/exchange/code/trunk/administrator/components/com_exchange/helper.php

<?php
/**
 * @version		$Id: helper.php 280 2010-09-18 02:14:15Z eddieajau $
 * @package		NewLifeInIT
 * @subpackage	com_exchange
 * @copyright	Copyright 2005 - 2010 New Life in IT Pty Ltd. All rights reserved.
 * @license		GNU General Public License version 2 or later.
 * @link		http://www.theartofjoomla.com
 */

// no direct access
defined('_JEXEC') or die;

/**
 * @package		NewLifeInIT
 * @subpackage	com_exchange
 * @since		1.0
 */
class ExchangeLog extends JObject
{
	/**
	 * The internal counter for the number of log messages
	 * @var	int
	 */
	private $count;
	/**
	 * An array of messages
	 * @var	array
	 */
	private $logs;

	/**
	 * Constructor
	 */
	function __construct()
	{
		$this->logs		= array();
		$this->count	= 0;
	}

	/**
	 * Singleton method
	 *
	 * @return	ExchangeLog
	 */
	function &getInstance()
	{
		static $instance = null;

		if ($instance == null) {
			$instance	= new ExchangeLog;
		}
		return $instance;
	}

	/**
	 * Adds a log message
	 *
	 * @param	int		A code
	 * @param	string	A message
	 * @param	boolean	True if you are appending to the last message added
	 */
	function add($code, $text, $append = false)
	{
		$log	= &ExchangeLog::getInstance();
		if ($append && $log->count > 0) {
			$i	= $log->count - 1;
			$log->logs[$i]['code']	= $code;
			$log->logs[$i]['text']	.= $text;
		}
		else
		{
			$log->logs[] = array('code' => (int) $code, 'text' => $text);
			$log->count++;
		}
	}

	/**
	 * Output the log as an HTML list
	 *
	 * @return	string
	 */
	function toHtml()
	{
		$log	= &ExchangeLog::getInstance();
		$result	= '<ol class="log">';
		foreach ($log->logs as $item)
		{
			$result .= '<li class="c'.$item['code'].'">'.nl2br($item['text']).'</li>';
		}
		$result	.= '</ol>';
		return $result;
	}
}

/**
 * @package		jXExchange
 */
class XMLHelper
{
	/**
	 * Checks if a string value is boolean true
	 *
	 * @param	mixed	A string or integer value
	 * @return	boolean	True is the value is a text or int representation of a boolean
	 */
	function isBool($value)
	{
		static $bools = array('yes', '1', 'true', 'y');
		$needle	= strtolower(trim($value));
		$result	= in_array($needle, $bools);
		return $result;
	}
}