<?php
/**
 * @package		HikaShop for Joomla!
 * @version		1.4.3
 * @author		hikashop.com
 * @copyright	(C) 2010 HIKARI SOFTWARE. All rights reserved.
 * @license		GNU/GPLv3 http://www.gnu.org/licenses/gpl-3.0.html
 */
defined('_JEXEC') or die('Restricted access');
?>
<?php
class hikashopWeightHelper{
	var $conversion = array(
		'g'=>array('kg'=>0.001,'lb'=>0.00220462234,'oz'=>0.035273962),
		'kg'=>array('g'=>1000,'lb'=>2.20462234,'oz'=>35.273962),
		'lb'=>array('kg'=>0.45359237,'g'=>453.59237,'oz'=>16),
		'oz'=>array('kg'=>28349.523125,'g'=>28.349523125,'lb'=>0.0625)
	);
	function hikashopWeightHelper(){
		$this->getSymbol();
	}	
	function convert($weight,$symbol_used='',$target=''){
		if(empty($target)){
			$target=$this->main_symbol;
		}
		if(empty($symbol_used)){
			$symbol_used=$this->main_symbol;
		}
		if($symbol_used != $target){
			$convert = $this->conversion[$symbol_used][$target];
			return $weight*$convert;
		}
		return $weight;
	}
	function getSymbol(){
		if(empty($this->main_symbol)){
			$config =& hikashop::config();
			$this->symbols = explode(',',$config->get('weight_symbols','kg,g'));
			foreach($this->symbols as $k => $symbol){
				$this->symbols[$k] = trim($symbol);
			}
			$this->main_symbol = array_shift($this->symbols);
		}
		return $this->main_symbol;
	}
}