
?>