<?php // $Id: downloadfolder.inc.php 17989 2009-01-25 05:51:54Z yannoo $
/* For licensing terms, see /dokeos_license.txt */
/**
==============================================================================
* Functions and main code for the download folder feature
*
* @package dokeos.work
==============================================================================
*/
$path = $_GET['path'];
//prevent some stuff
if(empty($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);
} else {
//cleanup: check the temp dir for old files and delete them
$handle=opendir($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);
$tbl_student_publication = Database::get_course_table(TABLE_STUDENT_PUBLICATION);
$prop_table = Database::get_course_table(TABLE_ITEM_PROPERTY);
//Put the files in the zip
//2 possibilities: admins get all files and folders in the selected folder (except for the deleted ones)
//normal users get only visible files that are in visible folders
//admins are allowed to download invisible files
if (is_allowed_to_edit()) {
//folder we want to zip --> no longer used, deleted files are included too like this
//$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 url FROM $tbl_student_publication AS work,$prop_table AS props WHERE props.tool='work' AND work.id=props.ref AND work.url LIKE 'work".$querypath."/%' AND work.filetype='file' AND props.visibility< >'2'",__FILE__,__LINE__);
//add tem to the zip file
while ($not_deleted_file = mysql_fetch_assoc($query)) { //var_dump($sys_course_path.$_course['path']."/".$not_deleted_file['url']);exit();
$zip_folder->add($sys_course_path.$_course['path']."/".$not_deleted_file['url'],PCLZIP_OPT_REMOVE_PATH, $sys_course_path.$_course['path']."/work".$remove_dir);
}
}
//for other users, we need to create a zipfile with only visible files and folders
else
{
if ($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 url FROM $tbl_student_publication AS work,$prop_table AS props WHERE props.tool='work' AND work.id=props.ref AND work.url LIKE 'work".$querypath."/%' AND work.filetype='file' AND props.visibility='1' AND props.lastedit_user_id='".api_get_user_id()."'",__FILE__,__LINE__);
//add them to an array
$all_visible_files_path = array();
while ($all_visible_files = mysql_fetch_assoc($query)) {
$all_visible_files_path[] = $all_visible_files['url'];
}
//2nd: get all folders that are invisible in the given path
$query2 = api_sql_query("SELECT url FROM $tbl_student_publication AS work,$prop_table AS props WHERE props.tool='work' AND work.id=props.ref AND work.url LIKE 'work".$querypath."/%' AND work.filetype='file' AND props.visibility< >'1' AND props.lastedit_user_id='".api_get_user_id()."'",__FILE__,__LINE__);
//if we get invisible folders, we have to filter out these results from all visible files we found
if (Database::num_rows($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)
$query3 = api_sql_query("SELECT url FROM $tbl_student_publication AS work,$prop_table AS props WHERE props.tool='work' AND work.id=props.ref AND work.url LIKE 'work".$invisible_folders['path']."/%' AND work.filetype='file' AND props.visibility='1' AND props.lastedit_user_id='".api_get_user_id()."'",__FILE__,__LINE__);
//add tem to an array
while ($files_in_invisible_folder = mysql_fetch_assoc($query3)) {
$files_in_invisible_folder_path[] = $files_in_invisible_folder['url'];
}
}
//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);
} else {
//no invisible folders found, so all visible files can be added to the zipfile
$files_for_zipfile = $all_visible_files_path;
}
//add all files in our final array to the zipfile
for ($i=0;$i< count ( $ files_for_zipfile ) ; $ i + + ) {
$zip_folder->add($sys_course_path.$_course['path']."/".$files_for_zipfile[$i],PCLZIP_OPT_REMOVE_PATH, $sys_course_path.$_course['path']."/work".$remove_dir);
}
}//end for other users
//logging
// launch event
event_download(basename($path).'.zip (folder)');
//start download of created file
$name = basename($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;
}
