File Source for downloadfolder.inc.php

<?php // $Id: downloadfolder.inc.php 10195 2006-11-25 15:26:00Z pcool $
/**
==============================================================================
* Functions and main code for the download folder feature
*
* @package dokeos.document
==============================================================================
*/
$path = $_GET['path'];
//prevent some stuff
if(empty($path))
{
$path='/';
}
//check to see if they want to download an existing folder
if(($path!='/') && (!DocumentManager::get_document_id($_course,$path)))
{
$path='/';
}
//zip library for creation of the zipfile
include(api_get_path(LIBRARY_PATH).'pclzip/pclzip.lib.php');
//we need this path to clean it out of the zip file
//I'm not using dirname as it gives too much problems (cfr. \)
$remove_dir = ($path!='/') ? substr($path,0,strlen($path) - strlen(basename($path))) : '/';
//place to temporarily stash the zipfiles
$temp_zip_dir = $sys_course_path.$_course['path']."/temp";
//create the temp dir if it doesn't exist
//or do a cleanup befor creating the zipfile
if(!is_dir($temp_zip_dir))
{
mkdir($temp_zip_dir);
}
//cleanup: check the temp dir for old files and delete them
else
{
$handle=opendir($temp_zip_dir);
while (false!==($file = readdir($handle)))
{
if ($file != "." && $file != "..")
{
//the "age" of the file in hours
$Diff = (time() - filemtime("$temp_zip_dir/$file"))/60/60;
//delete files older than 4 hours
if ($Diff > 4) unlink("$temp_zip_dir/$file");
}
}
closedir($handle);
}
//create zipfile of given directory
$temp_zip_file = $temp_zip_dir."/".md5(time()).".zip";
$zip_folder=new PclZip($temp_zip_file);
$doc_table = Database::get_course_table(TABLE_DOCUMENT);
$prop_table = Database::get_course_table(TABLE_ITEM_PROPERTY);
//Put the files in the zip
//2 possibilities: admins get all files and folders in the selected folder (except for the deleted ones)
//normal users get only visible files that are in visible folders
//admins are allowed to download invisible files
if (is_allowed_to_edit())
{
//folder we want to zip --> no longer used, deleted files are included too like this
//$what_to_zip = $sys_course_path.$_course['path']."/document".$path;
//creation of the zipped folder
//$zip_folder->create($what_to_zip ,PCLZIP_OPT_REMOVE_PATH, $sys_course_path.$_course['path']."/document".$remove_dir );
//set the path that will be used in the query
if($path=='/')
{
$querypath=''; // to prevent ...path LIKE '//%'... in query
}
else
{
$querypath=$path;
}
//search for all files that are not deleted => visibility != 2
$query = api_sql_query("SELECT path FROM $doc_table AS docs,$prop_table AS props WHERE `props`.`tool`='".TOOL_DOCUMENT."' AND `docs`.`id`=`props`.`ref` AND `docs`.`path` LIKE '".$querypath."/%' AND `docs`.`filetype`='file' AND `props`.`visibility`<>'2' AND `props`.`to_group_id`=".$to_group_id."",__FILE__,__LINE__);
//add tem to the zip file
while($not_deleted_file = mysql_fetch_assoc($query))
{
$zip_folder->add($sys_course_path.$_course['path']."/document".$not_deleted_file['path'],PCLZIP_OPT_REMOVE_PATH, $sys_course_path.$_course['path']."/document".$remove_dir);
}
}
//for other users, we need to create a zipfile with only visible files and folders
else
{
if($path=='/')
{
$querypath=''; // to prevent ...path LIKE '//%'... in query
}
else
{
$querypath=$path;
}
//big problem: visible files that are in a hidden folder are included when we do a query for visiblity='v'!!!
//so... I do it in a couple of steps:
//1st: get all files that are visible in the given path
$query = api_sql_query("SELECT path FROM $doc_table AS docs,$prop_table AS props WHERE `props`.`tool`='".TOOL_DOCUMENT."' AND `docs`.`id`=`props`.`ref` AND `docs`.`path` LIKE '".$querypath."/%' AND `props`.`visibility`='1' AND `docs`.`filetype`='file' AND `props`.`to_group_id`=".$to_group_id,__FILE__,__LINE__);
//add them to an array
while($all_visible_files = mysql_fetch_assoc($query))
{
$all_visible_files_path[] = $all_visible_files['path'];
//echo "visible files: ".$sys_course_path.$_course['path']."/document".$all_visible_files['path']." ";
}
//echo('<pre>');
//print_r($all_visible_files_path);
//echo('</pre>');
//2nd: get all folders that are invisible in the given path
$query2 = api_sql_query("SELECT path FROM $doc_table AS docs,$prop_table AS props WHERE `props`.`tool`='".TOOL_DOCUMENT."' AND `docs`.`id`=`props`.`ref` AND `docs`.`path` LIKE '".$querypath."/%' AND `props`.`visibility`<>'1' AND `docs`.`filetype`='folder'",__FILE__,__LINE__);
//if we get invisible folders, we have to filter out these results from all visible files we found
if(mysql_num_rows($query2)>0)
{
//add tem to an array
while($invisible_folders = mysql_fetch_assoc($query2))
{
//3rd: get all files that are in the found invisible folder (these are "invisible" too)
//echo " invisible folders: ".$sys_course_path.$_course['path']."/document".$invisible_folders['path']." ";
$query3 = api_sql_query("SELECT path FROM $doc_table AS docs,$prop_table AS props WHERE `props`.`tool`='".TOOL_DOCUMENT."' AND `docs`.`id`=`props`.`ref` AND `docs`.`path` LIKE '".$invisible_folders['path']."/%' AND `docs`.`filetype`='file' AND `props`.`visibility`='1'",__FILE__,__LINE__);
//add tem to an array
while($files_in_invisible_folder = mysql_fetch_assoc($query3))
{
$files_in_invisible_folder_path[] = $files_in_invisible_folder['path'];
//echo " files in invisible folders: ".$sys_course_path.$_course['path']."/document".$files_in_invisible_folder['path']." id ".$files_in_invisible_folder['id']." ";
}
}
//compare the array with visible files and the array with files in invisible folders
//and keep the difference (= all visible files that are not in an invisible folder)
$files_for_zipfile = diff((array) $all_visible_files_path,(array) $files_in_invisible_folder_path);
}
//no invisible folders found, so all visible files can be added to the zipfile
else
{
$files_for_zipfile = $all_visible_files_path;
}
//add all files in our final array to the zipfile
//echo("path to remove from file ".$sys_course_path.$_course['path']."/document".$remove_dir.' ');
//echo('FILES FOR ZIP ');
//print_r($files_for_zipfile);
for($i=0;$i<count($files_for_zipfile);$i++)
{
$zip_folder->add($sys_course_path.$_course['path']."/document".$files_for_zipfile[$i],PCLZIP_OPT_REMOVE_PATH, $sys_course_path.$_course['path']."/document".$remove_dir);
//echo $sys_course_path.$_course['path']."/document".$files_for_zipfile[$i]." ";
}
}//end for other users
//exit;
//logging
// launch event
event_download(($path=='/')?'documents.zip (folder)':basename($path).'.zip (folder)');
//start download of created file
//send_file_to_client($temp_zip_file, basename(empty($_GET['id'])?"documents":$_GET['id']).".zip");
$name = ($path=='/')?'documents.zip':basename($path).'.zip';
DocumentManager::file_send_for_download($temp_zip_file,true,$name);
exit;
/**
==============================================================================
* Extra function (only used here)
==============================================================================
*/
/**
* Return the difference between two arrays, as an array of those key/values
* Use this as array_diff doesn't give the
*
* @param array $arr1 first array
* @param array $arr2 second array
* @return difference between the two arrays
*/
function diff($arr1,$arr2) {
$res = array(); $r=0;
foreach ($arr1 as $av) {
if (!in_array($av,$arr2)){
$res[$r]=$av; $r++;
}
}
return $res;
}
?>

Source for file downloadfolder.inc.php