helper.php
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<?php
/**
* @package Joomla.Site
* @subpackage mod_random_image
*
* @copyright Copyright (C) 2005 - 2019 Open Source Matters, Inc. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE.txt
*/
defined('_JEXEC') or die;
use Joomla\String\StringHelper;
/**
* Helper for mod_random_image
*
* @since 1.5
*/
class ModRandomImageHelper
{
/**
* Retrieves a random image
*
* @param \Joomla\Registry\Registry &$params module parameters object
* @param array $images list of images
*
* @return mixed
*/
public static function getRandomImage(&$params, $images)
{
$width = $params->get('width', 100);
$height = $params->get('height', null);
$i = count($images);
$random = mt_rand(0, $i - 1);
$image = $images[$random];
$size = getimagesize(JPATH_BASE . '/' . $image->folder . '/' . $image->name);
if ($size[0] < $width)
{
$width = $size[0];
}
$coeff = $size[0] / $size[1];
if ($height === null)
{
$height = (int) ($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 $image;
}
/**
* Retrieves images from a specific folder
*
* @param \Joomla\Registry\Registry &$params module params
* @param string $folder folder to get the images from
*
* @return array
*/
public static function getImages(&$params, $folder)
{
$type = $params->get('type', 'jpg');
$files = array();
$images = array();
$dir = JPATH_BASE . '/' . $folder;
// Check if directory exists
if (is_dir($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 . '/' . $img) && preg_match('/' . $type . '/', $img))
{
$images[$i] = new stdClass;
$images[$i]->name = $img;
$images[$i]->folder = $folder;
$i++;
}
}
}
return $images;
}
/**
* Get sanitized folder
*
* @param \Joomla\Registry\Registry &$params module params objects
*
* @return mixed
*/
public static function getFolder(&$params)
{
$folder = $params->get('folder');
$LiveSite = JUri::base();
// If folder includes livesite info, remove
if (StringHelper::strpos($folder, $LiveSite) === 0)
{
$folder = str_replace($LiveSite, '', $folder);
}
// If folder includes absolute path, remove
if (StringHelper::strpos($folder, JPATH_SITE) === 0)
{
$folder = str_replace(JPATH_BASE, '', $folder);
}
return str_replace(array('\\', '/'), DIRECTORY_SEPARATOR, $folder);
}
}