chamilo-lms/main/document/document_slideshow.inc.php

<?php // $Id: document_slideshow.inc.php 21529 2009-06-20 14:01:55Z ivantcholakov $
/*
==============================================================================
	Dokeos - elearning and course management software

	Copyright (c) 2004-2008 Dokeos SPRL
	Copyright (c) 2003 Ghent University (UGent)
	Copyright (c) 2001 Universite catholique de Louvain (UCL)

	For a full list of contributors, see "credits.txt".
	The full license can be read in "license.txt".

	This program is free software; you can redistribute it and/or
	modify it under the terms of the GNU General Public License
	as published by the Free Software Foundation; either version 2
	of the License, or (at your option) any later version.

	See the GNU General Public License for more details.

	Contact: Dokeos, rue du Corbeau, 108, B-1030 Brussels, Belgium, info@dokeos.com
==============================================================================
*/
/**
*	This is a plugin for the documents tool. It looks for .jpg, .jpeg, .gif, .png
*	files (since these are the files that can be viewed in a browser) and creates
*	a slideshow with it by allowing to go to the next/previous image.
*	You can also have a quick overview (thumbnail view) of all the images in
*	that particular folder.
*
*	Each slideshow is folder based. Only
*	the images of the chosen folder are shown.
*
*	This file has two large sections.
*	1. code that belongs in document.php, but to avoid clutter I put the code here
*	(not present) 2. the function resize_image that handles the image resizing
*
*	@author Patrick Cool, responsible author
*	@author Roan Embrechts, minor cleanup
*	@package dokeos.document
==============================================================================
*/

/*
==============================================================================
	general code that belongs in document.php

	this code should indeed go in documents.php but since document.php is already a really ugly file with
	too much things in one file , I decided to put the code for document.php here and to include this
	file into document.php
==============================================================================
*/

$accepted_extensions = array('.jpg','.jpeg','.gif','.png');

// resetting the images of the slideshow = destroying the slideshow
if (isset($_GET['action']) && $_GET['action'] == 'exit_slideshow') {
	$_SESSION['image_files_only'] = null;
	unset($image_files_only);
}

// We check if there are images in this folder by searching the extensions for .jpg, .gif, .png
// grabbing the list of all the documents of this folder
//$all_files=$fileList['name'];
$array_to_search = (is_array($docs_and_folders)) ? $docs_and_folders : array();

if (count($array_to_search) > 0) {
	while(list ($key) = each ($array_to_search)) {
		$all_files[] = basename($array_to_search[$key]['path']);
		//echo basename($array_to_search[$key]['path']).'<br>';
	}
}


$image_present = 0;

if (count($all_files) > 0) {
	foreach ($all_files as $file) {
		$slideshow_extension = strrchr($file,'.');
		$slideshow_extension = strtolower($slideshow_extension);
		if (in_array($slideshow_extension,$accepted_extensions)) {
			$image_present = 1;
			$image_files_only[] = $file;
		}
	}
}

$tablename_column = (isset($_GET['tablename_column']) ? Security::remove_XSS($_GET['tablename_column']) : 0);
if ($tablename_column == 0) {
	$tablename_column = 1;
} else {
	$tablename_column = intval($tablename_column) - 1;
}
$tablename_direction = (isset($_GET['tablename_direction']) ? Security::remove_XSS($_GET['tablename_direction']) : 'ASC');

$image_files_only = sort_files($array_to_search);
$_SESSION['image_files_only'] = $image_files_only;

function sort_files($table) {

	global $tablename_direction, $accepted_extensions;
	$temp = array();

	foreach ($table as $file_array) {
		if ($file_array['filetype'] == 'file') {
			$slideshow_extension = strrchr($file_array['path'],'.');
            $slideshow_extension = strtolower($slideshow_extension);
			if (in_array($slideshow_extension,$accepted_extensions)) {
				$temp[] = array('file', basename($file_array['path']), $file_array['size'], $file_array['insert_date']);
			}
		}
	}

	if ($tablename_direction == 'DESC') {
		usort($temp, 'rsort_table');
	} else {
		usort($temp, 'sort_table');
	}

	$final_array = array();
	foreach ($temp as $file_array) {
		$final_array[] = $file_array[1];
	}

	return $final_array;
}

function sort_table($a, $b) {
	global $tablename_column;
	return strnatcmp($a[$tablename_column], $b[$tablename_column]);
}

function rsort_table($a, $b) {
	global $tablename_column;
	return strnatcmp($b[$tablename_column], $a[$tablename_column]);
}

?>