<?php
/**
* @version		$Id: helper.php 14401 2010-01-26 14:10:00Z louis $
* @package		Joomla
* @copyright	Copyright (C) 2005 - 2010 Open Source Matters. All rights reserved.
* @license		GNU/GPL, see LICENSE.php
* Joomla! is free software. This version may have been modified pursuant
* to the GNU General Public License, and as distributed it includes or
* is derivative of works licensed under the GNU General Public License or
* other free or open source software licenses.
* See COPYRIGHT.php for copyright notices and details.
*/

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


class modRandomImageHelper
{
	function getRandomImage(&$params, $images)
	{
		$width 		= $params->get( 'width' );
		$height 	= $params->get( 'height' );

		$i 				= count($images);
		$random 		= mt_rand(0, $i - 1);
		$image 			= $images[$random];
		$size 			= getimagesize (JPATH_BASE.DS.$image->folder .DS. $image->name);


		if ($width == '') {
			$width = 100;
		}

		if ($size[0] < $width) {
			$width = $size[0];
		}

		$coeff = $size[0]/$size[1];
		if ($height == '') {
			$height = (int) ($width/$coeff);
		} else {
			$newheight = min ($height, (int) ($width/$coeff));
			if ($newheight < $height) {
				$height = $newheight;
			} else {
				$width = $height * $coeff;
			}
		}

		$image->width 	= $width;
		$image->height	= $height;
		$image->folder	= str_replace( '\\', '/', $image->folder );

		return $image;
	}

	function getImages(&$params, $folder)
	{
		$type 		= $params->get( 'type', 'jpg' );

		$files	= array();
		$images	= array();

		$dir = JPATH_BASE.DS.$folder;

		// check if directory exists
		if (is_dir($dir))
		{
			if ($handle = opendir($dir)) {
				while (false !== ($file = readdir($handle))) {
					if ($file != '.' && $file != '..' && $file != 'CVS' && $file != 'index.html' ) {
						$files[] = $file;
					}
				}
			}
			closedir($handle);

			$i = 0;
			foreach ($files as $img)
			{
				if (!is_dir($dir .DS. $img))
				{
					if (preg_match("#$type#i", $img)) {
						$images[$i]->name 	= $img;
						$images[$i]->folder	= $folder;
						++$i;
					}
				}
			}
		}

		return $images;
	}

	function getFolder(&$params)
	{
		$folder 	= $params->get( 'folder' );

		$LiveSite 	= JURI::base();

		// if folder includes livesite info, remove
		if ( JString::strpos($folder, $LiveSite) === 0 ) {
			$folder = str_replace( $LiveSite, '', $folder );
		}
		// if folder includes absolute path, remove
		if ( JString::strpos($folder, JPATH_SITE) === 0 ) {
			$folder= str_replace( JPATH_BASE, '', $folder );
		}
		$folder = str_replace('\\',DS,$folder);
		$folder = str_replace('/',DS,$folder);

		return $folder;
	}
}

